COLUMBIA BANKING SYSTEM INC
10-K, 1997-03-28
SAVINGS INSTITUTION, FEDERALLY CHARTERED
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<PAGE>   1
  ============================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-K

(Mark One)
[X]  Annual report pursuant to Section 13 or 15(d) of the Securities Exchange
     Act of 1934
                                 [Fee Required]

                 For the fiscal year ended DECEMBER 31, 1996 or

[  ]  Transition report pursuant to Section 13 or 15(d) of the Securities
      Exchange Act of 1934

                               [No Fee Required]
                         Commission File Number 0-20288

                         COLUMBIA BANKING SYSTEM, INC.
             (Exact name of registrant as specified in its charter)

           WASHINGTON                                        91-1422237
(State or other jurisdiction of                           (I.R.S. Employer
incorporation or organization)                         Identification Number)

                              1102 BROADWAY PLAZA
                           TACOMA, WASHINGTON  98402
              (Address of principal executive offices)  (Zip code)

       Registrant's Telephone Number, Including Area Code: (206) 305-1900
        Securities Registered Pursuant to Section 12(b) of the Act: None
          Securities Registered Pursuant to Section 12(g) of the Act:

                           Common Stock, No Par Value

                                (Title of class)

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.
                          Yes   X          No 
                              -----          -----

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K (17 C.F.R. 229.405) is not contained herein, and will not be
contained, to the best of registrant's knowledge, in definitive proxy or
information statements incorporated by reference in Part III of this Form 10-K
or any amendment to this Form 10-K.

The aggregate market value of Common Stock held by non-affiliates of registrant
at February 28, 1997 was $90,418,214.

        The number of shares of registrant's Common Stock outstanding at
                        February 28, 1997 was  5,203,926

     Documents incorporated by reference and parts of Form 10-K into which
                                 incorporated:

Registrant's Annual Report to Shareholders                     Parts I and II
   for the year ended December 31, 1996
Registrant's definitive Proxy Statement                        Part III
   dated March 20, 1997


  ============================================================================
<PAGE>   2
                             CROSS REFERENCE SHEET

    Location in Annual Report to Shareholders and Definitive Proxy Statement
                         of Items required by Form 10-K

<TABLE>
<CAPTION>
                                                                  Annual Report to Shareholders and
                     Form 10-K                                        Definitive Proxy Statement
- -----------------------------------------------        ----------------------------------------------------
 Part and                                                                                             Page
 Item No.                     Caption                                   Caption                      Number
- ----------      -------------------------------        ----------------------------------------------------
<S>             <C>                                     <C>                                        <C>
PART I                                                  ANNUAL REPORT TO SHAREHOLDERS
                                                        -----------------------------
Item 1          Business

                  Consolidated Average Balance          Consolidated Five-Year Summary of
                   Sheet and Analysis of Net             Average Balances and Net Interest
                   Interest Income and Expense           Revenue                                   62
                                                        Management Discussion and Analysis of
                                                         Financial Condition and Results of
                                                         Operations("Management Discussion")
                                                                                                   20

                  Investments                           Note 4, Notes to Consolidated
                                                         Financial Statements                      46
                                                        Management Discussion - Securities         28

                  Lending Activities                    Management Discussion - Loan
                                                         Portfolio                                 24
                                                        Management Discussion - Nonperforming
                                                         Assets                                    26
                                                        Note 5, Notes to Consolidated
                                                         Financial Statements                      47

                  Summary of Loan Loss Experience       Management Discussion - Provision and
                                                         Allowance for Loan Losses                 27

                  Supervision and Regulation            Management Discussion - Capital            31


Item 2          Properties                              Note 7, Notes to Consolidated
                                                         Financial Statements                      49


Item 3          Legal Proceedings                       Note 12, Notes to Consolidated
                                                         Financial Statements                      53
</TABLE>
<PAGE>   3
<TABLE>
<CAPTION>
                                                                  Annual Report to Shareholders and
                     Form 10-K                                        Definitive Proxy Statement
- --------------------------------------------           ----------------------------------------------------
 Part and                                                                                             Page
 Item No.                     Caption                                   Caption                      Number
- ---------       ----------------------------           -----------------------------------------------------
<S>             <C>                                    <C>                                         <C>
PART II                                                ANNUAL REPORT TO SHAREHOLDERS
                                                       -----------------------------
Item 5          Market for the Registrant's            Management Discussion - Quarterly
                  Common Stock and Related               Common Stock Prices & Dividend
                  Stockholder Matters                    Payments                                  33


Item 6          Selected Financial Data                Consolidated Highlights                     15
                                                       Consolidated Five-Year Statements of
                                                         Operations                                60
                                                       Consolidated Five-Year Summary of
                                                         Average Balances and Net Interest
                                                         Revenue                                   62


Item 7          Management's Discussion and            Management Discussion                       20
                   Analysis of Financial
                   Condition and Results of
                   Operations
                                                       Consolidated Five-Year Summary of
                                                         Average Balances and Net Interest
                                                         Revenue                                   62


Item 8          Financial Statements and                Audited Financial Statements               36
                  Supplementary Data
                                                        Summary of Quarterly Financial
                                                         Information (Unaudited)                   59


Item 9          Changes in and Disagreements With       Recent Change in Accounting Firms          33
                  Accountants on Accounting and
                  Financial Disclosure



PART III                                                DEFINITIVE PROXY STATEMENT
                                                        --------------------------

Item 10         Directors and Executive Officers        Election of Directors                      2
                  of the Registrant


Item 11         Executive Compensation                  Executive Compensation                     6


Item 12         Security Ownership of Certain           Election of Directors                      2, 12
                  Beneficial Owners and
                  Management


Item 13         Certain Relationships and Related       Interest of Management in Certain
                  Transactions                           Transactions                              13
</TABLE>
<PAGE>   4
                         COLUMBIA BANKING SYSTEM, INC.
                                   FORM 10-K
                               December 31, 1996

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                   PART I                                         Page
                                                                                                  ----
<S>         <C>                                                                                    <C>
Item  1.     Business

             General                                                                               1
             Strategy                                                                              2
             Market Area                                                                           3
             Competition                                                                           4
             Employees                                                                             4
             Executive Officers of the Company                                                     5
             Effects of Governmental Monetary Policies                                             6
             Consolidated Average Balance Sheet and Analysis of Net Interest Income and Expense
                                                                                                   6
             Consolidated Analysis of Changes in Interest Income and Expense                       7
             Investments                                                                           8
             Lending Activities                                                                    10
             Summary of Loan Loss Experience                                                       12
             Deposits                                                                              13
             Significant Financial Ratios                                                          14
             Short-term Borrowings                                                                 14
             Supervision and Regulation                                                            14

Item  2.     Properties                                                                            18
Item  3.     Legal Proceedings                                                                     18
Item  4.     Submission of Matters to a Vote of Security Holders                                   18

                                                   PART II
Item  5.     Market for the Registrant's Common Stock and Related Stockholder Matters              18
Item  6.     Selected Financial Data                                                               18
Item  7.     Management's Discussion and Analysis of Financial Condition and Results of
               Operations                                                                          18
Item  8.     Financial Statements and Supplementary Data                                           19
Item  9.     Changes in and Disagreements With Accountants on Accounting and Financial
               Disclosure                                                                          19

                                                  PART III
Item 10      Directors and Executive Officers of the Registrant                                    19
Item 11.     Executive Compensation                                                                19
Item 12.     Security Ownership of Certain Beneficial Owners and Management                        19
Item 13.     Certain Relationships and Related Transactions                                        19

                                                   PART IV
Item 14.     Exhibits, Financial Statement Schedules and Reports on Form 8-K                       20
</TABLE>
<PAGE>   5
                                     PART I

ITEM 1.  BUSINESS

GENERAL

Columbia Banking System, Inc. (the "Company"), a Washington corporation, was
originally organized in 1988 under the name "First Federal Corporation" in
connection with the acquisition by an investor group, which included recently
deceased director emeritus Stanley Rose and current director Sidney Snyder, of
a savings association, which was later named Columbia Savings Bank, a Federal
Savings Bank ("the Savings Bank").  In 1990, an investor group headed by Arnold
Espe, (Chairman and Chief Executive Officer of the Company) and financed in
part by NorCap, LLC acquired from Mr. Rose a controlling interest in the
Company, a second corporation, Columbia National Bankshares, Inc. ("CNBI"), and
CNBI's sole subsidiary, Columbia National Bank, located in Longview,
Washington.  See "Security Ownership of Certain Beneficial Owners and
Management" and "Certain Transactions -- NorCap Options."  In connection with
the 1993 reorganization of the Company, CNBI was merged into the Company,
Columbia National Bank was merged into the newly chartered Columbia State Bank
("Columbia Bank") and additional management was added.  In 1994, the Savings
Bank was merged into Columbia Bank.

The 1993 reorganization was undertaken in order to take advantage of commercial
banking business opportunities resulting from increased consolidation of banks
in the Company's principal market area, primarily through acquisitions by
out-of-state holding companies, and the resulting dislocation of customers.  In
August 1993, the Company completed a public offering of common stock with net
proceeds of approximately $17.2 million, of which the Company contributed
approximately $16.3 million to the capital of Columbia Bank.  In connection
with the reorganization, the Company moved its headquarters to Tacoma,
Washington, with the intent of focusing on growth opportunities in the Tacoma
metropolitan area and contiguous parts of the Puget Sound region.  Management
believes the ongoing consolidation among financial institutions in Washington
has created significant gaps in the ability of large banks operating in
Washington to serve certain customers, particularly the Company's target
customer base of small and medium-sized businesses, professionals and other
individuals.  The business strategy of the Company is to provide its customers
with the financial sophistication and breadth of products of a regional bank
while retaining the appeal and service level of a community bank.  As a result
of the Company's strong commitment to highly personalized customer service, its
varied products, and the long-standing community presence of its managers,
lending officers and branch personnel, the Company believes it is well
positioned to attract new customers and to increase its market share in lending
and deposits.

In November and December 1996, the Company issued approximately 1.445 million
shares of common stock in a public offering.  The issuance raised approximately
$20.7 million in new capital.  The Company contributed approximately $10.0
million of these  proceeds to Columbia Bank primarily to fund additional
expansion in Pierce County, and, over the next several years, into south King
and Thurston Counties.  The remainder was used to repay a $3.0 million
borrowing and for general corporate purposes.

The Company's sole subsidiary, Columbia Bank, is a Washington state-chartered
commercial bank, the deposits of which are insured by the Federal Deposit
Insurance Corporation (the "FDIC").  Columbia Bank is subject to regulation by
the FDIC and the Washington State Department of Financial Institutions,
Division of Banks (the "Division").  Although Columbia Bank is not a member of
the Federal Reserve System, the Board of Governors of the Federal Reserve
System (the "Federal Reserve Board") has certain supervisory authority over the
Company which can also affect Columbia Bank.  Columbia Bank provides a wide
range of banking services to small- and medium-sized businesses and
individuals.

At December 31, 1996, the Company had total consolidated assets of $588.9
million, loans of $446.1 million and deposits of $493.2 million.





                                       1
<PAGE>   6
STRATEGY



The Company's goal is to create, over the next several years, a
well-capitalized, customer-focused Pacific Northwest commercial banking
institution with a significant presence in selected markets and total assets in
excess of  $1.0 billion.  Management believes that the ongoing consolidation in
its principal market area affords an opportunity for aggressive growth in loans
and deposits.  The Company's growth strategy consists of the following
elements:

   *     Focus on relationship lending to small and medium-sized businesses,
         professionals and other individuals whom the Company believes are
         underserved by larger banks in its market area and are attracted by
         the Company's emphasis on relationship banking.

   *     Fund loan growth through the creation of a branch system catering
         primarily to retail depositors, supplemented by business banking
         customer deposits and other borrowings.

   *     Continue growth in the Tacoma metropolitan area and selectively expand
         into neighboring King and Thurston Counties.

   *     Control credit risk through established loan underwriting and
         monitoring procedures, loan concentration limits, product and industry
         diversification, and the hiring of experienced lending personnel with
         a high degree of familiarity with their market area.

   Focus on Relationship Lending.  The Company focuses on lending to small and
medium-sized businesses, professionals and other individuals who value high
levels of customer service from a locally based institution.  The Company
believes that there are significant commercial banking business opportunities
arising from the ongoing consolidation of banks in its principal market area,
primarily through acquisitions by out-of- state holding companies, and the
resulting dislocation of customers.  Management believes that many business
customers of previously acquired banks are dissatisfied with low levels of
service and the lack of personal contact, flexibility and local decision-making
authority at these institutions, and thus willing to transfer their primary
banking relationship to a customer-service oriented institution like the
Company which can be more responsive to their specific needs.  As part of its
effort to provide responsive service to its target customers, the Company
markets a varied menu of relationship banking products, including private
banking and cash management services.  Management continually strives to
develop a business culture in which customers are accorded the highest priority
in all aspects of the Company's operations.  This philosophy is combined with
the Company's emphasis on personalized, local decision-making in each of the
markets it serves.

   Create a Branch-Based Deposit Franchise.  In order to fund its lending
activities, the Company is establishing a branch system catering primarily to
retail depositors, supplemented by business banking customer deposits and other
borrowings.  The Company believes this mix of funding sources will enable it to
expand its commercial lending activities rapidly while establishing a stable
core deposit base.  Additionally, the Company's strategically placed branch
offices allow for increased contact with customers.  While the Company's
primary lending focus will continue to be on business lending, management
believes that its customer deposit and lending activities will produce
significant benefits, including increased core deposits and greater loan
portfolio diversification.





                                       2
<PAGE>   7
   Geographic Expansion.  The Company currently has regulatory approval to open
four additional branches in Pierce County, and anticipates opening several more
branches in the next few years to strengthen its local market position and
capitalize on expansion opportunities resulting from strong demand for a
locally based banking institution.  The Company also currently anticipates
expansion into neighboring Thurston County (the location of Olympia, the
capital of Washington) and parts of neighboring King County, such as Bellevue
and surrounding areas and the Auburn and Kent Valley areas.  The Company plans
to effect its growth strategy through a combination of growth at existing
branch facilities, new branch openings and acquisitions.  Typically, expansion
into new markets will be in connection with the hiring of an experienced branch
manager and /or lending officers with strong community ties and banking
relationships.

   Control credit Risk.  Management considers the maintenance of high asset
quality, with corresponding low levels of nonperforming assets and charge-offs,
to be of utmost importance as it pursues its growth strategy.  The Company has
implemented loan underwriting and monitoring procedures and loan concentration
limits which management believes permit continued portfolio expansion without
materially increasing credit risk.  The Company will also seek to control
credit risk as it grows through increased product and industry diversification,
by expanding its loan product offerings and related services, and through the
hiring of experienced lending personnel with a high degree of familiarity with
their market area.

MARKET AREA

The Company's principal market area is the Tacoma metropolitan area and
contiguous parts of the Puget Sound region of Washington state.  The economy of
that area, while primarily dependent upon aerospace, foreign trade and natural
resources, including agriculture and timber, has become more diversified over
the past decade as a result of the success of Microsoft and the establishment
of numerous research and biotechnology firms.  The Washington economy and that
of the Puget Sound region generally have experienced moderate growth and
stability in recent years.  According to the Puget Sound Economic Forecaster, a
regional publication providing economic forecasts and commentary, the greater
Puget Sound economy is projected to expand at nearly twice the national rate
for the years 1997 through 1999.  The region is projected to add 220,000 new
jobs and 290,000 new residents during this time.  Boeing, the region's largest
employer, has announced increased production after recent years of declining
orders for aircraft and related reductions in its work force.  Microsoft and
other major employers in the area east of Seattle also anticipate continued
growth.

Pierce County, the area in which the Company's expansion is primarily focused,
is located in the South Puget Sound region.  The economy of this area is
well-diversified, with the principal industries being aerospace, shipping,
military-related government employment, agriculture and forest products.
Pierce County's economy is expected to benefit over the next few years because
of Intel's decision to build a computer chip facility in DuPont and the
expansion of the Matsushita semiconductor plant in Puyallup, east of Tacoma.
The Puget Sound Economic Forecaster predicts that Pierce County will likely
have the strongest economic performance in the Puget Sound region through 1999.
Forbes magazine recently published its prediction that the Tacoma area would be
among the top twenty-five cities in the United States in terms of job growth,
especially in the area of computers and semiconductors.

Bellevue, where the Company has two banking offices, is located in an area
known as the "Eastside", a metropolitan area with a population of approximately
215,000 that includes several cities located east of Seattle.  A large portion
of the Eastside economy is linked to aerospace, construction, computer software
and biotechnology industries.  Microsoft is headquartered just north of
Bellevue and several biotech firms are located on the Eastside.  In recent
years, the Eastside has experienced relatively rapid growth in population and
employment, and household incomes in the Eastside are among the highest in
Washington.





                                       3
<PAGE>   8
The Company anticipates further expanding into neighboring south King County,
which contains several residential communities whose employment base is
supported by light industrial, aerospace, and forest products industries.  With
its close proximity to Tacoma, this market area is considered an important
natural extension of the Company's Pierce County market area.  The Weyerhaeuser
Corporation maintains its world headquarters in Federal Way, which is located
in south King County adjacent to the King / Pierce County line.  The Auburn and
Kent Valley areas to the east of Federal Way are also considered by management
to be natural areas of expansion for the Company.

Expansion south of Tacoma into Thurston County is also considered by management
to be an extension of the Company's Pierce County market area.  Olympia, with a
population of approximately 38,000, and the neighboring community of Lacey,
with a population of approximately 26,000, are the principal cities in Thurston
County.  As of April 1996, the county had an approximate population of 193,000.
The area enjoys a stable economic climate due largely to state government
employment and the proximity of the Fort Lewis Army Base and McChord Air Force
Base.  According to the Thurston County Regional Planning Council, out of a
total civilian work force of 88,000, approximately 33% were employed by
federal, state, and local government.  The area also has a significant
population of retired military personnel.

The Company's market area also includes the Longview and Woodland communities
in southwestern Washington.  The population of Cowlitz County, in which
Longview and Woodland are located, is approximately 85,000.  Cowlitz County's
economy has become more diversified in recent years, but remains materially
dependent on the forest products industry and, as a result, is relatively
vulnerable to the cyclical downturns of that industry as well as environmental
disputes.

COMPETITION

The Company anticipates that the substantial consolidation among financial
institutions in Washington that has occurred to date will continue, due in part
to recent federal legislation concerning interstate banking.  Legislation has
recently been passed by the Washington legislature (effective June 1996) that
allows, subject to certain conditions, mergers or other combinations,
relocations of a bank's main office and branching across state lines in advance
of the June 1, 1997 date established by federal law (see "Supervision and
Regulation -- Other Regulatory Developments").  Many other financial
institutions, most of which have greater resources than the Company, compete
with the Company for banking business in the Company's market area.  Among the
advantages of some of these institutions are their ability to make larger
loans, finance extensive advertising campaigns, access international money
markets and allocate their investment assets to regions of highest yield and
demand.  The Company currently does not have a significant market share of the
deposit-taking or lending activities in the areas in which it conducts
operations.  The Company's strategy involves significant expansion throughout
the Tacoma metropolitan area and contiguous parts of the Puget Sound region of
Washington.  Although, the Company has been able to compete effectively in its
market areas to date, there can be no assurance that it will be able to
continue to do so in the future.

EMPLOYEES

At December 31, 1996, the Company had 247 full-time equivalent employees.  The
Company has placed an increased emphasis and high priority on staff
development.  This development involves selective hiring and extensive training
(including customer service training).  New hires are selected on the basis of
both technical skills and customer service capabilities.  Emphasis has been
placed upon hiring and retaining additional key officers in areas such as
lending, administration and finance.  None of the Company's employees are
covered by a collective bargaining agreement with the Company, and management
believes that its relationship with its employees is satisfactory.





                                       4
<PAGE>   9

EXECUTIVE OFFICERS OF THE COMPANY

The following table sets forth certain information about the executive officers
of the Company.
<TABLE>
<CAPTION>
                                                                                   Has Served as an
                                                                                 Executive Officer of
                                                                                     the Company
            Name               Age                        Position                      Since
- -----------------------------------------------------------------------------------------------------
<S>                           <C>     <C>                                                <C>
A. G. Espe(1)                 60      Director, Chairman and Chief Executive Officer     1990
W. W. Philip(2)               70      Director, President and Chief Operating Officer    1993
Donald A. Andersen(3)         51      Senior Vice President, Senior Credit               1996
                                        Administrator - Columbia Bank
Julie A. Healy(4)             41      Senior Vice President, Operations Manager          1994
H. R. Russell(5)              42      Senior Vice President, Senior Loan Production      1996
                                        Officer - Columbia Bank
Gary R. Schminkey(6)          39      Senior Vice President and Chief Financial          1993
                                        Officer                                              
Evans Q. Whitney(7)           53      Senior Vice President, Human Resources Director    1994
</TABLE>


(1)  Mr. Espe has been Chairman of the Board of the Company since September 1990
     and Chief Executive Officer of the Company since march 1993.  Mr. Espe, who
     is also Chairman of the Board of Columbia Bank and of Northrim Bank, has
     extensive banking and business experience.  From 1985 to 1989, Mr. Espe
     served as Chairman of the Board, President and Chief Executive Officer of
     Key Pacific Bancorp.

(2)  Mr. Philip has been a director of the Company since July 1993.  He became
     President and Chief Operating Officer of the Company and President and
     Chief Executive Officer of Columbia Bank in August 1993 when the Company's
     reorganization was completed and the Company began operations in Tacoma.
     Until his retirement in December 1992, Mr. Philip was Chairman of the Board
     and Chief Executive Officer of Puget Sound Bancorp ("PSB") since its
     inception in 1981 and was Chairman of the Board and Chief Executive Officer
     of Puget Sound National Bank prior to and after the inception of PSB,
     having served with that institution for more than 40 years.

(3)  Mr. Andersen joined Columbia Bank as Senior Vice President -- Commercial
     Loans in January 1995.  Mr. Andersen was employed by Puget Sound National
     Bank and its successor institution for nearly 25 years, having served as
     Vice President -- Commercial Loan Officer from 1991 to 1995.

(4)  Ms. Healy joined Columbia Bank as Senior Vice President -- Operations in
     June 1993.  Ms. Healy was employed by Puget Sound National Bank for nearly
     12 years, having served as Vice President -- Operations from 1991 to 1993.

(5)  Mr. Russell joined Columbia Bank as Senior Vice President -- Commercial
     Loans in October 1993.  Mr. Russell was employed by Puget Sound National
     Bank and its successor institution for nearly 14 years, having served as
     Vice President -- Commercial Loan Officer from 1991 to 1993.





                                       5
<PAGE>   10


(6)  Mr. Schminkey joined Columbia Bank as Vice President and Controller in
     March 1993.  He was appointed Senior Vice President -- Chief Financial
     Officer of Columbia Bank and the Company in 1994.  Mr. Schminkey was
     employed by PSB, Puget Sound National Bank and its successor institution
     for nearly 10 years, having served from 1991 to 1993 as Assistant Vice
     President -- Assistant Controller for PSB and during that same period as
     Vice President -- Accounting and Finance for Puget Sound National Bank and
     its successor institution.

(7)  Mr. Whitney joined Columbia Bank as Senior Vice President -- Human
     Resources in March 1993.  Mr. Whitney is also the Senior Vice President - -
     Human Resources of the Company.  Mr. Whitney was employed by PSB and Puget
     Sound National Bank for nearly 27 years, having served as Senior Vice
     President -- Human Resources for PSB and Puget Sound National Bank from
     1991 to 1993.

All officers are elected by the Board of Directors and serve at the pleasure of
the Board for an unspecified term.

EFFECTS OF GOVERNMENTAL MONETARY POLICIES

Profitability in banking depends on interest rate differentials.  In general,
the difference between the interest earned on a bank's loans, securities and
other interest-earning assets and the interest paid on a bank's deposits and
other interest-bearing liabilities is the major source of a bank's earnings.
Thus, the earnings and growth of the Company are affected not only by general
economic conditions, but also by the monetary and fiscal policies of the United
States and its agencies, particularly the Federal Reserve.  The Federal Reserve
implements national monetary policy for such purposes as controlling inflation
and recession by its open-market operations in United States government
securities, control of the discount rate applicable to borrowings from the
Federal Reserve and the establishment of reserve requirements against certain
deposits.  The actions of the Federal Reserve in these areas influence growth
of bank loans, investments and deposits and also affect interest rates charged
on loans and paid on deposits.  The nature and impact of future changes in
monetary policies and their impact on the Company are not predictable.

CONSOLIDATED AVERAGE BALANCE SHEET AND ANALYSIS OF NET INTEREST INCOME AND
EXPENSE

For information concerning consolidated daily average balances, along with
average yields for earning assets and average interest rates for
interest-bearing liabilities, see "Consolidated Five-Year Summary of Average
Balances and Net Interest Revenue" at page 62 of the Annual Report to
Shareholders for the year ended December 31, 1996 ("Annual Report"), which is
incorporated herein by reference.  See also "Management Discussion and Analysis
of Financial Condition and Results of Operations" ("Management Discussion")
beginning at page 20 of the Annual Report for additional details on various
asset and liability categories.





                                       6
<PAGE>   11
CONSOLIDATED ANALYSIS OF CHANGES IN INTEREST INCOME AND EXPENSE

The following table sets forth the amounts of the changes in consolidated net
interest income attributable to changes in volume and changes in interest rates
for the Company.  Changes attributable to the combined effect of volume and
interest rates have been allocated proportionately to the changes due to volume
and the changes due to interest rates.
<TABLE>
<CAPTION>
                                                1996 Compared to 1995                1995 Compared to 1994
                                              Increase (Decrease) Due to           Increase (Decrease) Due to
                                              --------------------------           --------------------------
(in thousands)                             Volume       Rate        Total       Volume       Rate        Total
- ---------------------------------------------------------------------------------------------------------------
<S>                                    <C>        <C>           <C>          <C>        <C>         <C>
INTEREST INCOME
Loans:
  Commercial business                  $3,628      $  (832)      $2,796      $2,728     $   986      $3,714
  One- to four-family residential        (349)        (304)        (653)      1,693         885       2,578
  Five or more family residential and
    commercial properties               3,291         (146)       3,145       3,002          85       3,087
  Consumer                                967         (245)         722       1,439         230       1,669
- ----------------------------------------------------------------------------------------------------------------
    Total loans                         7,537       (1,527)       6,010       8,862       2,186      11,048
Securities                                492           18          510         (40)         76          36
Interest-earning deposits with banks      850          (28)         822          55         (75)        (20)
- ----------------------------------------------------------------------------------------------------------------
    Total interest revenue             $8,879      $(1,537)      $7,342      $8,877      $2,187     $11,064
================================================================================================================

INTEREST EXPENSE
Certificates of deposit                $1,176        $ (29)      $1,147      $2,424      $1,546      $3,970
Savings accounts                          (81)          20          (61)       (257)         31        (226)
Interest-bearing demand                 2,236         (238)       1,998       1,261       1,076       2,337
- ----------------------------------------------------------------------------------------------------------------
    Total interest on deposits          3,331         (247)       3,084       3,428       2,653       6,081
Federal Home Loan Bank advances           459          (97)         362         200         143         343
Other borrowings                          (70)         (17)         (87)       (324)        (17)       (341)
- ----------------------------------------------------------------------------------------------------------------
    Total interest expense             $3,720     $   (361)     $3,359       $3,304      $2,779      $6,083
================================================================================================================
</TABLE>





                                       7
<PAGE>   12
INVESTMENTS

For additional information concerning securities (securities available for
sale), see Note 4 of "Notes to Consolidated Financial Statements" at page 46 of
the Annual Report and "Management Discussion - Securities" at page 28 of the
Annual Report, all of which are incorporated herein by reference.

Investment securities are those securities which the Company has the ability
and the intent to hold to maturity.  Events which may be reasonably anticipated
are considered when determining the Company's intent to hold investment
securities for the foreseeable future.  Investment securities are carried at
cost, adjusted for amortization of premiums and accretion of discounts.

Securities to be held for indefinite periods of time and not intended to be
held to maturity are classified as available for sale and carried at fair
value.  Securities held for indefinite periods of time include securities that
management intends to use as part of its asset/liability management strategy
and that may be sold in response to changes in interest rates and/or
significant prepayment risks.

At December 31, 1996, all of the Company's securities were classified in the
"available for sale" portfolio.  At December 31, 1996, there were no securities
of any issuer that exceeded ten percent of shareholders' equity.

The following table summarizes the amortized cost, gross unrealized gains and
losses and the resulting market value of securities available for sale.

<TABLE>
<CAPTION>
                                                                      Gross          Gross
                                                     Amortized      Unrealized     Unrealized       Market
 (in thousands)                                         Cost          Gains          Losses          Value
- -----------------------------------------------------------------------------------------------------------
<S>                                                <C>               <C>            <C>        <C>
December 31, 1996:
  U.S. Treasury & government agency                   $30,441           $40                        $30,481

  Mortgage-backed                                      10,874                         ($114)        10,760

  FHLB stock                                            4,248                                        4,248
- -----------------------------------------------------------------------------------------------------------
    Total                                             $45,563           $40           ($114)       $45,489
===========================================================================================================

December 31, 1995:
  U.S. Treasury & government agency                   $ 6,935           $13                        $ 6,948

  Mortgage-backed                                      12,572                         ($126)        12,446

  FHLB stock                                            3,281                                        3,281
- -----------------------------------------------------------------------------------------------------------
    Total                                             $22,788           $13           ($126)       $22,675
===========================================================================================================

December 31, 1994:
  Mortgage-backed                                     $ 3,079                         ($361)       $ 2,718
===========================================================================================================
</TABLE>





                                       8
<PAGE>   13
At December 31, 1996 and 1995, the Company had no securities held for
investment purposes.  The following table summarizes the recorded value, gross
unrealized gains and losses and the resulting market value of investment
securities as of December 31, 1994:

<TABLE>
<CAPTION>
                                                                      Gross          Gross
                                                      Recorded      Unrealized     Unrealized       Market
- -----------------------------------------------------------------------------------------------------------
 (in thousands)                                        Value          Gains          Losses          Value
<S>                                                <C>                <C>          <C>         <C>
 December 31, 1994:
U.S. Treasury                                      $  1,003                         ($ 17)       $   986

Mortgage-backed                                      16,389                         ( 863)        15,526

FHLB stock and other                                  2,149                                        2,149
- -----------------------------------------------------------------------------------------------------------
Total                                               $19,541                         ($880)       $18,661
===========================================================================================================
</TABLE>

The following table provides the carrying values, maturities and weighted
average yields of the Company's "available for sale" portfolio at December 31,
1996.

<TABLE>
<CAPTION>
                                                                       Maturing
                                            ------------------------------------------------------------------
                                                          After 1       After 5
                                            Within 1     But Within   But Within     After 10
(dollars in thousands)                        Year        5 Years      10 Years        Years        Total
- --------------------------------------------------------------------------------------------------------------
U.S. Treasury
<S>                                         <C>            <C>             <C>          <C>         <C>
  Balance                                   $15,040         $ 2,000                                  $ 17,040
  Weighted Average Yield                       5.74%           5.68%                                     5.73%

U.S. government agency
  Balance                                                    11,728                     $1,713         13,441
  Weighted Average Yield                                       6.56%                      6.51%          6.55%

Mortgage-backed (1)
  Balance                                                     8,801        $1,959                      10,760
  Weighted Average Yield                                       5.32%         6.17%                       5.47%

FHLB stock and other (2)
  Balance                                                                                4,248          4,248
  Weighted Average Yield                                                                  7.80%          7.80%
- --------------------------------------------------------------------------------------------------------------
Total
  Balance                                   $15,040         $22,529        $1,959       $5,961        $45,489
  Weighted Average Yield                       5.74%           6.00%         6.17%        7.43%          6.11%
- --------------------------------------------------------------------------------------------------------------
</TABLE>

 (1)  The maturities reported for mortgage-backed securities are based on
      contractual maturities and principal amortization.

 (2) The weighted average yield on FHLB stock is based upon the dividend yield
     and average balances for the 12 months ended December 31, 1996.





                                       9
<PAGE>   14
LENDING ACTIVITIES

The following table sets forth the composition of the Company's loan portfolio
by type of loan at the dates indicated.

<TABLE>
<CAPTION>
 (in thousands) December 31,               1996         1995          1994         1993          1992
- -----------------------------------------------------------------------------------------------------------
<S>                                       <C>           <C>          <C>           <C>           <C>
Commercial business                       $169,318      $113,775     $ 72,829      $ 44,772      $ 16,511

Real estate:

  One-to four-family residential            67,709        67,991       76,260        55,804        53,161

  Five or more family residential and
   commercial properties                   128,803        97,103       68,531        45,193        30,681
- -----------------------------------------------------------------------------------------------------------
    Total real estate                      196,512       165,094      144,791       100,997        83,842

Real estate construction:

  One- to four-family residential           21,380        22,741       17,411        16,328         9,408

  Five or more family residential and
   commercial properties                    10,680         8,884        4,004         4,799         4,689
- -----------------------------------------------------------------------------------------------------------
    Total real estate construction          32,060        31,625       21,415        21,127        14,097

Consumer                                    48,807        43,343       30,860        14,417         6,584
- -----------------------------------------------------------------------------------------------------------
  Subtotal                                 446,697       353,837      269,895       181,313       121,034

Less deferred loan fees and other             (602)         (744)        (899)         (297)         (237)
- -----------------------------------------------------------------------------------------------------------
  Total loans                             $446,095      $353,093     $268,996      $181,016      $120,797
===========================================================================================================

Loans held for sale                      $  11,341      $  1,367     $  1,612      $  1,777      $  2,021
===========================================================================================================
</TABLE>


         NOTE: During 1994, as part of its focus on loan quality, management
          developed more detailed statistical information on various types of
          lending.  In this connection, the December 31, 1996, 1995 and 1994
          loan balances in the table above reflect changes in classifications
          from prior periods.  Due to the impracticality of developing similar
          information for prior period balances, prior period balances have not
          been restated and, as a result, are not comparable with December 31,
          1996, 1995 and 1994.



The following table presents at December 31, 1996, (i) the aggregate maturities
of loans in each major category of the Company's loan portfolio and (ii) the
aggregate amounts of variable and fixed rate loans that mature after one year.
<TABLE>
<CAPTION>
                                                                    Maturing
                                       ------------------------------------------------------------------
                                                            After 1 But       After Five
(in thousands)                            Within 1 Year    Within 5 Years       Years            Total
- -----------------------------------------------------------------------------------------------------------
<S>                                          <C>               <C>                 <C>         <C>
Commercial business                          $146,357          $22,509             $452         $169,318

Real estate construction                       31,852               55              153           32,060
- -----------------------------------------------------------------------------------------------------------
        Total                                $178,209          $22,564             $605         $201,378
===========================================================================================================

Fixed rate loans                                               $17,561             $605        $  18,166

Variable rate loans                                              5,003                             5,003
- -----------------------------------------------------------------------------------------------------------
        Total                                                  $22,564             $605        $  23,169
===========================================================================================================
</TABLE>





                                       10
<PAGE>   15

Risk Elements

Risk elements consist of: (i) nonaccrual loans, which are loans placed on a
nonaccrual basis generally when the loan becomes past due 90 days or when there
are otherwise serious doubts about the collectibility of principal or interest;
(ii) restructured loans, for which concessions, including the reduction of
interest rates below a rate otherwise available to that borrower or the
deferral of interest or principal, have been granted due to the borrower's
weakened financial condition (interest on restructured loans is accrued at the
restructured rates when it is anticipated that no loss of original principal
will occur); (iii) accruing loans which are contractually past due ninety days
or more as to interest or principal payments; and (iv) potential problem loans,
which are currently performing and are not included in nonaccrual or
restructured loans, but about which there are serious doubts as to the
borrower's ability to comply with present repayment terms and, therefore, will
likely be included later in nonaccrual, past due or restructured loans.

The following table sets forth, at the dates indicated, information with
respect to nonaccrual loans, restructured loans, total nonperforming loans
(nonaccrual loans plus restructured loans), real estate owned ("REO"), total
nonperforming assets, accruing loans past-due 90 days or more and potential
problem loans of the Company.

<TABLE>
<CAPTION>
 (in thousands) December 31,                  1996          1995         1994          1993         1992
- -----------------------------------------------------------------------------------------------------------
<S>                                        <C>           <C>           <C>           <C>          <C>
 Nonaccrual                                $2,227       $   435       $   452       $1,631       $   650

 Restructured                                  25            29            44           94           109
- -----------------------------------------------------------------------------------------------------------
    Total nonperforming loans               2,252           464           496        1,725           759

 Real estate owned                             40         3,304         3,227        3,305         2,959
- -----------------------------------------------------------------------------------------------------------
    Total nonperforming assets             $2,292        $3,768        $3,723       $5,030        $3,718
===========================================================================================================

 Accruing loans past-due 90 days or                     $   152       $    82
   more
===========================================================================================================

 Potential problem loans                 $   213
===========================================================================================================
</TABLE>


For information pertaining to risk elements, see the appropriate sections in
"Management Discussion - Loan Portfolio" beginning at page 24 of the Annual
Report, "Management Discussion - Nonperforming Assets" beginning at page 26 of
the Annual Report and Note 5 of "Notes to Consolidated Financial Statements"
beginning at page 47 of the Annual Report, all of which are incorporated herein
by reference.





                                       11
<PAGE>   16
SUMMARY OF LOAN LOSS EXPERIENCE

The following table provides an analysis of net losses by loan type for the
last five years.

<TABLE>
<CAPTION>
(dollars in thousands) December 31,          1996          1995         1994          1993         1992
- -----------------------------------------------------------------------------------------------------------
<S>                                        <C>          <C>           <C>          <C>           <C>
Total loans, net at end of period         $446,095     $353,093      $268,996     $181,016      $120,797
Daily average loans                        405,131      318,039       222,236      140,353       107,182
- -----------------------------------------------------------------------------------------------------------

Balance of allowance for loan losses
  at beginning of period                  $  3,748     $  2,711      $  1,992     $  1,539      $  1,426

Charge-offs:

  Real estate:

    One- to four-family residential                                                                  (31)

    Five or more family residential and
     commercial properties                                                                           (18)

  Commercial business                         (514)        (148)         (258)         (72)          (45)

  Consumer                                    (170)        (115)         (106)         (38)          (32)
- -----------------------------------------------------------------------------------------------------------
    Total charge-offs                         (684)        (263)         (364)        (110)         (126)

Recoveries:

  Real estate:

    One-to four-family residential                                                                     1

    Five or more family residential and
      commercial properties

  Commercial business                           17           45            83           56            47

  Consumer                                       3            5                          5            16
- -----------------------------------------------------------------------------------------------------------
    Total recoveries                            20           50            83           61            64
- -----------------------------------------------------------------------------------------------------------
      Net charge-offs                         (664)        (213)         (281)         (49)          (62)

Provision charged to expense                 1,420        1,250         1,000          502           170

Allowance acquired in purchase of
  branch                                                                                               5
- -----------------------------------------------------------------------------------------------------------
Balance of allowance for loan losses at
  end of period                           $  4,504     $  3,748      $  2,711     $  1,992      $  1,539
===========================================================================================================

Ratio of net charge-offs during period
  to average loans outstanding               0.16%        0.07%         0.13%        0.03%         0.06%
===========================================================================================================
</TABLE>



In determining the adequacy of the allowance, management considered numerous
factors including the level of nonperforming loans, loan loss experience,
credit concentrations, a review of the quality of the loan portfolio,
collateral values and uncertain economic conditions.

For additional information, see "Management Discussion - Provision and
Allowance for Loan Losses" at page 27 of the Annual Report, which is
incorporated herein by reference.





                                       12
<PAGE>   17
The table below shows the allocation of the Allowance for Loan Losses for the
last five years.  The allocation is based on an evaluation of defined loan
problems, historical ratios of loan losses and other factors which may affect
future loan losses in the categories of loans shown.

<TABLE>
<CAPTION>
  (dollars in thousands)
    December 31,                  1996             1995              1994             1993             1992
- -------------------------------------------------------------------------------------------------------------------
                                      % of              % of             % of             % of              % of
  Balance at End of                   Total            Total             Total            Total            Total
   Period Applicable to:     Amount   Loans*  Amount   Loans*   Amount   Loans*   Amount  Loans*   Amount   Loans*
- -------------------------------------------------------------------------------------------------------------------
 <S>                         <C>     <C>      <C>       <C>      <C>       <C>     <C>       <C>     <C>      <C>
  Commercial business      $3,103    37.9%    $1,796    32.2%   $1,369     27.0%   $  389    23.6%   $  348   13.2%

  Real estate and
   construction:

    One- to four-family       933    19.9        560     25.6      687     34.7       489    42.6       390   53.4
      residential

    Five or more family
      residential             294    31.3        187     30.0      146     26.9       545    26.3       264   28.2
      and commercial
      properties

  Consumer                    402    10.9        284     12.2      216     11.4       138     7.5        88    5.2

  Unallocated                (228)               921               293                431               449
- -------------------------------------------------------------------------------------------------------------------
    Total                  $4,504   100.0%    $3,748   100.0%   $2,711      100%   $1,992     100%   $1,539    100%
===================================================================================================================
</TABLE>

 *Represents the total of all outstanding loans in each category as a percent
  of total loans outstanding.

DEPOSITS

The following table presents the average balances outstanding and weighted
average interest rate for each major category of deposits:

<TABLE>
<CAPTION>
  years ended December 31,                  1996                       1995                      1994
- -------------------------------------------------------------------------------------------------------------------
                                    Average      Average       Average     Average       Average      Average
 (dollars in thousands)             Balance      Rate Paid     Balance     Rate Paid     Balance      Rate Paid
- -------------------------------------------------------------------------------------------------------------------
<S>                                  <C>            <C>        <C>             <C>        <C>            <C>
 Interest-bearing demand and
   money market accounts             $142,103       3.62%      $  79,706       3.95%      $  38,962      2.09%

 Savings accounts                      21,673        2.80         24,547        2.73         33,938       2.64

 Certificates of deposit              189,122        5.66        168,351        5.68        122,198       4.58
- -------------------------------------------------------------------------------------------------------------------
   Total interest-bearing deposits    352,898        4.67        272,604        4.91        195,098       3.74
 Demand and other
   noninterest-bearing                 60,691                     42,167                     26,238
- -------------------------------------------------------------------------------------------------------------------
   Total deposits                    $413,589                   $314,771                   $221,336
===================================================================================================================
</TABLE>



The following table shows the amount and maturity of certificates of deposit
that had balances of more than $100,000:
<TABLE>
<CAPTION>
(in thousands) December 31,                                                              1996
- ------------------------------------------------------------------------------------------------
<S>                                                                                     <C>
Remaining maturity
  Three months or less                                                                  $38,318
  Over three through six months                                                          16,408
  Over six through twelve months                                                         18,870
  Over twelve months                                                                      7,626
- ------------------------------------------------------------------------------------------------
    Total                                                                               $81,222
================================================================================================
</TABLE>





                                       13
<PAGE>   18
SIGNIFICANT FINANCIAL RATIOS

Ratios for the last three years, based on daily average balances, are as
follows:

<TABLE>
<CAPTION>
                                                            1996             1995             1994
- ------------------------------------------------------------------------------------------------------
<S>                                                         <C>              <C>               <C>
Return on assets                                            0.73%            0.74%             (0.22%)

Return on equity                                            9.68             9.25              (2.12)

Dividend payout ratio

Equity to assets                                            7.55             7.95              10.38
</TABLE>


SHORT-TERM BORROWINGS

At December 31, 1996, 1995 and 1994, there were no short-term (original
maturity of one year or less) borrowings that exceeded 30 percent of
shareholders' equity at the end of the period.

SUPERVISION AND REGULATION

The Company and Columbia Bank are subject to extensive federal and Washington
state legislation, regulation and supervision.  These laws and regulations are
primarily intended to protect depositors and the FDIC rather than shareholders
of the Company.  The laws and regulations affecting banks and bank holding
companies have changed significantly over recent years, and there is reason to
expect that similar changes will continue in the future.  Any change in
applicable laws, regulations or regulatory policies may have a material effect
on the business, operations and prospects of the Company.  The Company is
unable to predict the nature or extent of the effects on its business and
earnings that any fiscal or monetary policies or new federal or state
legislation may have in the future.  The following information is qualified in
its entirety by reference to the particular statutory and regulatory provisions
described herein.

THE COMPANY

The Company is subject to regulation as a bank holding company within the
meaning of the Bank Holding Company Act of 1956 (the "BHCA"), as amended.  As
such, the Company is supervised by the Federal Reserve Board.

The Federal Reserve Board has the authority to order bank holding companies to
cease and desist from unsound practices and violations of conditions imposed by
the Board.  The Federal Reserve Board is also empowered to assess civil money
penalties against companies and individuals who violate the BHCA or orders or
regulations thereunder in amounts up to $1.0 million per day or order
termination of non-banking activities of non-banking subsidiaries of bank
holding companies, and to order termination of ownership and control of a
non-banking subsidiary by a bank holding company.  Certain violations may also
result in criminal penalties.  The FDIC is authorized to exercise comparable
authority under the Federal Deposit Insurance Act and other statutes with
respect to state nonmember banks such as Columbia Bank.

The Federal Reserve Board takes the position that a bank holding company is
required to serve as a source of financial and managerial strength to its
subsidiary banks and may not conduct its operations in an unsafe or unsound
manner.  In addition, it is the Board's position that in serving as a source of
strength to its subsidiary banks,  bank holding companies should be prepared to
use available resources to provide adequate capital funds to its subsidiary
banks during periods of financial stress or adversity and should maintain the
financial flexibility and capital raising capacity to obtain additional
resources for assisting its subsidiary banks.  A bank holding company's failure
to meet its obligations to serve as a source of strength to its subsidiary
banks will generally be considered by the Board to be an unsafe and unsound
banking practice or a violation of the Board's regulations of both.  The
Federal Deposit Insurance Act requires an undercapitalized institution to
submit to the Federal Reserve Board a capital restoration plan with a guarantee
by each company having control of the bank's compliance with the plan.





                                       14
<PAGE>   19
The BHCA prohibits a bank holding company, with certain exceptions, from
acquiring direct or indirect ownership or control of any company which is not a
bank or from engaging in any activities other than those of banking, managing
or controlling banks and certain other subsidiaries, or furnishing services to
or performing services for its subsidiaries.  One principal exception to these
prohibitions allows a bank holding company to acquire an interest in companies
whose activities are found by the Federal Reserve Board, by order or by
regulation, to be so closely related to banking or managing or controlling
banks as to be a proper incident thereto.  The Company must obtain the approval
of the Federal Reserve before it acquires all, or substantially all, of any
bank, or ownership or control of more than 5 percent of the voting shares of a
bank.

The Company is required under the BHCA to file an annual report and periodic
reports with the Federal Reserve Board and such additional information as the
Federal Reserve Board may require pursuant to the BHCA.  The Board may examine
a bank holding company and any of its subsidiaries and charge the company for
the cost of such an examination.

The Company and any subsidiaries which it may control are deemed "affiliates"
within the meaning of the Federal Reserve Act, and transactions between bank
subsidiaries of the Company and its affiliates are subject to certain
restrictions.  With certain exceptions, the Company and its subsidiaries also
are prohibited from tying the provision of certain services, such as extensions
of credit, to other services offered by the Company or its affiliates.

Banking regulations require bank holding companies and banks to maintain a
minimum "leverage ratio" of core capital to adjusted quarterly average total
assets of a least 3%.  In addition, banking regulators have adopted risk-based
capital guidelines under which risk percentages are assigned to various
categories of assets and off-balance sheet items to calculate a risk-adjusted
capital ratio.  Tier I capital generally consists of common shareholders'
equity (which does not include unrealized gains and losses on securities), less
goodwill and certain intangible assets, while Tier II capital includes the
allowance for loan losses and subordinated debt, both subject to certain
limitations.  Regulatory risk-based capital guidelines require Tier I capital
of 4% of risk-adjusted assets and minimum total capital ratio (combined Tier I
and Tier II) of 8%.  At December 31, 1996, the Company's leverage ratio was
10.62% compared with 7.72% at December 31, 1995.  The Company's Tier I and
total capital ratios were 12.81% and 13.79%, respectively, at December 31,
1996, compared with 9.10% and 10.95% at December 31, 1995.

BANKING SUBSIDIARY

Columbia Bank is a Washington state-chartered commercial bank, the deposits of
which are insured by the FDIC.  It is subject to regulation by the FDIC and the
Division.  Although Columbia Bank is not a member of the Federal Reserve
System, the Federal Reserve Board's supervisory authority over the Company can
also affect Columbia Bank.

Among other things, applicable federal and state statutes and regulations which
govern a bank's operations relate to minimum capital requirements, required
reserves against deposits, investments, loans, legal lending limits, mergers
and consolidations, borrowings, issuance of securities, payment of dividends,
establishment of branches and other aspects of its operations.  The Division
and the FDIC also have authority to prohibit banks under their supervision from
engaging in what they consider to be unsafe and unsound practices.

Columbia Bank is required to file periodic reports with the FDIC and the
Division and is subject to periodic examinations and evaluations by those
regulatory authorities.  Based upon such an evaluation, the regulators may
revalue the assets of an institution and require that it establish specific
reserves to compensate for the differences between the regulator-determined
value and the book value of such assets.  These examinations must be conducted
every 12 months, except that certain well-capitalized banks may be examined
every 18 months.  The FDIC and the Division may each accept the results of an
examination by the other in lieu of conducting an independent examination.





                                       15
<PAGE>   20
As a subsidiary of a bank holding company, Columbia Bank is subject to certain
restrictions in its dealings with the Company and with other companies that may
become affiliated with the Company.

Columbia Bank's deposits are insured by the FDIC through the Bank Insurance
Fund (the "BIF") and the Savings Association Insurance Fund (the "SAIF").
Prior to enactment of recent legislation and promulgation of regulations
thereunder, the FDIC's annual assessment rate for deposits ranged from 0.0% to
0.27% of insured deposits for the BIF and 0.23% to 0.31% of insured deposits
for the SAIF, depending on an institution's risk classification.  The recent
legislation was enacted to resolve the difference in rates between the two
funds.  Pursuant to this legislation, the FDIC adopted regulations lowering the
SAIF assessment rates to a range of 0.04% to 0.31% and then through application
of an adjustment factor further reducing SAIF assessment rates to an effective
range of 0.0% to 0.27%.  The FDIC has also proposed to maintain the BIF
assessment rate within a range of 0.0% and 0.27% of covered deposits.  These
rates essentially became effective October 1, 1996 for certain institutions,
such as Columbia Bank. The legislation also resulted in a one-time special
assessment of $612,000 for the Company.  The special assessment, which is tax
deductible, was recognized during the third quarter of 1996.  Moreover, the
legislation requires assessments on both SAIF and BIF members in order to
service bonds issued in connection with the government resolution of the
savings and loan crisis.  This assessment is not tied to an institution's risk
classification.  The FDIC has estimated that for the next three years beginning
on January 1, 1997 through December 31, 1999, an annual assessment of
approximately 0.064% of covered deposits and 0.013% of covered deposits will be
assessed upon SAIF- and BIF-insured deposits, respectively, and from January 1,
2000 through December 31, 2017, the assessment rate will be 0.024% of covered
deposits for all insured institutions.  If the deposit insurance funds are
merged on January 1, 1999 pursuant to the legislation, then the uniform
assessment rate to service the bonds will apply from that date forward.
Management anticipates that its total assessment rate for deposits deemed to be
SAIF-insured will be 0.064%  for the year 1997.  Management also anticipates
that its total assessment rate for BIF-insured deposits will be 0.013% for the
year 1997.  At December 31, 1996, approximately $169.8 million, or 34.4%, of
Columbia Bank's deposits were deemed to be SAIF-insured under the allocation
formula.

Other Regulatory Developments

Congress has enacted significant federal banking legislation in recent years.
Included in this legislation have been the Financial Institution Reform,
Recovery and Enforcement Act of 1989 ("FIRREA") and the Federal Deposit
Insurance Corporation Improvement Act of 1991 ("FDICIA").  FIRREA, among other
things, (i) created two deposit insurance pools within the FDIC; (ii) permitted
commercial banks that meet certain housing- related asset requirements to
secure advances and other financial services from local Federal Home Loan
Banks; (iii) restructured the federal regulatory agencies for savings
associations; and (iv) greatly enhanced the regulators' enforcement powers over
financial institutions and their affiliates.

FDICIA went substantially farther than FIRREA in establishing a more rigorous
regulatory environment.  Under FDICIA, regulatory authorities are required to
enact a number of new regulations, substantially all of which are now
effective.  These regulations include, among other things, (i) a new method for
calculating deposit insurance premiums based on risk, (ii) restrictions on
acceptance of brokered deposits except by well- capitalized institutions, (iii)
additional limitations on loans to executive officers and directors of banks,
(iv) the employment of interest rate risk in the calculation of risk-based
capital, (v) safety and soundness standards that take into consideration, among
other things, management, operations, asset quality, earnings and compensation,
(vi) a five-tiered rating system from well-capitalized to critically
undercapitalized, along with the prompt corrective action the agencies may take
depending on the category, and (vii) new disclosure and advertising
requirements with respect to interest paid on savings accounts.

FDICIA and regulations adopted by the FDIC impose additional requirements for
annual independent audits and reporting when a bank begins a fiscal year with
assets of $500 million or more.  Such banks, or their holding companies, are
also required to establish audit committees comprised of directors who are
independent of management.  The Company had $588.9 million in assets at
December 31, 1996, and thus became subject to the FDIC regulations on January
1, 1997.   The Bank has an Audit Committee of independent directors which meets
the audited financial statement requirements of applicable regulations.





                                       16
<PAGE>   21
Also, the Riegle-Neal Interstate Banking and Branching Efficiency Act of 1994
(the "Interstate Banking Act") provides banks with greater opportunities to
merge with other institutions and to open branches nationwide.  The Interstate
Banking Act also allows a bank holding company whose principal operations are
in one state to apply to the Federal Reserve for approval to acquire a bank
that is headquartered in a different state.  States cannot "opt out" but may
impose minimum time periods, not to exceed five years, for the target bank's
existence.

The Interstate Banking Act also allows bank subsidiaries of bank holding
companies to establish "agency" relationships with their depository institution
affiliates.  In an agency relationship, a bank can accept deposits, renew time
deposits, close and service loans, and receive payments for a depository
institution affiliate.  States cannot "opt out."

In addition, the Interstate Banking Act allows banks whose principal operations
are located in different states to apply to federal regulators to merge.  This
provision takes effect June 1, 1997, unless states enact laws to either (i)
authorize such transactions at an earlier date or (ii) prohibit such
transactions entirely.  The Interstate Banking Act also allows banks to apply
to establish de novo branches in states in which they do not already have a
branch office.  This provision takes effect June 1, 1997, but (i) states must
enact laws to permit such branching and (ii) a bank's primary federal regulator
must approve any such branch establishment.  The Washington legislature passed
legislation that allows, subject to certain conditions, mergers or other
combinations, relocations of banks' main office and branching across state
lines in advance of the June 1, 1997 date established by federal law.

Further effects on the Company may result from the Riegle Community Development
and Regulatory Improvement Act of 1994 (the "Community Development Act").  The
Community Development Act (i) establishes and funds institutions that are
focused on investing in economically distressed areas and (ii) streamlines the
procedures for certain transactions by financial institutions with federal
banking agencies.

Among other things, the Community Development Act requires the federal banking
agencies to (i) consider the burdens that are imposed on financial institutions
when new regulations are issued or new compliance burdens are created and (ii)
coordinate their examinations of financial institutions when more than one
agency is involved.  The Community Development Act also streamlines the
procedures for forming certain one-bank holding companies and engaging in
authorized non-banking activities.

In addition to the changes to the BIF and SAIF assessment rates implemented by
the legislation which was recently passed as part of the 1996 Omnibus spending
bill, various regulatory relief provisions were enacted.  The new legislation
includes, among other things, changes to (I) the Truth in Lending Act and the
Real Estate Settlement Procedures Act to coordinate and simplify the two laws'
disclosure requirements; (ii) eliminate civil liabiltity for violations of the
Truth in Savings Act after five years; and (iii) streamline the application
process for a number of bank holding company and bank applications; (iv)
establish a privilege from discovery in any civil or administrative proceeding
or bank examination for any fair lending self-test results conducted by, or on
behalf of, a financial institution in certain circumstances; (v) repeal the
FDICIA requirement that independent public accountants attest to compliance
with designated safety and soundness regulations; (vi) impose a continuous
regulatory review of regulations to identify and eliminate outdated and
unnecessary rules; and (vii) various other miscellaneous provisions to reduce
bank regulatory burden.

The foregoing is just a brief summary of certain important statutes and
regulations.  It is impossible to determine with any certainty the impact, both
operationally and financially, that enacted and proposed statutes and
regulations will have on the Company and its subsidiary.  Implementation of the
new regulations has resulted and will result in initial costs to financial
institutions.  In addition, many of the new regulations include additional
reporting requirements which will result in increased and recurring personnel
and other costs.





                                       17
<PAGE>   22
ITEM 2.  PROPERTIES

The Company's executive offices and the Main Office of Columbia Bank are
located in approximately 37,500 square feet of  leased space in downtown
Tacoma.  The lease of the downtown Tacoma office has an initial lease term of
seven years.  With an expiration of August 2000, the lease agreement provides
for one renewal option for three years and two additional renewal options for
five years each.  The base rent is approximately $34,000 per month for the
first five years, subject to certain increases for landlord operating expenses.
Beginning in the sixth year of the lease and at each five-year renewal date,
the base rent may be adjusted pursuant to a formula which limits the
adjustments to an average of 3% of the base rent per year or 15% of the base
rent over the five-year renewal term.  The downtown lease also includes
customer and employee parking spaces at rates at or below current market rates
for downtown parking.  As of December 31, 1996, Columbia Bank had 11 offices in
Pierce County, including the Main Office ( 8 leased and 3 owned), two offices
in Longview (both owned),  one office in Bellevue (leased), one office in
Federal Way (leased), and one office in Woodland (owned).   Commerce Plaza, one
of Columbia Bank's banking offices in Longview, houses a retail banking office
and numerous retail and other tenants.

For additional information pertaining to properties, see Note 7 of "Notes to
Consolidated Financial Statements" at page 49 of the Annual Report, which is
incorporated herein by reference.

ITEM 3.  LEGAL PROCEEDINGS

For information concerning legal proceedings, see Note 12 of "Notes to
Consolidated Financial Statements" at page 53 of the Annual Report, which is
incorporated herein by reference.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

None

                                    PART II

ITEM 5.  MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED STOCKHOLDER
         MATTERS

For information concerning the Company's common stock and related security
holder matters, see "Quarterly Common Stock Prices & Dividend Payments" at page
33 of the Annual Report, which is incorporated herein by reference.

ITEM 6.  SELECTED FINANCIAL DATA

For selected financial data concerning the Company, see "Consolidated
Highlights," "Consolidated Five-Year Statements of Operations" and
"Consolidated Five-Year Summary of Average Balances and Net Interest Revenue"
at pages 15, 60 and 62, respectively, of the Annual Report, which is
incorporated herein by reference.

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

For management's discussion and analysis, see "Consolidated Analysis of Changes
in Interest Income and Expense" in Part I of this report, "Management
Discussion and Analysis of Financial Condition and Results of Operations" at
pages 20 through 33 of the Annual Report and "Consolidated Five-Year Summary of
Average Balances and Net Interest Revenue" at page 62 of the Annual Report, all
of which are incorporated herein by reference.





                                       18
<PAGE>   23
ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

For consolidated financial statements of the Company, see "Audited Financial
Statements" beginning at page  36 of the Annual Report which is incorporated
herein by reference.  The "Summary of Quarterly Financial Information
(Unaudited)" on page 59 of the Annual Report is also incorporated herein by
reference.

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE

For information concerning a change in the Company's independent accountant ,
see "Recent Change in Accounting Firms" on page 33 of the Annual Report, which
is incorporated herein by reference.



                                    PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

Information concerning directors of the registrant is incorporated herein by
reference to the section entitled "Information With Respect to Nominees"
beginning at page 2 of the Company's definitive Proxy Statement dated March 20,
1997 (the "Proxy Statement") for the annual meeting of shareholders to be held
April 23, 1997.

The required information with respect to the executive officers of the Company
is included under the caption "Executive Officers of the Company" in Part I of
this report.  Part I of this report is incorporated herein by reference.

ITEM 11.  EXECUTIVE COMPENSATION

For information concerning executive compensation see "Executive Compensation"
beginning at page 6 of the Proxy Statement, which is incorporated herein by
reference.  Neither the Report of the Personnel and Compensation Committee on
Executive Compensation nor The Stock Performance Graph, both of which are
contained in the Proxy Statement, are incorporated by this reference.



ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

For information concerning security ownership of certain beneficial owners and
of management see "Information With Respect to Nominees" beginning at page 2
and 12 of the Proxy Statement, which is incorporated herein by reference.



ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

For information concerning certain relationships and related transactions, see
"Interest of Management in Certain Transactions" beginning at page 13 of the
Proxy Statement, which is incorporated herein by reference.





                                       19
<PAGE>   24
                                     PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

List of Financial Statements and Financial Statement Schedules.

(a)  (1)   Financial Statements:
           The following consolidated financial statements of the Company.,
           included in the Annual Report of the registrant to its shareholders
           for the year ended December 31, 1996, are incorporated by reference
           in Item 8:
<TABLE>
<CAPTION>
                                                                                                        Page
                                                                                                        ----
           <S>                                                                                           <C>
           Consolidated Statements of Operations--Years ended December 31, 1996, 1995 and 1994           36
           Consolidated Balance Sheets--December 31, 1996 and 1995                                       38
           Consolidated Statements of Shareholders' Equity--Years ended
              December 31, 1996, 1995 and 1994                                                           40
           Consolidated Statements of Cash Flows--Years ended December 31, 1996, 1995 and 1994           42
           Notes to Consolidated Financial Statements                                                    44
           Report of Independent Accountants                                                             35
</TABLE>

     (2)   Exhibits:
           See "Index to Exhibits" at page 23 of this Form 10-K.

(b)  Reports on Form 8-K:
     None





                                       20
<PAGE>   25





SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized, on the 24th day of March,
1997.
                                        Columbia Banking System, Inc.
                                        (Registrant)

                                        By     /s/ A. G. Espe
                                           ------------------------------
                                                    A. G. Espe
                                                   Chairman and
                                             Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
registrant and in the capacities indicated, on the 24th day of  March, 1997.

                                        Principal Executive Officer:


                                              /s/ A. G. Espe
                                        ------------------------------
                                                  A. G. Espe
                                                 Chairman and
                                           Chief Executive Officer
 

                                        Principal Financial Officer:


                                             /s/ Gary R. Schminkey
                                        ------------------------------
                                               Gary R. Schminkey
                                           Senior Vice President and
                                             Chief Financial Officer





                                       21
<PAGE>   26





A. G. Espe, pursuant to powers of attorney which are being filed with this
Annual Report on Form 10-K, has signed this report on March 24, 1997 as
attorney-in-fact for the following directors who constitute a majority of the
board of directors.



                W. Barry Connoley              Robert Quoidbach

                Richard S. DeVine              Donald Rodman

                Jack Fabulich                  Frank Russell

                Jonathan Fine                  Sidney R. Snyder

                Margel Gallagher               James M. Will, Jr.

                John A. Halleran





                                              /s/ A. G. Espe
                                        ------------------------------
                                                  A. G. Espe
                                               Attorney-in-fact
                                                March 24, 1997





                                       22
<PAGE>   27


INDEX TO EXHIBITS

Exhibit
  No.
- --------
3         (a)  Restated Articles of Incorporation of the Company. (1)

          (b)  Restated Bylaws of the Company. (4)

4         Form of Indenture. (1)

10        (a)  Lease dated May 7, 1993 between the Company and William B.
                 Swensen Enterprises for Tacoma Main Office
                 premises of Columbia Bank. (2)

          (b)  Amended Employee Stock Option Plan dated July 19, 1993. (2)

         *(c)  Amended Employment Agreement dated December 30, 1993 between the
                 Company and A. G. Espe. (3)

         *(d)  Amended Employment Agreement between the Company and A. G. Espe,
                 dated as of September 25, 1996, effective January 1, 1997. (6)

         *(e)  Amended Employment Agreement dated December 30, 1993 between the
                 Company and W. W. Philip, as further amended effective
                 December 29, 1995. (7)

         *(f)  Amended Employment Agreement between the Company and W. W.
                 Philip dated as of  September 25, 1996, effective January 1,
                 1997, except with respect to section 4.3 (granting restricted
                 stock award) which is immediately effective. (6)

          (g)  Agreement of September 30, 1994 with the Federal Deposit
                 Insurance Corporation regarding termination of the
                 Assistance Agreement dated August 2, 1988 among the Federal
                 Savings and Loan Insurance Corporation, Columbia Savings Bank
                 and the Company. The termination agreement also resulted in the
                 termination of the Regulatory Capital Maintenance Agreement
                 dated August 2, 1988 among the Company, Stanley B. Rose
                 Company, Stanley B. Rose, Columbia Savings Bank and the Federal
                 Savings and Loan Insurance Corporation. (4)

          (h)  Amended Agreement Granting Options to NorCap, Ltd. to Purchase
                 Shares of Common Stock of the Company dated September 26,
                 1990. (1)

          (i)  Cash or Deferred Profit Sharing Plan effective as of July 1,
                 1992. (2)

          (j)  Data processing servicing agreement dated May 3, 1993 between
                 the Company and M&I Data Services. (3)


11         Statement re computation of per share earnings.





                                       23
<PAGE>   28

13         The Company's Annual Report to Shareholders for the fiscal year
           ended December 31, 1996. (5)

21         Subsidiaries of the Company are:
             (a) Columbia State Bank, Tacoma, Washington, a Washington 
                 state-chartered commercial bank.

24         Powers of Attorney dated February 26, 1997.

         (1)     Incorporated by reference to the Form S-1 (Registration No.
                 33-47711) previously filed by the Company, declared
                 effective on June 16, 1992.

         (2)     Incorporated by reference to the Form SB-2 (Registration No.
                 33-66224) previously filed by the Company, declared
                 effective on August 16, 1993.

         (3)     Incorporated by reference to the Annual Report on Form 10-KSB
                 for the year ended December 31, 1993 previously
                 filed by the Company.

         (4)     Incorporated by reference to the Annual Report on Form 10-K
                 for the year ended December 31, 1994 previously
                 filed by the Company.

         (5)     Portions of the Annual Report to Shareholders have been
                 specifically incorporated by reference elsewhere in this
                 report.

         (6)     Incorporated by reference to the Form S-2 (Registration No.
                 333-14465) previously filed by the Company, declared
                 effective November 12, 1996.

         (7)     Incorporated by reference to the Annual Report on Form 10-K
                 for the year ended December 31, 1995 previously
                 filed by the Company.

         *       The listed documents are management contracts which contain
                 compensatory arrangements.





                                       24

<PAGE>   1



                                   EXHIBIT 11
<PAGE>   2




                                   EXHIBIT 11

                 STATEMENT RE COMPUTATION OF PER SHARE EARNINGS
                         COLUMBIA BANKING SYSTEM, INC.



<TABLE>
<S>                                                                    <C>          <C>          <C>
(in thousands, except per share data)                                   1996         1995          1994
- --------------------------------------------------------------------------------------------------------
EARNINGS
Net income (loss) applicable to common stock                           $3,577       $2,755        ($614)
Interest on convertible subordinated notes, net of
    income tax effects--Note 1
- --------------------------------------------------------------------------------------------------------
         Pro forma net income (loss) available to common stock         $3,577       $2,755        ($614)
========================================================================================================


SHARES
Weighted average number of common and common
    equivalent shares outstanding                                      3,866         3,496        3,481
Additional shares assuming conversion of convertible
    subordinated notes--Note 1
- --------------------------------------------------------------------------------------------------------
         Pro forma shares                                              3,866         3,496        3,481
========================================================================================================


         Fully diluted earnings (loss) per share                       $0.92         $0.79       ($0.18)
========================================================================================================
</TABLE>



Note 1.  Earnings (loss) per share and fully diluted earnings (loss) per share
are the same for the years ended December 31, 1995 and 1994.  The inclusion of
convertible subordinated notes would produce an antidilutive effect and
therefore have not been included in the above presentation.  Additional average
shares, assuming the conversion of convertible subordinated notes which are not
included, represent 243,011 and 246,619 shares for the years ended December 31,
1995 and 1994, respectively.  The related interest expense on these notes (net
of income tax effects) was $244,870 and $246,009 for the years ended December
31, 1995 and 1994, respectively.

On June 3, 1996, the Company gave notice that it would redeem all of its issued
and outstanding 7.85% Convertible Subordinated Notes (the "Notes") on August 1,
1996.  The Notes were convertible on whole or in part, in multiples of $1,000
principal amount, at 100% of the principal amount of the Note (or portion
thereof), at the conversion price per share of common stock of $10.56.  Prior
to August 1, 1996, all of the Notes were converted into 223,743 shares of
common stock.

For additional information on earnings per share, please see the "Capital"
section of the "Management Discussion and Analysis of Financial Condition and
Results of Operations" beginning at page 31 of the Annual Report, which is
incorporated herein by reference.






<PAGE>   1

                                                                 Exhibit 13




                   COLUMBIA BANKING SYSTEM 1996 ANNUAL REPORT

                                  [4 GRAPHICS]

                            COLUMBIA BANKING SYSTEM

                               1996 ANNUAL REPORT

                                  [2 GRAPHICS]

<PAGE>   2


PROFILE

Columbia Banking System, Inc. is a Tacoma, Washington-based bank holding company
which operates Columbia Bank, a state-chartered full-service commercial bank
with 17 banking offices in Pierce, King and Cowlitz counties. The cornerstone of
Columbia Bank's approach to banking is a return to friendly, old-fashioned
banking, coupled with modern convenience and technology. Columbia Bank is a
local bank, strongly committed to its customers and the communities it serves.
Columbia Banking System trades on The Nasdaq Stock Market under the symbol COLB.

Columbia Banking System achieved record results in 1996, thanks to a balanced
combination of strategy, skill, and opportunity. With growing assets, a
commitment to earn our customers' loyalty every day, and a market that continues
to benefit from the vacuum created by industry consolidation, 1997 represents
the opportunity for continued profitable growth.

<PAGE>   3

                                    CONTENTS

                     2               1996
                    16               letter to shareholders
                    19               financial review
                    64               corporate directory
                    65               shareholder information
                    66               branch locations

<PAGE>   4
Page 2


[Graphic display of the total assets of Columbia Banking System, Inc. at 
December 31, 1996]


                                  $588,916,000

<PAGE>   5

record growth


A MAJOR MILESTONE.



<TABLE>
<CAPTION>
           MEASURES
<S>        <C>
38.9%      average annual growth rate for total assets, 1992 - 1996

39.0%      average annual growth rate for total loans, 1992-1996

43.4%      average annual growth rate for total deposits, 1992-1996
</TABLE>


Think of it as more than a measure of success. Think of it as a measure of just
how much customers have come to value our personal approach to banking. In 1996
we crossed the one half-billion dollar mark in assets, increasing 38.5% from one
year ago. And we believe that there is plenty of room to grow.


<PAGE>   6



people and places


BANKS AROUND BANKERS.


<TABLE>
<CAPTION>
          MEASURES
<S>       <C>
15        years average in-market experience for our loan officers
14        years average in-market experience for our branch managers
17        branches total, up from 13 in 1995
</TABLE>


It's simple. Banks are best managed by bankers. We build our branch
network by first finding the right banker for the market, and then building
around their experience, skills and relationships with customers and the
community. And it works. After all, wouldn't you rather do business with a
banker you know?

<PAGE>   7
Page 5

[Photograph of four bank employees symbolizing the narrative on the preceeding
page #4]


<PAGE>   8
Page 6

[Graphic display of the side profile of a human head symbolizing the narrative
on page #7]
<PAGE>   9




complete service


CUSTOMERS FIRST.


SERVICES


    -      Columbia Financial Services - investing through a third party
           broker-dealer relationship

    -      Pronto - delivers mortgage closings within 10 days or less in most
           cases

    -      Save For America(TM) - government endorsed savings program for 
           students

Too often technology is being used to dehumanize banking and to keep
contact with customers to a minimum. While we're just as technologically
sophisticated as any other bank, we use technology to enhance our customer
relationships, not to replace them. In other words, we give our customers the
best of both worlds.


<PAGE>   10




customer focus


ALL TOGETHER NOW.


FOCUS


We are committed to our customers and our communities, offering a return to
friendly, old-fashioned banking, in addition to providing our customers with all
the modern conveniences and technology of banking today.

At Columbia, banking is what banking was. People who listen and respond. Who
work with our customers and see them as individuals instead of mere numbers.
This approach may be the single biggest reason for our record-setting growth.
Because, when you treat people as individuals, the word gets around.

<PAGE>   11
Page 9

Photograph of two sets of hands working together raising an American flag up a
flag pole symbolizing the narrative on the preceding page #8.

<PAGE>   12

Page 10


Graphic display of the mathematical function of "6 times" symbolizing the
narrative on page #11.


<PAGE>   13


high performance


WAY ABOVE AVERAGE.


<TABLE>
<CAPTION>
                MEASURES
<S>             <C>
31.3%           Total asset growth vs. 4.6% industry average*
27.6%           Total loan growth vs. 6.7% industry average*
33.4%           Total deposit growth vs. 4.2% industry average*
    *           Average based on all FDIC-insured institutions, 9-95 through
                9-96
</TABLE>

Not only compared to the county, or the state or the region. Compared to all the
FDIC-insured institutions, everywhere in the country. Our balance sheet growth
outpaced the industry average by an average of six times based on above
measures, while non-performing loans reached an all time low of 0.39 percent.

<PAGE>   14


continued growth

THE TIME IS NOW.

<TABLE>
<CAPTION>
                MEASURES
<S>             <C>
  29.8%         increase in net income
  26.3%         increase in loans
  36.3%         increase in deposits
</TABLE>

Combine our strategy, performance, skill and dedication to customers with a
marketplace that is looking for a better way to bank in the aftermath of
industry consolidation, and our window for growth is wide open. And that is
where our focus remains: making the most of our business and our opportunity.

<PAGE>   15
Page 13



Photograph of an eight-pane window with a view of blue sky and clouds
symbolizing the narrative on the preceding page #12


<PAGE>   16
Page 14


financial charts

<TABLE>
<CAPTION>
December 31,
(dollars in
thousands)          1992          1993          1994           1995           1996
- ------------        ----          ----          ----           ----           ----
<S>                <C>           <C>           <C>           <C>            <C>
Assets             158,694       235,944       319,072       $425,206       $588,916
Loans              120,797       181,016       268,996       $353,093       $446,095
Deposits           118,014       165,339       268,692       $361,875       $493,222
</TABLE>


<PAGE>   17
consolidated highlights

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
       DOLLARS IN THOUSANDS                                                          PERCENT
   EXCEPT PER SHARE AMOUNTS                       1996               1995             CHANGE
- -------------------------------------------------------------------------------------------------
<S>                                           <C>                <C>                       <C>
For the Year
Net interest income                           $    20,544        $    16,561               24.1%
Provision for loan losses                           1,420              1,250               13.6
Net income                                          3,577              2,755               29.8
Net income excluding SAIF
   special assessment                               4,189                                  52.1

Per Share:
Net income                                           0.93               0.79               17.7
Net income excluding SAIF
   special assessment                                1.09                                  38.0
Fully diluted net income                             0.92               0.79               16.5
Fully diluted net income excluding
   SAIF special assessment                           1.07                                  35.4
Book value                                          11.37               9.76               16.5

At Year-end
Assets                                            588,916            425,206               38.5
Loans                                             446,095            353,093               26.3
Deposits                                          493,222            361,875               36.3
Shareholders' equity                               58,960             31,967               84.4

Number of full-time
   equivalent employees                               247                201               22.9
Number of banking offices                              16                 13               23.1

Financial Ratios
Net interest margin                                  4.48%              4.78%
Return on average assets                             0.73               0.74
Return on average assets excluding SAIF
   special assessment                                0.86
Return on average equity                             9.68               9.25
Return on average equity excluding SAIF
   special assessment                               11.34
Average equity to average assets                     7.55               7.95
Risk-based capital ratios:
   Tier I capital                                   12.81               9.10
   Total capital                                    13.79              10.95
Leverage ratio                                      10.62               7.72
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    PAGE 15.

<PAGE>   18

TO OUR SHAREHOLDERS

Over the past several years, your Company has grown substantially while pursuing
aggressive strategies. We have focused on the rapid expansion of Columbia Bank
in order to establish a competitive presence in our markets. In the process, we
have experienced growth rates well above-average for the banking industry, and
have achieved strong earnings momentum.

<PAGE>   19


In 1996, our achievements were the result of successful implementation of our
business plan. Continuing to build your Company's solid foundation while
increasing the value of your investment remains our top priority.

         We sought to keep pace with market demand in 1996 through ongoing
development of our branch network, now numbering 17 branches in 3 counties.
Accordingly, Columbia Banking System's asset size has tripled since opening the
Tacoma Main Office in August 1993, entirely the result of internal growth.
Surpassing one-half billion dollars in total assets during the third quarter of
1996 marked an important milestone. This measure of success was realized earlier
than we had originally anticipated. As of December 31, 1996, your Company's
assets totaled $588.9 million.

         Our capital position supports our plan for continued growth. Completion
of a secondary equity offering of 1,445,000 shares of common stock during the
fourth quarter resulted in net proceeds of approximately $21 million. Of this
amount, $10 million was contributed to the capital of Columbia Bank to finance
further expansion in Pierce County, and, over the next several years, north into
King County and south into Thurston County. Additionally, $3 million was used to
repay a borrowing, and $8 million will be used for general corporate purposes.

         As your Company grows in size, we are also pleased to report consistent
growth in earnings, in spite of major investments in our expansion. Net income
for 1996 was $3.6 million, a 30% increase from $2.8 million for 1995. On a per
share basis, earnings were $0.93 for 1996 compared with $0.79 for 1995. In the
third quarter, federal legislation designed to recapitalize the Savings
Association Insurance Fund (SAIF) resulted in a one-time charge to earnings. If
not for this SAIF special assessment, 1996 net income would have been $4.2
million, or $1.09 per share, up 52% from the prior year.

          Our approach to the business of banking is what sets us apart from our
competitors. We believe that banking is a people business. This philosophy is
what drives our organization, from back-room operations to front-line
management, and it is what sets us apart from the mega-bank mentality. Our
strategy is to provide our customers with the sophisticated systems and products
of a regional bank while offering the superior service of a locally-managed
community bank. Relationship banking and personal attention to detail make the
difference.

         There are a number of factors influencing the successful implementation
of our strategy. First of all, Columbia Bank's knowledgeable management team has
considerable depth of experience: the average banking experience in market is 15
years for our loan officers and 14 years for our branch officers. Secondly,
potential expansion opportunities are determined by our ability to hire the
right banker to serve each community. We call it "building banks around
bankers." The right people working together as a team is paramount to our rapid
accumulation of loans and deposits and timely capture of market share.

         Additionally, we're benefiting from a market supportive of our banking
style. Well-received in the areas in which we operate, we provide an alternative
to the impersonal out-of-state financial institutions dominating western
Washington's banking industry. We appeal to customers disillusioned by
large-scale bank consolidations and the inconveniences associated with computer
conversions, product changes and staff turnover. Our decentralized management
system gives us the flexibility to provide prompt, local decision-making and to
manage customer relationships with a superior quality of service.

         Although we have grown rapidly, we remain focused on maintaining sound
asset quality while building a diversified loan portfolio. In 1996, we
deemphasized commercial real estate lending activity in order to lessen our risk
profile and to concentrate on meeting strong demand for lower-risk commercial
business loans. We are also in the process of selling our VISA(R) credit card
loans which will devote more resources to our commercial portfolio.

         Our future plans involve continued expansion in Pierce County and
gradually north and south along the I-5 corridor in western Washington (see map
on page 66). Having just opened a second Bellevue branch in February, and a new
branch in Kent later this month, both in King County, we expect to open our
Westgate office in north Tacoma later this year, and we have regulatory approval
for branches in the Stadium and Lincoln districts of Tacoma.


<PAGE>   20


         With a strong, well-diversified economy, Washington ranks among the top
ten states in the nation in terms of both population and job growth. In
accordance with our growth objectives for Columbia Bank, the Puget Sound Region
made up of Pierce, King and Thurston counties is projected to expand at nearly
twice the national rate through the end of this century.

         An important factor to our competitive position is our commitment to
technological advancement while keeping our primary focus on the personal
aspects of banking. Our product and service mix matches that of most multi-state
financial institutions. However, more and more we're seeing an industry trend
toward automation which is replacing front-line people. Our customers like to
work with people, but they also like to have the choice of up-to-date products,
systems, services and conveniences. We'll continue to provide both because
that's what customers want.

         We note with sadness the passing of Columbia Banking System Director
Emeritus Stanley B. Rose in July 1996. As one of your Company's original Board
members, Mr. Rose was a staunch supporter of this organization since its
beginning. He will be greatly missed.

         In closing, it is our distinctive business style and our prospects for
ongoing growth which reinforce the value of Columbia Banking System. 1996 was a
great year, and we're meeting future challenges with the same enthusiasm and
energy that has created strong performance so far. We thank our employees,
shareholders and customers, all of whom have contributed to our success.


              [Photograph of Chairman and Chief Executive Officer,
         A. G. Espe sitting, and President and Chief Operating Officer,
                             W. W. Phillip Standing]

                  /s/ W. W. Philip                 /s/ A. G. Espe
                  ------------------             ---------------------


                  W. W. PHILIP                   A. G. ESPE
                  President and                  Chairman and
                  Chief Operating Officer        Chief Executive Officer



                                  MARCH 1, 1997



                                    Page 18.

<PAGE>   21
financial review

                 20   management discussion and analysis of financial condition
                      and results of operations
                 34   report of management
                 35   report of independent accountants



audited financial statements

                 36   consolidated statements of operations
                 38   consolidated balance sheets
                 40   consolidated statements of shareholders' equity
                 42   consolidated statements of cash flows
                 44   notes to consolidated financial statements


supplemental financial data (unaudited)

                 59   summary of quarterly financial information
                 60   consolidated five-year statements of operations
                 62   consolidated five-year summary of average balances and net
                      interest revenue



<PAGE>   22


management discussion and analysis of financial condition and results of
operations


This discussion should be read in conjunction with the consolidated financial
statements of Columbia Banking System, Inc. (the "Company") and notes thereto
presented elsewhere in this report. In the following discussion, unless
otherwise noted, references to increases or decreases in average balances in
items of income and expense for a particular period and balances at a particular
date refer to the comparison with corresponding amounts for the period or date
one year earlier.

Overview

Columbia Banking System, Inc., a Washington corporation, is a registered bank
holding company whose wholly owned subsidiary, Columbia State Bank ("Columbia
Bank"), conducts a full-service commercial banking business. Headquartered in
Tacoma, Washington, the Company serves small and medium-sized businesses,
professionals and other individuals through 16 banking offices located in the
Tacoma metropolitan area and contiguous parts of the Puget Sound region of
Washington, as well as the Longview and Woodland communities in southwestern
Washington. At December 31, 1996, based on total assets of $588.9 million, the
Company was the largest publicly traded bank holding company headquartered in
Washington engaged primarily in commercial banking.

          In 1993, the Company reorganized in preparation for its aggressive
expansion in Tacoma-Pierce County, and raised approximately $17.2 million in net
proceeds in a public offering of common stock. Columbia Bank then began a rapid
expansion in order to take advantage of opportunities resulting from increased
consolidation of banks in the Company's principal market area, primarily through
acquisitions by out-of-state holding companies, and the resulting dislocation of
customers. Management believes this industry consolidation has created
significant gaps in the ability of large banks operating in Washington to serve
certain customers, particularly the Company's target customer base of small and
medium-sized businesses, professionals and other individuals.

         The business strategy of the Company is to provide its customers with
the financial sophistication and breadth of products of a regional bank while
retaining the appeal and service level of a community bank. Management believes
that as a result of the Company's strong commitment to highly personalized
relationship-oriented customer service, its varied products, its strategic
branch locations and the long-standing community presence of its managers,
lending officers and branch personnel, it is well positioned to attract new
customers and to increase its market share of loans and deposits.

         Since its reorganization, the Company has experienced rapid growth and
has greatly expanded its commercial lending activities. The Company has grown
from four banking offices at January 1, 1993 to its present sixteen banking
offices, and currently has regulatory approval to open four additional banking
offices. From January 1, 1993 to December 31, 1996, the Company increased its
consolidated assets from $158.7 million to $588.9 million, its loans from $120.8
million to $446.1 million and its deposits from $118.0 million to $493.2
million. While experiencing this growth, the Company's asset quality, measured
by total nonperforming assets as a percentage of total assets, has improved. At
December 31, 1996, the Company's nonperforming assets constituted 0.39% of total
assets, as compared to 0.89%, 1.17%, and 2.13% at December 31, 1995, 1994 and
1993, respectively. Although the Company incurred anticipated losses in the four
quarters


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 20.
<PAGE>   23


following its 1993 reorganization, the Company has been profitable in each of
the last ten consecutive quarters beginning with the third quarter 1994.

         The Company's goal is to create, over the next several years, a
well-capitalized, customer focused, Pacific Northwest commercial banking
institution with a significant presence in selected markets and total assets in
excess of $1.0 billion. The Company intends to effect this growth strategy
through a combination of growth at existing branch offices, new branch openings
(coupled with the hiring of an experienced branch manager and/or lending officer
with strong community ties and banking relationships) and acquisitions. In
particular, the Company anticipates continued expansion in Pierce County, north
into King County (the location of Seattle and Bellevue) and south into Thurston
County (the location of the state capital, Olympia). In order to fund its
commercial and consumer lending activities and to allow for increased contact
with customers, the Company is establishing a branch system catering primarily
to retail depositors, supplemented by business banking customer deposits and
other borrowings. The Company believes this mix of funding sources will enable
it to expand its commercial lending activities rapidly while attracting a stable
core deposit base.

         In order to support its growth strategy, without compromising its
personalized banking approach or its commitment to asset quality, the Company
has made significant investments in experienced branch, lending and
administrative personnel and has incurred significant costs related to branch
expansion. Although the Company's expense ratios have improved since 1993,
management anticipates that the ratios will remain relatively high by industry
standards for the foreseeable future due to the Company's aggressive growth and
emphasis on convenience and personal service.

         The economy of the Company's principal market area, while primarily
dependent upon aerospace, foreign trade and natural resources, including
agriculture and timber, has become more diversified over the past decade as a
result of the success of software companies such as Microsoft and the
establishment of numerous research and biotechnology firms. The economies of
Washington and the Puget Sound region generally have experienced moderate growth
and stability in recent years. Pierce County is projected to have the strongest
economic performance in the Puget Sound region through 1999 according to the
Puget Sound Economic Forecaster, a regional publication providing economic
forecasts and commentary. According to the same publication, the greater Puget
Sound economy is projected to expand at nearly twice the national rate for the
years 1997 through 1999.

         In November and December 1996, the Company issued 1.445 million shares
of common stock in a public offering, raising approximately $20.7 million in new
capital. The Company contributed approximately $10.0 million of these proceeds
to Columbia Bank primarily to fund additional expansion in Pierce County, and,
over the next several years, into south King and Thurston Counties. The
remainder was used to repay a $3.0 million borrowing and for general corporate
purposes.

         In November of 1996, the Gig Harbor branch moved into a new, permanent,
full service facility. During the second quarter of 1996 a new branch in
Spanaway opened in a temporary facility. Also, in September and December, two
new branches were opened in Puyallup and Edgewood/Milton. Columbia Bank has
opened 12 branch locations since beginning its major Pierce County expansion in
August 1993, and the Company currently has regulatory approval to open three
additional branches in Pierce County and one in King County. During 1997, the
Company anticipates the establishment of new branches and the relocation of the
Spanaway branch from a temporary to a permanent facility. New branches normally
do not contribute to net income for many months after opening.

         In addition to the ongoing expansion of its branch network, the Company
has added new products and services to give its customers more banking options
and to keep current with industry trends and technology. During the second
quarter of 1996, Columbia Bank introduced "Columbia Free Checking," with no
monthly fee, no minimum balance, no per-check charges and free use of any ATM in
Washington state (exclusive of surcharges assessed by other financial
institutions). Columbia Bank also launched "Columbia Financial Services," an
alternative investments department which makes available mutual funds,
annuities, and other investment products through a contractual arrangement with
PrimeVest Financial Services, Inc.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 21.

<PAGE>   24


Results of Operations

The results of operations of the Company are dependent to a large degree on the
Company's net interest income. The Company also generates noninterest income
through service charges and fees and income from mortgage banking operations.
The Company's operating expenses consist primarily of compensation and employee
benefit expense and occupancy expense. Like most financial institutions, the
Company's interest income and cost of funds are affected significantly by
general economic conditions, particularly changes in market interest rates, and
by government policies and actions of regulatory authorities.

         For 1996, the Company recorded net income of $3.6 million, compared
with net income of $2.8 million in 1995 and a net loss of $614,000 in 1994. Net
income per share amounted to $0.93 in 1996, compared with $0.79 per share in
1995 and a net loss per share of $0.18 in 1994. Excluding a one-time special
assessment on SAIF-insured deposits of $612,000 recorded in the third quarter of
1996, (see Note 15 to consolidated financial statements), net income for 1996
would have been $4.2 million, or $1.09 per share. The increase in net income in
1996 was primarily due to increased revenue from continued loan and deposit
growth. Additionally, the Company continued to benefit from utilization of its
net operating loss carryforwards for federal income tax purposes and therefore,
the Company had no federal income tax provision for the year ended December 31,
1996. Had earnings been fully taxable, net income would have been $2.4 million,
or $0.61 per share.

Net Interest Income

Net interest income increased $4.0 million, or 24%, in 1996 compared with $5.0
million, or 43%, in 1995. The 1996 increase in net interest income was largely
due to the overall growth of the Company. Net interest income was favorably
affected by average interest-earning assets increasing more rapidly than average
interest-bearing liabilities, with the difference funded by noninterest-bearing
deposits and shareholders' equity. Average interest-earning assets increased
$111.4 million and $91.8 million in 1996 and 1995, respectively, while average
interest-bearing liabilities increased only $87.9 million and $77.7 million,
respectively.

         Net interest margin (net interest income divided by average
interest-earning assets) decreased to 4.48% for 1996, compared with 4.78% in
1995 and 4.54% in 1994. The decrease in net interest margin was primarily the
result of reduced spreads on earning assets. While interest-earning assets grew
during fiscal year 1996, the average yield on interest-earning assets decreased
to 8.53%, from 9.15% in fiscal year 1995. In comparison, the average cost of
interest-bearing liabilities decreased to 4.77% in 1996, from 5.05% in 1995. The
decrease in net interest margin was primarily due to lower yields obtained on
loans as a result of a planned change in loan mix from higher yielding
commercial real estate loans to high quality but lower yielding commercial
loans, and to increased competition in the Company's market area. Also affecting
net interest margin was a one-time adjustment to the amortization of deferred
loan origination fees during the third quarter of 1996, amounting to
approximately $100,000.

Provision for Loan Losses

For the years ended December 31, 1996, 1995 and 1994, net loan charge-offs
amounted to $664,000, $213,000 and $281,000, respectively. The Company's
provision for loan losses was $1.4 million for 1996, compared with $1.3 million
for 1995 and $1.0 million for 1994. During 1996, the allowance for loan losses
increased by $756,000 to 1.01% of loans (excluding loans held for sale) at
December 31, 1996 as compared with 1.06% and 1.01% of loans at December 31, 1995
and 1994, respectively.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 22.
<PAGE>   25
Noninterest Income

Total noninterest income increased $1.3 million, or 33.0% in 1996, and $995,000,
or 33.2% in 1995. Increases in noninterest income during 1996 were made up of
account service charges, bank card revenue, and mortgage banking income.

Noninterest Expense

Excluding the SAIF special assessment during the third quarter, total
noninterest expense increased $3.7 million, or 22.3%, in 1996, and $2.5 million,
or 17.9% in 1995. The increase was primarily due to personnel and occupancy
costs associated with the Company's expansion as well as bank card, data
processing and other expenses. Total noninterest expense was 78.3% of adjusted
revenue (the sum of net interest income plus noninterest income, less
nonrecurring items) for 1996 compared with 80.5% and 96.3% for 1995 and 1994,
respectively. The portion of compensation expense related to loan originations
is deferred and deducted from interest income over the life of the related
loans. Other categories of expense are volume driven and reflect the Company's
rapid growth. Total noninterest expense for the Company is expected to decline
in relation to revenues as the Company's asset base grows. Regulatory
assessments increased $612,000 in the third quarter of 1996 due to a one-time
special assessment, required by recently enacted legislation, to recapitalize
the SAIF fund of the FDIC (see Note 15 to consolidated financial statements).
Management is currently evaluating a proposed sale of Columbia Bank's credit
card portfolio which, if consummated, will result in a one-time gain. The sale
of the bank card business is not expected to have a material effect on results
of operations in future periods.

    Set forth below is a schedule showing additional detail concerning increases
and decreases in the Company's noninterest expense.

<TABLE>
<CAPTION>
           in thousands                               Increase/                     Increase/
year ended December 31,                   1996       (Decrease)        1995        (Decrease)        1994
                                        --------      --------       --------       --------       --------
<S>                                     <C>           <C>            <C>            <C>            <C>     
Compensation and employee benefits      $ 10,737      $  2,310       $  8,427       $  1,339       $  7,088
   Less: loan origination costs            2,300         1,212          1,088            219            869
Net compensation and
   employee benefits (as reported)         8,437         1,098          7,339          1,120          6,219
Occupancy                                  3,388           543          2,845             43          2,802
Professional services                        574           138            436              9            427
Advertising and promotion                    772           138            634            126            508
Printing and supplies                        414            39            375            (22)           397
Regulatory assessments                       323          (159)           482              7            475
Data processing                              807           192            615            152            463
Gains on real estate owned                                 400           (400)           (86)          (314)
Telephone and network                        338            67            271            (49)           320
Postage and delivery                         297            74            223             76            147
ATM network                                  176           125             51            (21)            72
Bank card                                  1,473           454          1,019            346            673
Taxes, licenses and fees                     659           (52)           711            386            325
Other                                      2,585           639          1,946            424          1,522
SAIF special assessment                      612           612
                                        --------      --------       --------       --------       --------
      Total noninterest expense         $ 20,855      $  4,308       $ 16,547       $  2,511       $ 14,036
                                        ========      ========       ========       ========       ========
</TABLE>

    In February 1996, the Company recorded a loss of $41,000 on the sale of its
only "real estate owned" property. Also, in March 1996, the Company recorded a
loss of $38,000 on a branch real estate transaction. In June 1996, the Company
wrote off $135,000 due to the abandonment of a potential branch site.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 23
<PAGE>   26

Lending Activities

The Company originates a wide variety of loans. Consistent with the trend begun
in 1993, the Company continues to increase commercial business loans as a
percentage of its total loan portfolio. The Company also emphasizes its private
banking services to high income and high net worth individuals.

Loan Portfolio

The following table sets forth at the dates indicated the Company's loan
portfolio by type of loan:

<TABLE>
<CAPTION>
in thousands                                                   % of                             % of
December 31,                                   1996            Total            1995            Total
                                             ---------       ---------        ---------       ---------
<S>                                          <C>                 <C>          <C>                 <C>   
Commercial business                          $ 169,318            38.0%       $ 113,775            32.2%
Real estate:
   One- to four-family residential              67,709            15.1           67,991            19.3
   Five or more family residential
      and commercial properties                128,803            28.9           97,103            27.5
                                             ---------       ---------        ---------       ---------
         Total real estate                     196,512            44.0          165,094            46.8
Real estate construction:
   One- to four-family residential              21,380             4.8           22,741             6.5
   Five or more family residential
      and commercial properties                 10,680             2.4            8,884             2.5
                                             ---------       ---------        ---------       ---------
         Total real estate construction         32,060             7.2           31,625             9.0
Consumer                                        48,807            10.9           43,343            12.2
                                             ---------       ---------        ---------       ---------
   Subtotal                                    446,697           100.1          353,837           100.2
Less deferred loan fees and other                 (602)           (0.1)            (744)           (0.2)
                                             ---------       ---------        ---------       ---------
   Total loans                               $ 446,095           100.0%       $ 353,093           100.0%
                                             =========       =========        =========       =========
Loans held for sale                          $  11,341                        $   1,367
                                             =========       =========        =========       =========
</TABLE>

Total loans at year end increased $93.0 million, or 26.3%, from year end 1995.
All loan categories except for one-to four-family loans contributed
significantly to the increase.

Commercial and Private Banking Lending

Commercial loans increased to $169.3 million at December 31, 1996, representing
38.0% of total loans, from $113.8 million at December 31, 1995. This increase
reflects management's commitment to provide competitive commercial lending in
the Company's primary market area. The Company expects to continue to expand


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 24
<PAGE>   27

its commercial lending products and emphasize, in particular, its relationship
banking with businesses, business owners and professional individuals.

Real Estate Lending

One- to Four-Family Residential Real Estate Lending  Residential one- to
four-family loans amounted to $67.7 million at December 31, 1996, representing
15.1% of total loans, compared with $68.0 million at December 31, 1995. These
loans are used by the Company to collateralize advances from the Federal Home
Loan Bank of Seattle (the "FHLB"). The Company's underwriting standards require
that one- to four-family portfolio loans generally be owner-occupied and that
loan amounts not exceed 80% (90% with private mortgage insurance) of the
appraised value or cost, whichever is lower, of the underlying collateral at
origination. Generally, management's policy is to originate for sale to third
parties residential loans secured by properties located within the Company's
primary market areas.

Multi-family and Commercial Real Estate Lending  The Company makes multi-family
and commercial real estate loans in its primary market areas. Multi-family and
commercial real estate lending increased to $128.8 million at December 31, 1996,
representing 28.9% of total loans, from $97.1 million at December 31, 1995. The
Company's underwriting standards generally require that the loan-to-value ratio
for multi-family and commercial loans not exceed 75% of appraised value or cost,
whichever is lower, and that commercial properties maintain debt coverage ratios
(net operating income divided by annual debt servicing) of 1.2 or better.

Construction Loans

The Company originates one- to four-family residential construction loans for
the construction of custom homes (where the home buyer is the borrower) and
provides financing to builders for the construction of pre-sold homes and
speculative residential construction. The Company endeavors to limit its
construction lending risk through adherence to strict underwriting procedures.
Construction loans on one- to four-family residences decreased to $21.4 million
at December 31, 1996, representing 4.8% of total loans, from $22.7 million at
December 31, 1995.

Consumer Lending

At December 31, 1996, the Company had $48.8 million of consumer loans
outstanding, representing 10.9% of total loans, as compared with $43.3 million
at December 31, 1995. Consumer loans made by the Company include automobile
loans, boat and recreational vehicle financing, home equity and home improvement
loans and miscellaneous personal loans. Excluded from the $48.8 million at
December 31, 1996 are $7.3 million of bank card loans that have been transferred
to "Loans Held For Sale," due to a pending transaction for the sale of all bank
card loans. The corresponding balance of consumer loans at December 31, 1995,
excluding bank card loans, would have been $37.3 million which translates into
an $11.5 million, or 30.8% increase in consumer loans for 1996.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 25
<PAGE>   28
At December 31, 1996, the Company had no foreign loans or loans related to
highly leveraged transactions.

Management's growth strategy has concentrated on the Tacoma/Pierce County
market. The results of that strategy are evident in the following summary of
loans:

<TABLE>
<CAPTION>
in thousands                                                    Increase
December 31,                     1996          1995        Amount       Percent
                             --------      --------      --------      --------
<S>                          <C>           <C>           <C>               <C>  
Pierce County                $324,132      $238,763      $ 85,369          35.8%
All other counties            121,963       114,330         7,633           6.7
                             --------      --------      --------      --------
   Total                     $446,095      $353,093      $ 93,002          26.3%
                             --------      --------      --------      --------
</TABLE>

Nonperforming Assets

Nonperforming assets consist of nonaccrual loans, restructured loans and real
estate owned. The following tables set forth, at the dates indicated,
information with respect to nonaccrual loans, restructured loans, total
nonperforming loans (nonaccrual loans plus restructured loans), real estate
owned and total nonperforming assets of the Company:

<TABLE>
<CAPTION>
in thousands
December 31,                                     1996         1995         1994
                                               ------       ------       ------
<S>                                            <C>          <C>          <C>   
Nonaccrual:
   One-to four-family residential              $1,645       $  329       $  299
   Commercial business                            385           86          143
   Consumer                                       197           20           10
                                               ------       ------       ------
      Total                                     2,227          435          452
Restructured:
   One-to four-family residential                  25           29           44
                                               ------       ------       ------
      Total nonperforming loans                $2,252       $  464       $  496
                                               ======       ======       ======
Real estate owned                                  40        3,304        3,227
                                               ------       ------       ------
      Total nonperforming assets               $2,292       $3,768       $3,723
                                               ======       ======       ======
Accruing loans past-due 90 days or more                     $  152       $   82
Potential problem loans                        $  213           37           23
Allowance for loan losses                       4,504        3,748        2,711
Nonperforming loans to loans                     0.50%        0.13%        0.18%
Allowance for loan losses to loans               1.01         1.06         1.01
Nonperforming assets to total assets             0.39         0.89         1.17
                                               ------       ------       ------
</TABLE>

    The consolidated financial statements are prepared according to the accrual
basis of accounting. This includes the recognition of interest income on the
loan portfolio, unless a loan is placed on a nonaccrual basis, which occurs when
there are serious doubts about the collectibility of principal or interest.
Generally, the Company's policy is to place a loan on nonaccrual status when the
loan is past due 90 days. Restructured loans are those for which concessions
have been granted due to the borrower's weakened financial condition. This
includes the reduction of interest rates below a rate otherwise available to
that borrower, or the deferral of interest or principal. Interest on
restructured loans is accrued at the restructured rates when it is anticipated
that no loss of original principal will occur.

    Potential problem loans are loans which are currently performing and are not
included in nonaccrual or restructured loans above, but about which there are
serious doubts as to the borrower's ability to comply with present repayment
terms. Therefore, these loans will likely be included later in nonaccrual, past
due or restructured loans and are considered by management in assessing the
adequacy of the allowance for loan losses.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 26.
<PAGE>   29

    Nonperforming loans increased to $2.3 million at December 31, 1996 from
$464,000 at December 31, 1995 due principally to the inclusion of loans which,
though nonperforming, are secured by real estate. Management anticipates some
charge-offs of those unsecured or undersecured nonperforming loans, although the
amount of such charge-offs is not expected to be material. At December 31, 1996,
nonperforming loans were 0.50% of period-end loans (excluding loans held for
sale). In February 1996, the Company sold all of its "real estate owned" (which
consisted of one property in the state of Washington), thus reducing total
nonperforming assets to $2.3 million, or 0.39% of total assets at December 31,
1996, from $3.8 million, or 0.89% of total assets at year-end 1995.

Provision and Allowance for Loan Losses

The allowance for loan losses is maintained at a level considered by management
to be adequate to provide for anticipated loan losses based on management's
assessment of various factors affecting the loan portfolio. This includes a
review of problem loans, business conditions and loss experience, and overall
evaluation of the quality of the underlying collateral, holding and disposal
costs and costs of capital. The allowance is increased by provisions charged to
operations, and is reduced by loans charged off, net of recoveries.

    While management believes it uses the best information available to
determine the allowance for loan losses, unforeseen market conditions could
result in adjustments to the allowance for loan losses, and net income could be
significantly affected, if circumstances differ substantially from the
assumptions used in determining the allowance.

    The allowance for loan losses at December 31, 1996 decreased to 1.01%, from
1.06% of loans at December 31, 1995 (excluding loans held for sale at each
date). The decrease was due to a $421,000 increase in charge-offs compared with
1995, and a $93.0 million, or 26.3%, increase in loans since year-end 1995. For
the years ended December 31, 1996, 1995 and 1994, net loan charge-offs amounted
to $664,000, $213,000 and $281,000, respectively. The Company's provision for
loan losses was $1.4 million for 1996, compared with $1.3 million for 1995 and
$1.0 million for 1994.

    The following table summarizes the changes in the allowance for loan losses:

<TABLE>
<CAPTION>
in thousands
December 31,                                             1996             1995             1994
                                                    ---------        ---------        ---------
<S>                                                 <C>              <C>              <C>      
Total loans, net at end of period(1)                $ 446,095        $ 353,093        $ 268,996
Daily average loans                                   405,131          318,039          222,236
Beginning balance of allowance for loan losses          3,748            2,711            1,992
Charge-offs:
   Commercial business                                   (514)            (148)            (258)
   Consumer                                              (170)            (115)            (106)
                                                    ---------        ---------        ---------
      Total charge-offs                                  (684)            (263)            (364)
Recoveries:
   Commercial business                                     17               45               83
   Consumer                                                 3                5
                                                    ---------        ---------        ---------
      Total recoveries                                     20               50               83
                                                    ---------        ---------        ---------
         Net charge-offs                                 (664)            (213)            (281)
Provision charged to expense                            1,420            1,250            1,000
                                                    ---------        ---------        ---------
Ending balance                                      $   4,504        $   3,748        $   2,711
                                                    =========        =========         ======== 
Ratio of net charge-offs during period
   to average loans outstanding                          0.16%            0.07%            0.13%
                                                    =========        =========         ========            
</TABLE>

(1) Excludes loans held for sale


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 27.
<PAGE>   30

Securities

The Company's securities (securities available for sale) increased by $22.8
million to $45.5 million from year end 1995 to year end 1996. The investment
portfolio is comprised primarily of U.S. Treasury and government agency
securities. The average maturity of the securities portfolio was 2 years, 6
months at December 31, 1996. In November 1995, the Financial Accounting
Standards Board ("FASB") issued a Special Report permitting a one-time
opportunity for institutions to reassess the appropriateness of the designations
of all securities. Accordingly, in December 1995, the Company reclassified all
"investment securities" as "securities available for sale." For further
information on investment securities, including gross unrealized gains and
losses in the portfolio and gross realized gains and losses on sales of
securities, see Note 4 to the consolidated financial statements.

Premises and Equipment

In 1996, fixed assets increased $1.5 million, or 11.0% from 1995. The net change
includes purchases of $4.8 million, disposals of $1.5 million and depreciation
expense of $1.8 million. The Company's capital expenditures in 1997 are
anticipated to be approximately $5.3 million. Such expenditures are expected to
include approximately $4.1 million for new buildings and for remodeling existing
structures, and $1.2 million for new furniture and equipment.

Liquidity and Sources of Funds

The Company's primary sources of funds are customer deposits and advances from
the FHLB. These funds, together with loan repayments, loan sales, retained
earnings, equity and other borrowed funds, are used to make loans, to acquire
securities and other assets, and to fund continuing operations.

Deposit Activities  The Company experienced overall average deposit growth of
31.4% and 42.2% in 1996 and 1995, respectively. All categories of deposits
increased during both years, except for savings accounts which decreased 11.7%
and 27.7% in 1996 and 1995, respectively. Interest-bearing and
noninterest-bearing demand deposits increased 78.3% and 43.9% in 1996, and
104.6% and 60.7% in 1995, respectively.

    Average deposits are summarized in the following table:

<TABLE>
<CAPTION>
            in thousands
years ended December 31,                        1996          1995          1994
                                            --------      --------      --------
<S>                                         <C>           <C>           <C>     
Demand and other noninterest-bearing        $ 60,691      $ 42,167      $ 26,238
Interest-bearing demand                      142,103        79,706        38,962
Savings                                       21,673        24,547        33,938
Certificates of deposit                      189,122       168,351       122,198
                                            --------      --------      --------
Total average deposits                      $413,589      $314,771      $221,336
                                            ========      ========      ========
</TABLE>

    The Company is establishing a branch system catering primarily to retail
depositors, supplemented by business banking customer deposits and other
borrowings. While that stable core deposit base is being established,
management's strategy for funding growth has been to make use of brokered and
other wholesale deposits. The Company's use of brokered and other wholesale
deposits decreased in 1996, though management anticipates continued use of such
deposits to fund increasing loan demand. However, management anticipates use of
brokered deposits will decrease over time as a percent of total deposits. The
deposit increase of $131.3 million during 1996 occurred entirely in "core
deposits." Brokered and other wholesale deposits (excluding public deposits)
decreased $18.0 million to $30.3 million, or 6.1% of total deposits at December
31, 1996, from $48.3 million, or 13.3% of total deposits at December 31, 1995.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 28.
<PAGE>   31
Brokered and other wholesale deposits are summarized below. The average interest
rate for these deposits was 5.63% and 5.94% at December 31, 1996 and 1995,
respectively.

<TABLE>
<CAPTION>
in thousands
December 31,                              1996                       1995
                                                     Percent                    Percent
                                                    of Total                   of Total
                                        Amount      Deposits       Amount      Deposits
                                       -------      -------       -------      -------
<S>                                    <C>          <C>           <C>          <C>  
Maturing within one year               $28,863          5.8%      $41,546         11.5%
Maturing after one year but
   within three years                    1,387          0.3         5,633          1.5
Maturing after three years
   but within ten years                                             1,091          0.3
                                       -------      -------       -------      -------
      Total brokered and other
         wholesale deposits            $30,250          6.1%      $48,270         13.3%
                                       -------      -------       -------      -------
</TABLE>

    The increase in deposits is largely due to management's growth strategy
emphasizing the Tacoma/Pierce County market area. Following is a summary of
year-end deposits by county:

<TABLE>
<CAPTION>
in thousands                                                Increase
December 31,                  1996          1995        Amount       Percent
                          --------      --------      --------      --------
<S>                       <C>           <C>           <C>             <C>  
Pierce County             $373,380      $264,848      $108,532        41.0%
All other counties         119,842        97,027        22,815        23.5
                          --------      --------      --------        ----
      Total               $493,222      $361,875      $131,347        36.3%
                          ========      ========      ========        ==== 
</TABLE>

Borrowings  The Company relies on FHLB advances to supplement its funding
sources, and the FHLB serves as the Company's primary source of long-term
borrowing. FHLB advances are secured by one- to four-family real estate
mortgages and certain other assets. At December 31, 1996, the Company had total
advances of $32 million at interest rates ranging from 5.20% to 6.14%. The
weighted average interest rate on such advances was 5.63%. At December 31, 1996
the maximum borrowing line from the FHLB was $99.6 million. Management
anticipates that the Company will continue to rely on the same sources of funds
in the future, and will use those funds primarily to make loans and purchase
securities.

Interest Rate Sensitivity

The mismatch between maturities and interest-rate sensitivities of balance sheet
items results in interest rate risk. The Company maintains an asset/liability
management policy that provides guidelines for controlling exposure to that
risk. The guidelines direct management to assess the impact of changes in
interest rates upon both earnings and capital. The guidelines further provide
that in the event of an increase in interest rate risk beyond preestablished
limits, management will consider steps intended to reduce interest rate risk to
acceptable levels.

    Analysis of an institution's interest rate gap (the difference between the
repricing of interest-earning assets and interest-bearing liabilities during a
given period of time) is one standard tool for the measurement of the exposure
to interest rate risk. The Company believes that, because interest rate gap
analysis does not address all factors that can effect earnings performance, it
should be used in conjunction with other methods of evaluating interest rate
risk.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 29.
<PAGE>   32

    The following table sets forth the estimated maturity or repricing, and the
resulting interest rate gap of the Company's interest-earning assets and
interest-bearing liabilities at December 31, 1996. The amounts in the table are
derived from the Company's internal data and are based upon regulatory reporting
formats. Therefore, they may not be consistent with financial information
appearing elsewhere herein that has been prepared in accordance with generally
accepted accounting principles. The amounts could be significantly affected by
external factors such as changes in prepayment assumptions, early withdrawal of
deposits and competition.

<TABLE>
<CAPTION>
                                                             Estimated Maturity or Repricing
     in thousands                      0-3             4-12              1-5             5-10          More than
December 31, 1996                     months          months            years           years          10 years          Total
                                     ---------       ---------        ---------       ---------        ---------       ---------
<S>                                  <C>             <C>              <C>             <C>              <C>             <C>      
Interest-Earning Assets
Interest-earning deposits            $  38,086                                                                         $  38,086
Securities                               1,863       $  15,539        $  22,763       $   1,077        $   4,247          45,489
Loans:
   Business and commercial
      real estate                      188,667           5,201           31,018           1,842            1,822         228,550
   One- to four-family                  73,816          25,074           58,703           2,151           11,012         170,756
   Consumer                              5,079          26,847           21,593           1,859              525          55,903
                                     -------------------------------------------------------------------------------------------
      Total interest-
         earning assets              $ 307,511       $  72,661        $ 134,077       $   6,929        $  17,606       $ 538,784
                                     ===========================================================================================
Noninterest-earning assets                               2,227                                            47,905          50,132
                                     -------------------------------------------------------------------------------------------
      Total assets                   $ 307,511       $  74,888        $ 134,077       $   6,929        $  65,511       $ 588,916
                                     ===========================================================================================
Percent of total interest-
   earning assets                        57.08%          13.48%           24.89%           1.29%            3.26%         100.00%
                                     ===========================================================================================
Interest-Bearing Liabilities
Deposits:
   Money market checking             $ 125,428                                                                         $ 125,428
   NOW accounts                          8,922                        $  35,689                                           44,611
   Savings accounts                      7,456                                        $   7,456        $   7,456          22,368
   Time certificates of deposit         66,470       $ 106,309           44,042              11                          216,832
FHLB advances                           12,000                           20,000                                           32,000
                                     -------------------------------------------------------------------------------------------
      Total interest-
         bearing liabilities         $ 220,276       $ 106,309        $  99,731       $   7,467        $   7,456       $ 441,239
                                     ===========================================================================================
Noninterest-bearing liabilities
   and equity                           67,218                           16,771                           63,688         147,677
                                     -------------------------------------------------------------------------------------------
      Total liabilities
         and equity                  $ 287,494       $ 106,309        $ 116,502       $   7,467        $  71,144       $ 588,916
                                     ===========================================================================================
Percent of total interest-
   earning assets                        40.88%          19.73%           18.52%           1.39%            1.38%          81.90%
                                     ===========================================================================================
Rate sensitivity gap                 $  87,235       $ (33,648)       $  34,346       $    (538)       $  10,150       $  97,545
Cumulative rate sensitivity gap         87,235          53,587           87,933          87,395           97,545
                                     -------------------------------------------------------------------------------------------
Rate sensitivity gap as
   a percentage of
   interest-earning assets               16.20%          (6.25)%           6.37%          (0.10)%           1.88%          18.10%
Cumulative rate sensitivity gap
   as a percentage of interest-
   earning assets                        16.20%           9.95%           16.32%          16.22%           18.10%
                                     ===========================================================================================
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 30
<PAGE>   33

    As stated above, certain shortcomings are inherent in the method of analysis
presented in the foregoing tables. For example, although certain assets and
liabilities may have similar maturities or periods to repricing, they may react
in different degrees to changes in market interest rates. Also, the interest
rates on certain types of assets and liabilities may fluctuate in advance of
changes in market interest rates, while interest rates on other types may lag
behind changes in market interest rates. Additionally, certain assets, such as
adjustable-rate mortgages, have features which restrict changes in the interest
rates of such assets both on a short-term basis and over the lives of such
assets. Further, in the event of a change in market interest rates, prepayment
and early withdrawal levels could deviate significantly from those assumed in
calculating the tables. Finally, the ability of many borrowers to service their
adjustable-rate debt may decrease in the event of a substantial increase in
market interest rates.

Income Tax

Effective January 1, 1993, the Company adopted the FASB's Statement of Financial
Accounting Standards No. 109, "Accounting for Income Taxes" ("SFAS 109"), which
requires the use of the "asset and liability" method of accounting for income
taxes. Deferred income tax represents the net tax effects of temporary
differences between the carrying amounts of assets and liabilities for financial
reporting purposes and the amounts used for income tax purposes. Upon adoption
of SFAS 109, the Company recorded a deferred tax asset with an equal valuation
allowance due to uncertainties regarding the ability to ultimately recognize the
tax benefits from the net operating losses and certain tax credits. The Company
did not record an income tax expense from that date through December 31, 1996
since the expected income tax expense (calculated by applying statutory tax
rates to income before income taxes) was offset by a reduction in the valuation
allowance established when the Company adopted SFAS 109.

    The deferred tax asset is measured by applying tax rates to the difference
between the carrying value and the tax basis of assets and liabilities.
Management anticipates that the Company will record a provision for income taxes
during 1997.

Capital

Shareholders' equity increased to $59.0 million at December 31, 1996 from $32.0
million at December 31, 1995. The increase is due primarily to the issuance of
1.445 million shares of common stock with net proceeds of $20.7 million.
Shareholders' equity was also enhanced by net income for the year of $3.6
million, conversion of convertible subordinated notes of $2.5 million, and a
decrease in the reserve for unrealized gains and losses on securities available
for sale. Shareholders' equity was 10.0% and 7.5% of total assets at December
31, 1996 and December 31, 1995, respectively.

    Banking regulations require bank holding companies to maintain a minimum
"leverage" ratio of core capital to adjusted quarterly average total assets of
at least 3%. At December 31, 1996, the Company's leverage ratio was 10.62%,
compared with 7.72% at December 31, 1995. In addition, banking regulators have
adopted risk-based capital guidelines, under which risk percentages are assigned
to various categories of assets and off-balance sheet items to calculate a
risk-adjusted capital ratio. Tier I capital generally consists of common
shareholders' equity, less goodwill and certain identifiable intangible assets,
while Tier II capital includes the allowance for loan losses and subordinated
debt, both subject to certain limitations. Regulatory minimum risk-based capital
guidelines require Tier I capital of 4% of risk-adjusted assets and total
capital (combined Tier I and Tier II) of 8%. The Company's Tier I and total
capital ratios were 12.81% and 13.79%, respectively, at December 31, 1996,
compared with 9.10% and 10.95%, respectively, at December 31, 1995.

    During 1992, the Federal Deposit Insurance Corporation (the "FDIC")
published the qualifications necessary to be classified as a "well capitalized"
bank, primarily for assignment of FDIC insurance premium rates beginning in
1993. To qualify as "well capitalized," banks must have a Tier I risk-adjusted
capital ratio of at least 6%, a total risk-adjusted capital ratio of at least
10%, and a leverage ratio of at least 5%. Columbia Bank qualified as
"well-capitalized" at December 31, 1996. Failure to qualify as
"well-capitalized" can negatively impact a bank's ability to expand and to
engage in certain activities.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 31
<PAGE>   34

    Applicable federal and Washington state regulations restrict capital
distributions by institutions such as Columbia Bank, including dividends. Such
restrictions are tied to the institution's capital levels after giving effect to
distributions. The Company's ability to pay cash dividends is substantially
dependent upon receipt of dividends from the Bank.

    On April 24, 1996, the Company announced a 5% stock dividend payable on May
22, 1996, to shareholders of record on May 8, 1996. On May 22, 1996, 164,051
common shares were issued to shareholders. Average shares outstanding, net
income per share and book value per share for all periods presented have been
retroactively adjusted to give effect to this transaction.

    On June 3, 1996, the Company gave notice that it would redeem all of its
issued and outstanding 7.85% Convertible Subordinated Notes (the "Notes") on
August 1, 1996. The Notes were convertible in whole or in part, in multiples of
$1,000 principal amount, at 100% of the principal amount of the Note (or portion
thereof), at the conversion price per share of common stock of $10.56. As of
August 1, 1996, all of the Notes were converted into 223,743 shares of common
stock.

    In connection with the public offering of common stock in 1996, the Company
contributed approximately $10 million of the net proceeds to Columbia Bank
primarily to finance additional expansion in Pierce County, and, over the next
several years, into south King and Thurston Counties. The remainder was used to
repay a $3.0 million borrowing and for general corporate purposes.

Impact of Inflation and Changing Prices

The impact of inflation on the Company's operations is increased operating
costs. Unlike most industrial companies, virtually all the assets and
liabilities of a financial institution are monetary in nature. As a result,
interest rates generally have a more significant impact on a financial
institution's performance than the effect of general levels of inflation.
Although interest rates do not necessarily move in the same direction or to the
same extent as the prices of goods and services, increases in inflation
generally have resulted in increased interest rates.

Recent Accounting Pronouncements

In October 1995, the FASB issued Statement of Financial Accounting Standards No.
123, "Accounting for Stock-Based Compensation" ("SFAS 123"). SFAS 123 requires
the Company to elect to account for stock-based compensation on a fair value
basis or an intrinsic value basis. The intrinsic value basis is currently used
by the Company and is the accounting principle prescribed by Accounting
Principles Board No. 25 "Accounting for Stock Issued to Employees" (APB 25).
SFAS 123 requires among other things, disclosure in the footnotes of the pro
forma impact on net income and earnings per share of the difference between
compensation expense using the intrinsic value method and the fair value method
if the fair value method of accounting is not used. The adoption of SFAS 123 is
required for the fiscal year ended December 31, 1996. The Company elected to
continue to apply APB 25 for measurement of stock compensation and has provided
disclosure required by SFAS 123 in footnote No. 10 accompanying the consolidated
financials of the Company.

    In June 1996, the FASB issued Statement of Accounting Standards No. 125,
"Accounting for Transfers and Servicing of Financial Assets and Extinguishments
of Liabilities" ("SFAS 125"). SFAS 125 requires the Company to recognize all
financial assets and servicing that it controls and liabilities that it has
incurred after a transfer of financial assets. The Company must also
"derecognize" financial assets when control has been surrendered and must
derecognize liabilities when extinguished. SFAS 125 is not expected to have a
significant impact on the Company.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 32
<PAGE>   35

Recent Change in Accounting Firms

On February 26, 1997, the Company engaged Deloitte & Touche LLP as the Company's
principal independent accountant. Prior to Deloitte & Touche's engagement, Price
Waterhouse LLP, independent certified public accountants, had served as the
principal independent accountant for the Company and rendered their report with
respect to the Company's financial statements for the year ended December 31,
1996. The recommendation to change accountants was made by management of the
Company and was approved by the Audit Committee and the Board of Directors.

    In the two most recent fiscal years preceding the Board's actions, there
were no disagreements with Price Waterhouse LLP on any matter of accounting
principles or practices, financial statement disclosure, or auditing scope or
procedure, which, if not resolved to Price Waterhouse's satisfaction, would have
caused them to make reference to the subject matter of the disagreement in
connection with their report. Price Waterhouse's reports on the Company's
financial statements for such fiscal years did not contain any adverse opinion
or disclaimer of opinion, nor were such reports qualified in any respect. A
representative of Price Waterhouse is expected to be present at the Annual
Meeting to make a statement, if desired, and to be available to respond to
appropriate questions. The Company does not anticipate that a representative of
Deloitte & Touche will be present at the Meeting.

Quarterly Common Stock Prices and Dividend Payments

The Company's common stock trades on The Nasdaq Stock Market under the symbol
COLB. Price information generally appears daily in the Nasdaq National Market
Issues section of The Wall Street Journal and in most major Pacific Northwest
metropolitan newspapers. On December 31, 1996, the last sale price for the
Company's stock in the over-the-counter market was $16 1/4.

    The Company presently intends to retain earnings to support anticipated
growth. Accordingly, the Company does not intend to pay cash dividends on its
common stock in the foreseeable future. Please refer to the "Capital" section of
the Management Discussion and Analysis of Financial Condition and Results of
Operations, and Note 3 to the consolidated financial statements, contained
elsewhere in this report, for regulatory capital requirements and restrictions
on dividends to shareholders.

    The Company is aware that large blocks of its stock are held in street name
by brokerage firms. At December 31, 1996, the number of shareholders of record
was 872.

    The following are high and low sales prices as reported on the Nasdaq
National Market according to information furnished by the National Association
of Securities Dealers. Prices do not include retail mark-ups, mark-downs or
commissions.

<TABLE>
<CAPTION>
1996                                                 High                  Low
                                                    -------              -------
<S>                                                 <C>                  <C>
First quarter                                       $14 3/4              $11 1/2
Second quarter                                       16 1/2                   13
Third quarter                                        16                   14 1/4
Fourth quarter                                       17 1/4               14 1/2

For the year                                         17 1/4               11 1/2

1995

First quarter                                       $12                  $ 9 1/8
Second quarter                                       12 1/2                9 7/8
Third quarter                                        12 3/8               11 1/8
Fourth quarter                                       12 3/4               11 1/4

For the year                                         12 3/4                9 1/8
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 33.
<PAGE>   36

report of management

The consolidated financial statements have been prepared by management in
accordance with generally accepted accounting principles and include, where
necessary, amounts based on the best estimates and judgments of management. The
primary responsibility for the integrity of data in these financial statements
is that of management. The other financial information in the Annual Report is
consistent with that contained in the consolidated financial statements.

    The consolidated financial statements for 1996 have been audited by Price
Waterhouse LLP, the Company's independent accountants. In planning and
performing their audit, Price Waterhouse LLP considered the Company's internal
control structure in order to determine their auditing procedures for the
purpose of expressing their opinion on the financial statements and not to
provide assurance on the internal control structure. Their consideration of the
internal control structure would not necessarily disclose all matters in the
internal control structure that might be material weaknesses under standards
established by the American Institute of Certified Public Accountants.

    Management maintains an internal control structure which is deemed adequate
to provide reasonable assurance as to the reliability of financial records and
the protection of assets. In establishing the internal control structure,
management weighs the cost of control procedures against the benefits that it
believes can be derived. The Board of Directors monitors the internal control
structure through its Audit Committee. The membership of the Committee is
composed of directors who are not officers or employees of the Company. The
independent and internal auditors have free access to the Audit Committee, and
they meet with the Committee regularly, with and without management present, to
discuss accounting, auditing, internal controls and financial reporting matters.
In the opinion of management, the Company has a capable and aggressive internal
audit department which serves as an integral part of the internal control
structure.

/s/ A. G. Espe              /s/ W. W. Philip           /s/ Gary R. Schminkey

A. G. Espe                  W. W. Philip               Gary R. Schminkey
Chairman and                President and              Senior Vice President and
Chief Executive Officer     Chief Operating Officer    Chief Financial Officer


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 34.
<PAGE>   37

report of independent accountants

To the Board of Directors and Shareholders of Columbia Banking System, Inc.

In our opinion, the accompanying consolidated balance sheets as of December 31,
1996 and 1995, and the related consolidated statements of operations, of
shareholders' equity and of cash flows for each of the three years in the period
ended December 31, 1996, present fairly, in all material respects, the financial
position of Columbia Banking System, Inc. and its subsidiaries, and the results
of their operations and their cash flows for each of the three years in the
period ended December 31, 1996, in conformity with generally accepted accounting
principles. These financial statements are the responsibility of the Company's
management; our responsibility is to express an opinion on these financial
statements based on our audits. We conducted our audits of these statements in
accordance with generally accepted auditing standards which require that we plan
and perform the audits to obtain reasonable assurance about whether the
financial statements are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements, assessing the accounting principles used and
significant estimates made by management, and evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for the opinion expressed above.

/s/ Price Waterhouse LLP

Seattle, Washington
January 22, 1997


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 35.
<PAGE>   38
consolidated statements of operations


<TABLE>
<CAPTION>
in thousands except per share
     years ended December 31,                  1996           1995          1994
                                             --------       --------      --------
<S>                                          <C>            <C>           <C>     
Interest Income
Loans                                        $ 36,048       $ 30,038      $ 18,990
Investment securities                                          1,078         1,127
Securities available for sale                   1,878            290           205
Deposits with banks                             1,136            314           334
                                             --------       --------      --------
   Total interest income                       39,062         31,720        20,656

Interest Expense
Deposits                                       16,469         13,385         7,304
Federal Home Loan Bank advances                 1,865          1,503         1,160
Other borrowings                                  184            271           612
                                             --------       --------      --------
   Total interest expense                      18,518         15,159         9,076
                                             --------       --------      --------
Net Interest Income                            20,544         16,561        11,580
Provision for loan losses                       1,420          1,250         1,000
   Net interest income after
      provision for loan losses                19,124         15,311        10,580

Noninterest Income
Service charges and other fees                  2,381          1,895         1,242
Mortgage banking                                  636            394           782
Gains (losses) on sales of
   securities available for sale                                  (8)
Gains on sales of loans, net                                      39
Credit card fees and other fees                 2,291          1,671           972
                                             --------       --------      --------
   Total noninterest income                     5,308          3,991         2,996
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 36.
<PAGE>   39

<TABLE>
<CAPTION>
in thousands except per share
     years ended December 31,                       1996           1995           1994
                                                  --------       --------       --------
<S>                                               <C>            <C>            <C>     
Noninterest Expense
Compensation and employee benefits                $  8,437       $  7,339       $  6,219
Occupancy                                            3,388          2,845          2,802
Professional services                                  574            436            427
Advertising and promotion                              772            634            508
Printing and supplies                                  414            375            397
Regulatory assessments                                 323            482            475
Data processing                                        807            615            463
Gains on, and net cost of, real estate owned                         (400)          (314)
Other                                                5,528          4,221          3,059
SAIF special assessment                                612
                                                  --------       --------       --------
   Total noninterest expense                        20,855         16,547         14,036
     Income (loss) from
        continuing operations 
        before income tax                            3,577          2,755           (460)
                                                  --------       --------       --------
Provision for income tax
     Income (loss) from continuing
        operations before
        extraordinary item                           3,577          2,755           (460)
Extraordinary loss on
   extinguishment of debt, net                                                      (154)
                                                  --------       --------       --------
Net Income (Loss)                                 $  3,577       $  2,755       $   (614)
                                                  ========       ========       ========
Per Share (On Average Shares Outstanding)
Income (loss) from continuing operations          $   0.93       $   0.79       $  (0.13)
Extraordinary loss on
   extinguishment of debt, net                                                     (0.05)
Net income (loss)                                     0.93           0.79          (0.18)
Fully diluted net income (loss)                       0.92           0.79          (0.18)
Average number of common and common
   equivalent shares outstanding                     3,866          3,496          3,481
Fully diluted average common and common
   equivalent shares outstanding                     4,047          3,752          3,740
</TABLE>

see accompanying notes to consolidated financial statements


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 37
<PAGE>   40

consolidated balance sheets

<TABLE>
<CAPTION>
in thousands
December 31,                                              1996            1995
                                                        --------        --------
<S>                                                     <C>             <C>     
Assets
Cash and due from banks                                 $ 32,092        $ 18,244
Interest-earning deposits with banks                      38,086          12,635
Securities available for sale:
   U.S. Treasury & government agencies                    30,481           6,948
   Mortgage-backed                                        10,760          12,446
   FHLB stock                                              4,248           3,281
                                                        --------        --------
      Total securities available for sale                 45,489          22,675
Loans held for sale                                       11,341           1,367
Loans                                                    446,095         353,093
   Less: allowance for loan losses                         4,504           3,748
                                                        --------        --------
      Loans, net                                         441,591         349,345
Interest receivable                                        3,347           2,469
Premises and equipment, net                               15,250          13,736
Real estate owned                                             40           3,304
Other                                                      1,680           1,431
                                                        --------        --------
Total Assets                                            $588,916        $425,206
                                                        ========        ========
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 38
<PAGE>   41
<TABLE>
<CAPTION>

December 31,
in thousands                                                                                  1996           1995
                                                                                            --------       --------
<S>                                                                                         <C>            <C>
Liabilities and Shareholders' Equity                         
Deposits:
   Noninterest-bearing                                                                      $ 83,983       $ 52,991
   Interest-bearing                                                                          409,239        308,884
                                                                                            --------       --------
      Total deposits                                                                         493,222        361,875
Federal Home Loan Bank advances                                                               32,000         25,000
Other liabilities                                                                              4,734          3,669
Convertible subordinated notes                                                                                2,695
                                                                                            --------       --------
   Total liabilities                                                                         529,956        393,239

Commitments and contingent liabilities (Note 12)

Shareholders' equity:
   Preferred stock (no par value)
      Authorized, 2,000,000 shares; none outstanding
</TABLE>


<TABLE>
<CAPTION>
                                                                   December 31,
                                                              1996            1995
                                                           ---------       ---------
<S>                                                         <C>              <C>           <C>            <C>
   Common stock (no par value)    
      Authorized shares                                      10,000          10,000
      Issued and outstanding                                  5,185           3,274           56,340         30,806
   Retained earnings                                                                           2,694          1,274
   Unrealized losses on securities available for sale                                            (74)          (113)
      Total shareholders' equity                                                              58,960         31,967
                                                                                           ---------      ---------
Total Liabilities and Shareholders' Equity                                                 $ 588,916      $ 425,206
                                                                                           =========      =========
</TABLE>

see accompanying notes to consolidated financial statements


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 39
<PAGE>   42

consolidated statements of shareholders' equity

<TABLE>
<CAPTION>
                                                     Common Stock           
                                                   Number                   
in thousands                                    of Shares       Amount      
                                                ---------      --------     
<S>                                             <C>            <C>          
Balance at December 31, 1993                       3,250       $ 30,668     
   Adjustment to beginning balance
      for change in accounting method, net                                  
   Net loss                                                                 
   Issuance of shares of common stock, net             8             35     
                                                   -----        -------
   Change in unrealized losses                                              
Balance at December 31, 1994                       3,258         30,703     
   Net income                                                               
   Issuance of shares of common stock, net            16            103
                                                   -----        -------     
   Change in unrealized gains and (losses)                                  
Balance at December 31, 1995                       3,274         30,806     
   Net income                                                               
   Issuance of shares of common stock, net         1,492         20,868     
   Issuance of shares of common stock
      5% stock dividend                              164          2,157     
   Conversion of Convertible
      Subordinated Notes                             255          2,509
                                                   -----       --------     
   Change in unrealized gains and (losses)                                  
Balance at December 31, 1996                       5,185       $ 56,340     
                                                   =====       ========
</TABLE>

see accompanying notes to consolidated financial statements


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 40
<PAGE>   43

<TABLE>
<CAPTION>
                                                               Unrealized             Total
                                                Retained        Gains and     Shareholders'
in thousands                                    Earnings         (Losses)            Equity
                                                --------       ----------     -------------
<S>                                             <C>            <C>            <C>
Balance at December 31, 1993                    $   (867)                     $ 29,801
   Adjustment to beginning balance
      for change in accounting method, net                     $    (32)           (32)
   Net loss                                         (614)                         (614)
   Issuance of shares of common stock, net                                          35
   Change in unrealized losses                                     (329)          (329)
                                                --------       --------       --------
Balance at December 31, 1994                      (1,481)          (361)        28,861
   Net income                                      2,755                         2,755
   Issuance of shares of common stock, net                                         103
   Change in unrealized gains and (losses)                          248            248
                                                --------       --------       --------
Balance at December 31, 1995                       1,274           (113)        31,967
   Net income                                      3,577                         3,577
   Issuance of shares of common stock, net                                      20,868
   Issuance of shares of common stock
      5% stock dividend                           (2,157)
   Conversion of Convertible
      Subordinated Notes                                                         2,509
   Change in unrealized gains and (losses)                           39             39
                                                --------       --------       --------
Balance at December 31, 1996                    $  2,694       $    (74)      $ 58,960
                                                ========       ========       ========
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 41
<PAGE>   44

consolidated statements of cash flows


<TABLE>
<CAPTION>
in thousands                                                     1996            1995            1994
                                                               ---------       ---------       --------- 
<S>                                                            <C>             <C>             <C>       
Operating Activities
Net income (loss)                                              $   3,577       $   2,755       $    (614)
Adjustments to reconcile net income (loss) to net cash
   provided (used) by operating activities:
   Provision for loan losses                                       1,420           1,250           1,000
   Losses (gains) on real estate owned                                41              29             (30)
   Depreciation and amortization                                   2,327           1,365           1,610
   Net realized losses (gains) on sale of investments                185             (53)            (12)
   (Increase) decrease in loans held for sale                     (9,974)            245             165
   Increase in interest receivable                                  (878)           (735)           (635)
   Increase in interest payable                                      368             388             538
   Net changes in other assets and liabilities                       184           1,317            (352)
                                                               ---------        --------        --------
      Net cash provided (used) by operating activities            (2,750)          6,561           1,670

Investing Activities
Proceeds from maturities of securities available for sale         11,347             215             537
Proceeds from sales of securities available for sale                               5,980
Purchase of securities available for sale                        (35,686)         (6,000)
Proceeds from maturities of mortgage-backed
   securities available for sale                                   1,682
Proceeds from maturities of investment securities                                  4,243           2,557
Purchases of investment securities                                                (4,675)           (266)
Loans originated and acquired, net of principal collected        (94,294)        (88,579)        (88,286)
Proceeds from sales of loans                                                       4,756
Purchases of premises and equipment                               (4,751)         (6,660)         (3,544)
Proceeds from disposal of premises and equipment                   1,273             240             412
Proceeds from sale of real estate owned                            3,263              13             536
Other, net                                                                          (119)
                                                               ---------        --------        --------
      Net cash used by investing activities                     (117,166)        (90,586)        (88,054)
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 42
<PAGE>   45

<TABLE>
<CAPTION>
in thousands                                                  1996           1995             1994
                                                           ---------       ---------       ---------
<S>                                                        <C>             <C>             <C>      
Financing Activities
Net increase in deposits                                     131,347          93,183         103,353
Proceeds from FHLB advances
   and other long-term debt                                   30,800          17,000          17,000
Repayment of FHLB advances
   and other long-term debt                                  (23,800)         (9,000)        (32,000)
Repayment of other borrowings                                                                 (4,600)
Proceeds from issuance of common stock, net                   20,868              63              35
                                                           ---------       ---------       ---------
      Net cash provided by financing activities              159,215         101,246          83,788
                                                           ---------       ---------       ---------
         Increase (decrease) in cash
            and cash equivalents                              39,299          17,221          (2,596)
         Cash and cash equivalents at
            beginning of period                               30,879          13,658          16,254
                                                           ---------       ---------       ---------
      Cash and cash equivalents at end of period           $  70,178       $  30,879       $  13,658
                                                           =========       =========       =========
Supplemental Information
Cash paid for interest                                     $  18,149       $  14,771       $   8,538
Transfer from investment securities
   to securities available for sale                                           19,912
Loans foreclosed and transferred to real estate owned             40                             428
Issuance of common stock from conversion
   of convertible subordinated notes                           2,509              40
</TABLE>

see accompanying notes to consolidated financial statements


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 43
<PAGE>   46
         notes to consolidated financial statements

         Columbia Banking System, Inc. (the "Company") is a registered bank
         holding company whose wholly owned subsidiary, Columbia State Bank
         ("Columbia Bank"), conducts a full-service commercial banking business.
         Headquartered in Tacoma, Washington, the Company provides a full range
         of commercial banking services to small and medium-sized businesses,
         professionals and other individuals through 16 banking offices located
         in the Tacoma metropolitan area and contiguous parts of the Puget Sound
         region of Washington, as well as the Longview and Woodland communities
         in southwestern Washington. Substantially all of the Company's loans,
         loan commitments and core deposits are geographically concentrated in
         its service areas.

1.       summary of significant accounting policies

         The financial statements have been prepared in accordance with
         generally accepted accounting principles. Accordingly, they include all
         of the information and footnotes required by generally accepted
         accounting principles for complete financial statements. In the opinion
         of management, all adjustments including normal recurring accruals
         necessary for a fair presentation of results of operations for all
         periods included herein have been made. The results of operations for
         the year ending December 31, 1996 are not necessarily indicative of
         results to be anticipated for future periods.

         Consolidation

         The consolidated financial statements of the Company include the
         accounts of the corporation and its wholly-owned subsidiaries after the
         elimination of all material intercompany transactions and accounts.

         Securities

         Securities to be held for indefinite periods of time and not intended
         to be held to maturity or on a long-term basis are classified as
         available for sale and carried at market value. Unrealized gains and
         losses are recorded directly to a component of shareholders' equity.
         Securities held for indefinite periods of time include securities that
         management intends to use as part of its asset/liability management
         strategy and that may be sold in response to changes in interest rates
         and/or significant prepayment risk.

                  Investment securities are those securities which the Company
         has the ability and intent to hold to maturity. Events which may be
         reasonably anticipated are considered when determining the Company's
         intent to hold investment securities until maturity. Investment
         securities are carried at cost, adjusted for amortization of premiums
         and accretion of discounts using a method that approximates the
         interest method. Gains and losses on the sale of all securities are
         determined using the specific identification method.

         Loans

         Loans are stated at their principal amount outstanding, less any
         unamortized discounts and deferred net loan fees. Loans held for sale
         are carried at the lower of cost or market value. The amount by which
         cost exceeds market for loans held for sale is accounted for as a
         valuation allowance, and changes in the allowance are included in the
         determination of net income in the period in which the change occurs.

                  The current policy of the Company generally is to discontinue
         the accrual of interest on all loans past due 90 days or more and place
         them on nonaccrual status.

                  Premiums or discounts purchased and sold are amortized, using
         the interest method, over periods which approximate the average life of
         the loans.

         Loan Fee Income

         Loan origination fees and certain direct loan origination costs are
         deferred and the net amount recognized as an adjustment to yield over
         the contractual life of the related loans. Costs related to origination
         of credit cards are expensed as incurred. Fees related to lending
         activity other than the origination or purchase of loans are recognized
         as noninterest income during the period the related services are
         performed.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 44
<PAGE>   47

Allowance for Loan Losses

The allowance for loan losses is maintained at a level believed to be sufficient
to absorb potential losses in the portfolio. Management's determination of the
adequacy of the allowance is based on a number of factors, including the level
of nonperforming loans, loan loss experience, credit concentrations, a review of
the quality of the loan portfolio, collateral values and uncertainties in
economic conditions.

Premises and Equipment

Premises and equipment are recorded at cost and depreciated over the estimated
useful lives of the assets. Depreciation and amortization are computed using the
straight-line method. Gains or losses on dispositions are reflected in
operations. Expenditures for improvements and major renewals are capitalized,
and ordinary maintenance, repairs and small purchases are charged to operations
as incurred.

Real Estate Owned

All real estate acquired in satisfaction of a loan is considered held for sale
and reported as "real estate owned." Real estate owned is carried at the lower
of cost or fair value less estimated cost of disposal. Cost at the time of
foreclosure is defined as the fair value of the asset less estimated disposal
costs.

Intangible Assets

Intangible assets represent assets purchased by the Company in mergers and
acquisitions. The recorded cost of each asset is amortized using the
straight-line method over its estimated useful life (up to 15 years for core
deposit intangible assets and 25 years for goodwill).

         At December 31, 1996 and 1995, intangible assets amounted to $188,000
and $266,000, respectively, net of accumulated amortizations.

Income Tax

The provision for income tax, generally, is based on income and expense reported
for financial statement purposes, using the "asset and liability method" for
accounting for deferred income tax. Deferred tax assets and liabilities are
recognized for the future tax consequences attributable to differences between
the financial statement carrying amounts of existing assets and liabilities and
their respective tax bases. Deferred tax assets and liabilities are measured
using enacted tax rates expected to apply to taxable income in the years in
which those temporary differences are expected to be recovered or settled. The
effect on deferred tax assets and liabilities of a change in tax rates is
recognized in income in the period that includes the enactment date. A valuation
allowance is recorded against any deferred tax assets for which it is more
likely than not that the deferred tax asset will not be realized.

Earnings Per Share

Earnings per share is computed using the weighted average number of shares of
common and common equivalent shares outstanding during the period. Common
equivalent shares result from the assumed exercise of outstanding stock options,
if dilutive. Fully diluted earnings per share assumes conversion of convertible
subordinated notes, if dilutive.

Use of Estimates

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts of assets and liabilities and the disclosure of
contingent assets and liabilities at the date of the financial statements, and
the reported amounts of revenues and expenses during the reporting period.
Actual results could differ from those estimates. Significant estimates are used
in determining the level of the allowance for loan losses, valuation allowance
on deferred tax assets, depreciation of premises and equipment and others.

Statement of Cash Flows

The accompanying consolidated statements of cash flows have been prepared using
the "indirect" method for presenting cash flows from operating activities. For
purposes of this statement, cash and cash equivalents include cash and due from
banks, interest-earning deposits with banks and federal funds sold.

Reclassification

Certain amounts in the 1995 and 1994 consolidated financial statements have been
reclassified to conform with the 1996 presentation. These reclassifications had
no effect on net income (loss).


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 45
<PAGE>   48

2.       termination of assistance agreement and extinguishment of debt

         In connection with the acquisition of the Savings Bank in 1988, the
         Savings Bank and the Company entered into an agreement (the "Assistance
         Agreement"), pursuant to which the Federal Savings and Loan Insurance
         Corporation (the "FSLIC") provided various forms of financial and other
         assistance to the Savings Bank, including the purchase of a $5 million
         subordinated debenture due August 2, 1998. On September 30, 1994,
         Columbia Bank entered into an agreement with the FDIC, as successor to
         the FSLIC, to terminate the Assistance Agreement and to settle the
         obligations under the subordinated debenture for $4.6 million,
         resulting in an extraordinary nonrecurring loss of approximately
         $154,000.

3.       restrictions on subsidiary cash, loans and dividends

         Columbia Bank is required to maintain reserve balances with the Federal
         Reserve Bank. The average required reserves for the year ended December
         31, 1996 were approximately $1.1 million. The required reserves are
         based on specified percentages of the Bank's total average deposits
         which are established by the Federal Reserve Board.

                  Under Federal Reserve regulations, Columbia Bank, generally,
         is limited as to the amount it may loan to the Company to 10% of its
         capital stock and additional paid-in capital. Such loans must be
         collateralized by specified obligations.

                  Under Washington state banking regulations, Columbia Bank is
         limited as to the ability to declare or pay dividends to the Company up
         to the amount of the Columbia Bank's net profits then on hand, less any
         required transfers to additional paid-in capital.

4.       securities

         The following table summarizes the amortized cost, gross unrealized
         gains and losses and the resulting market value of securities available
         for sale.

<TABLE>
<CAPTION>
                                                                      Gross          Gross
                                                    Amortized    Unrealized     Unrealized         Market
             in thousands                                Cost         Gains         Losses          Value
                                                    ---------    ----------     ----------       --------
<S>                                                 <C>          <C>            <C>              <C>     
December 31, 1996
            U.S. Treasury and government agency      $ 30,441      $     40                      $ 30,481
            Mortgage-backed                            10,874                     $   (114)        10,760
            FHLB stock                                  4,248                                       4,248
                                                     --------      --------       --------       --------
               Total                                 $ 45,563      $     40       $   (114)      $ 45,489
                                                     ========      ========       ========       ========
December 31, 1995
            U.S. Treasury and government agency      $  6,935      $     13                      $  6,948
            Mortgage-backed                            12,572                     $   (126)        12,446
            FHLB stock                                  3,281                                       3,281
                                                     --------      --------       --------       --------
               Total                                 $ 22,788      $     13       $   (126)      $ 22,675
                                                     ========      ========       ========       ========
</TABLE>

                  In November 1995, the FASB issued a Special Report, "A Guide
         to Implementation of Statement 115 on Accounting for Certain
         Investments in Debt and Equity Securities." In addition to the report,
         the FASB permitted a one-time opportunity for institutions to reassess
         the appropriateness of the designations of all securities. Accordingly,
         in December 1995, the Company reclassified all "investment securities"
         to "securities available for sale" resulting in additional net
         unrealized losses of $113,000.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 46
<PAGE>   49

                  At December 31, 1996 and 1995, securities available for sale
         with a fair value of $3.7 million and $3.0 million, respectively, were
         pledged to secure public deposits and for other purposes as required or
         permitted by law.

                  The following table summarizes the amortized cost and market
         values of securities available for sale by contractual maturity groups:

<TABLE>
<CAPTION>
     in thousands                                                          Amortized          Market
December 31, 1996                                                               Cost           Value
                                                                           ---------       ---------
<S>                                                                        <C>             <C>    
Amount maturing:
            Within one year                                                  $15,015         $15,040
            Greater than one year and less than five years                    22,613          22,529
            Greater than five years and less than ten years                    2,011           1,959
            After ten years                                                    5,924           5,961
                                                                             -----------------------
               Total                                                         $45,563         $45,489
                                                                             =======================
</TABLE>

5.       loans

         The following is an analysis of the loan portfolio by major types of
         loans:

<TABLE>
<CAPTION>
in thousands
December 31,                                                                 1996            1995
                                                                           ---------       ---------
<S>                                                                        <C>             <C>      
Commercial business                                                        $ 169,318       $ 113,775
Real estate:
            One- to four-family residential                                   67,709          67,991
            Five or more family residential and commercial properties        128,803          97,103
                                                                           ---------       ---------
               Total real estate                                             196,512         165,094
Real estate construction:
            One- to four-family residential                                   21,380          22,741
            Five or more family residential and commercial properties         10,680           8,884
                                                                           ---------       ---------
               Total real estate construction                                 32,060          31,625
Consumer                                                                      48,807          43,343
                                                                           ---------       ---------
            Subtotal                                                         446,697         353,837
Less deferred loan fees, net and other                                          (602)           (744)
                                                                           ---------       ---------
            Total loans                                                    $ 446,095       $ 353,093
                                                                           =========       =========
Loans held for sale                                                        $  11,341       $   1,367
                                                                           =========       =========
</TABLE>

                  At December 31, 1996 and 1995, residential real estate loans
         with recorded values of $38.4 million and $30.0 million, respectively,
         were pledged to secure Federal Home Loan Bank advances and for other
         purposes.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 47
<PAGE>   50

         The following table summarizes certain information related to
         nonperforming loans:

<TABLE>
<CAPTION>
in thousands
December 31,                                           1996        1995        1994
                                                      ------      ------      ------
<S>                                                   <C>         <C>         <C>   
Loans accounted for on a nonaccrual basis             $2,227      $  435      $  452
Restructured loans                                        25          29          44
                                                      ------------------------------
            Total nonperforming loans                 $2,252      $  464      $  496
                                                      ==============================
Originally contracted interest                        $  219      $   49      $   50
Recorded interest                                        102          38          27
                                                      ------------------------------
            Reduction in interest income              $  117      $   11      $   23
                                                      ==============================
</TABLE>

                  In May 1993, the FASB issued Statement of Financial Accounting
         Standards No. 114, "Accounting by Creditors for Impairment of a Loan"
         ("SFAS 114"), which requires that impaired loans (as defined) be
         measured based on the present value of expected future cash flows
         discounted at the loan's effective interest rate or the fair value of
         the collateral. In October 1994, the Board issued Statement No. 118
         ("SFAS 118"), amending SFAS 114 with regard to income recognition and
         disclosure related to impaired loans. Impaired loans generally refer to
         all loans that are restructured in a troubled debt restructuring
         involving a modification of terms, nonaccrual loans and loans past due
         90 days and still accruing. The Company adopted the new standard in
         1995.

                  At December 31, 1996 and 1995, the recorded investment in
         impaired loans was $2.3 million and $616,000, respectively. No specific
         allocated allowance for loan losses has been made for impaired loans.
         The average recorded investment in impaired loans for the periods ended
         December 31, 1996 and 1995 was $1.4 million and $513,000 respectively.

                  At December 31, 1996 and 1995, there were no commitments for
         additional funds for loans accounted for on a nonaccrual basis.

                  At December 31, 1996 and 1995, the Company had no foreign
         loans or loans related to highly leveraged transactions.

                  The Company's banking subsidiaries have granted loans to
         officers and directors of the Company and their associates. These loans
         are made on substantially the same terms, including interest rates and
         collateral, as those prevailing at the time for comparable transactions
         with unrelated persons and do not involve more than the normal risk of
         collectibility. The aggregate dollar amount of these loans were $4.4
         million and $4.6 million at December 31, 1996 and 1995, respectively.
         During 1996, $2.9 million of new related party loans were made and
         repayments and transfers totaled $3.1 million.

6.       allowance for loan losses

         Transactions in the allowance for loan losses are summarized as
         follows:

<TABLE>
<CAPTION>
            in thousands
years ended December 31,                     1996          1995           1994
                                            -------       -------       -------
<S>                                         <C>           <C>           <C>    
Balance at beginning of period              $ 3,748       $ 2,711       $ 1,992
Loans charged off                              (684)         (263)         (364)
Recoveries                                       20            50            83
                                            -------       -------       -------
            Net charge-offs                    (664)         (213)         (281)
Provision charged to operating expense        1,420         1,250         1,000
                                            -----------------------------------
            Balance at end of period        $ 4,504       $ 3,748       $ 2,711
                                            ===================================
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 48
<PAGE>   51

7.       premises and equipment

         Land, buildings, and furniture and equipment, less accumulated
         depreciation and amortization, were as follows:

<TABLE>
<CAPTION>
in thousands
December 31,                                              1996           1995
                                                        --------       --------
<S>                                                     <C>            <C>     
Land                                                    $  2,914       $  1,748
Buildings                                                  9,419          8,589
Leasehold improvements                                     1,434          1,509
Furniture and equipment                                    6,339          5,533
Automobiles                                                  102            101
Computer software                                            583            691
                                                        -----------------------
            Total cost                                    20,791         18,171
Less accumulated depreciation and amortization            (5,541)        (4,435)
                                                        -----------------------
            Total                                       $ 15,250       $ 13,736
                                                        =======================
</TABLE>

                  Total depreciation and amortization expense on buildings and
         furniture and equipment was $1.8 million, $1.7 million and $1.6 million
         for the years ended December 31, 1996, 1995 and 1994, respectively.

                  The Company is obligated under various noncancellable lease
         agreements for property and equipment (primarily for land and
         buildings) which require future minimum rental payments, exclusive of
         taxes and other charges, as follows:

<TABLE>
<CAPTION>
             in thousands
years ending December 31,
<S>                                                                       <C>   
1997                                                                      $1,151
1998                                                                       1,055
1999                                                                         888
2000                                                                         634
2001                                                                         394
2002 and thereafter                                                        2,757
                                                                          ------
     Total minimum payments                                               $6,879
                                                                          ======
</TABLE>

                  Total rental expense on buildings and equipment was $983,000,
         $946,000 and $909,000 for the years ended December 31, 1996, 1995 and
         1994, respectively.

8.       federal home loan bank advances and long-term debt

         Federal Home Loan Bank ("FHLB") advances and long-term debt consisted
         of the following:

<TABLE>
<CAPTION>
in thousands
December 31,                                                    1996         1995
                                                              -------      -------
<S>                                                           <C>          <C>    
Federal Home Loan Bank advances                               $32,000      $25,000
7.85% Convertible Subordinated Notes due June 30, 2002                       2,695
                                                              --------------------
            Total FHLB advances and other long-term debt      $32,000      $27,695
                                                              ====================
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 49
<PAGE>   52

                  On June 3, 1996, the Company gave notice that it would redeem
         all of its issued and outstanding 7.85% Convertible Subordinated Notes
         (the "Notes") on August 1, 1996. The Notes were convertible in whole or
         in part, in multiples of $1,000 principal amount, at 100% of the
         principal amount of the Note (or portion thereof), at the conversion
         price per share of common stock of $10.56. As of August 1, 1996 all of
         the Notes were converted into 223,743 shares of common stock.

                  FHLB advances are at the following interest rates:

<TABLE>
<CAPTION>
in thousands
December 31,                                             1996             1995
                                                        -------          -------
<S>                                                     <C>              <C>    
6.90%                                                                    $ 5,000
6.20                                                                       2,000
6.14                                                    $10,000
6.09                                                                       8,000
5.79                                                      2,000
5.45                                                     10,000
5.32                                                      5,000            5,000
5.20                                                      5,000            5,000
                                                        ------------------------
            Total                                       $32,000          $25,000
                                                        ========================
</TABLE>

         Aggregate maturities of FHLB advances due in years ending after
         December 31, 1996, are as follows:

<TABLE>
<CAPTION>
in thousands                                                              Amount
                                                                         -------
<S>                                                                      <C>    
1997                                                                     $10,000
1998                                                                      20,000
2000                                                                       2,000
                                                                         -------
            Total                                                        $32,000
                                                                         =======
</TABLE>

                  FHLB advances are collateralized by residential real estate
         loans with a recorded value of approximately $38.4 million at December
         31, 1996, and $30.0 million at December 31, 1995 (see Note 5).
         Penalties are generally required for prepayments of certain long-term
         FHLB advances.

9.       income tax

         The components of income tax expense are as follows:

<TABLE>
<CAPTION>
            in thousands
years ended December 31,                1996           1995           1994
                                        ----           ----           ----
<S>                                     <C>            <C>            <C> 
Current
Deferred
                                        ----           ----           ----
            Total                       None           None           None
                                        ====           ====           ====
</TABLE>

                  Effective January 1, 1993, the Company adopted the FASB's
         Statement of Financial Accounting Standards No. 109, "Accounting for
         Income Taxes" ("SFAS 109"). This Statement requires the use of the
         "asset and liability" method of accounting for income taxes. Deferred
         income tax represents the net tax effects of temporary differences
         between the carrying amounts of assets and liabilities for financial
         reporting purposes and the amounts used for income tax purposes.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 50
<PAGE>   53

                  Significant components of the Company's deferred tax assets
         and liabilities at December 31, 1996 and 1995 are as follows:

<TABLE>
<CAPTION>
in thousands
December 31,                                                                           1996       1995
                                                                                      -------    -------
<S>                                                                                   <C>        <C>
Deferred tax assets:
            Net operating loss carryforward                                                      $ 1,478
            Allowance for loan losses                                                 $ 1,531      1,274
            Contributions                                                                 164         97
                                                                                      -------    -------
               Total deferred tax assets                                                1,695      2,849
            Less: valuation allowance                                                    (768)    (2,011)
                                                                                      -------    -------
               Subtotal                                                                   927        838
Deferred tax liabilities:
            FHLB stock dividends                                                         (657)      (551)
            Depreciation                                                                  (18)       (35)
                                                                                      -------    -------
               Total deferred tax liabilities                                            (675)      (586)
                                                                                      -------    -------
                  Net deferred tax assets                                             $   252    $   252
                                                                                      =======    =======
</TABLE>

         A reconciliation of the Company's effective income tax rate with the
         federal statutory tax rate is as follows:

<TABLE>
<CAPTION>
    dollars in thousands                        1996                  1995                  1994
                                        ------------------     ------------------     ------------------
years ended December 31,                Amount     Percent     Amount     Percent     Amount     Percent
                                        -------    -------     -------    -------     -------    -------
<S>                                     <C>        <C>         <C>        <C>         <C>        <C>
Income tax based
            on statutory rate           $(1,216)       (34)%   $  (937)       (34)%   $   209         34%
Increase (reduction)
            resulting from:
               Other nondeductible
                  items                     (27)        (1)        (37)        (1)        (27)        (4)
               Valuation allowance        1,243         35         974         35        (182)       (30)
                                        -------    -------     -------    -------     -------    -------
Income tax                              $     0          0%    $     0          0%    $     0          0%
                                        =======    =======     =======    =======     =======    =======
</TABLE>

10.      stock options and warrants

         At December 31, 1996 and 1995, the Company had stock options
         outstanding of 275,168 shares and 247,433 shares, respectively, for the
         purchase of common stock at option prices ranging from $2.38 to $21.25
         per share. The Company's policy is to recognize compensation expense at
         the date the options were granted due to the difference, if any,
         between the then market value of the Company's common stock and the
         stated option price.

                  At December 31, 1996 and 1995, the Company had options
         outstanding granted to a company controlled by a director for the
         purchase of 36,317 and 13,858 shares of common stock at exercise prices
         of approximately $6.45 and $8.81 per share, respectively. These options
         are generally exercisable in whole or in part at any time before
         September 26, 2000.

                  At December 31, 1996 and 1995, the Company had stock warrants
         outstanding to purchase 18,716 shares of common stock at $10.14 per
         share, which expires in 1997.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 51
<PAGE>   54

         The following table outlines the stock option activity for 1996 and
         1995:

<TABLE>
<CAPTION>
in thousands                                   Balance          Price Range
                                               -------        -------------
<S>                                            <C>            <C>         
Balance at December 31, 1994                   316,061        $ 2.38-$11.19
            Issued                              15,225          9.29- 10.71
            Exercised                           (8,400)         2.38
            Terminated                          (6,562)         9.29- 11.19
                                               -------        -------------
Balance at December 31, 1995                   316,324          2.38- 11.19
            Issued                              53,525         12.56- 21.25
            Exercised                          (18,970)         2.38- 11.19
            Terminated                          (6,820)         9.29- 11.19
                                               -------        -------------  
Balance at December 31, 1996                   344,059        $ 3.81-$21.25
                                               =======        =============  
Total Vested at December 31, 1996              194,716        $ 3.81-$11.19
                                               =======        =============  
</TABLE>

                  In August 1996, the Personnel and Compensation Committee of
         the Board of Directors of the Company approved the grant to Mr. A. G.
         Espe (Chairman of the Board and Chief Executive Officer) of an option
         to purchase 40,000 shares of Common Stock at prices ranging from $15.25
         to $21.25. The Board also approved the grant to Mr. W. W. Philip
         (Director, President and Senior Operating Officer) of a restricted
         stock award for 20,000 shares of Common Stock. The market value of the
         Common Stock at the date of grants to both Messrs. Espe and Philip was
         $15.25 per share.

                  The option to Mr. Espe, which is subject to approval by the
         shareholders of additional shares to be available pursuant to the Plan
         and certain other amendments to the Plan, provides for 10,000 shares to
         vest (become exercisable) in August 1997 at an option price of $15.25,
         and 10,000 additional shares to vest each year beginning in August 1998
         and continuing through August 2000 at option prices of $17.25, $19.25
         and $21.25, respectively. Earlier vesting of the options may be
         approved at the sole discretion of the Board or the Compensation
         Committee of the Board and will occur in the event of termination of
         employment without cause (as defined) following a change in control (as
         defined) of the Company. Vested options will remain exercisable for ten
         years from the date of vesting in the event of Mr. Espe's retirement
         (as approved by the Board), death or disability, or a change in control
         of the Company or Columbia Bank (as the term is defined in Mr. Espe's
         Employment Agreement).

                  The restricted stock award to Mr. Philip provides for the
         immediate issuance of 20,000 shares of the Company's Common Stock to
         Mr. Philip in escrow. The shares are to remain in escrow until Mr.
         Philip has served as an active officer or Board member of the Company
         and/or Columbia Bank for a period of five years from the date of the
         grant, unless that term is reduced (i) by action of the Board or the
         Personnel and Compensation Committee, (ii) by reason of a change of
         control of the Company or Columbia Bank (as defined in Mr. Philip's
         Employment Agreement), or (iii) by Mr. Philip's death or disability.
         Mr. Philip will have the right to vote shares and to receive any
         dividends or other distributions on the shares while they remain in
         escrow.

                  The Company has an employee stock option plan ("the Plan") to
         provide additional incentives to key employees, thereby helping to
         attract and retain the best available personnel. The Company applies
         APB Opinion 25 and related interpretations in accounting for the Plan.
         Accordingly, no compensation cost has been recognized for the Plan. The
         Company estimates the fair value of its stock options using the
         Black-Scholes option-pricing model. Had compensation cost for the
         Company's Plan been determined based on the fair value at the grant
         dates consistent with the FASB's Statement of Accounting Standards No.
         123, "Accounting for Stock-Based Compensation," the impact on net
         income and earnings per share would not have been significant for the
         years ended December 31, 1996 and 1995.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 52
<PAGE>   55

11.      employee benefit plan

         The Company maintains a defined contribution plan which allows
         employees to contribute up to 15% of their compensation to the plan.
         Employees who are at least 20 1/2 years of age and have completed 6
         months of service are eligible to participate in the plan. The Company
         is required to match 50% of employee contributions up to 3% of each
         employee's total compensation. The Company contributed approximately
         $153,000, $126,000 and $80,000 in matching funds to the plan during the
         years ended December 31, 1996, 1995 and 1994, respectively.

                  The Company amended the defined contribution plan effective
         April 1, 1990 to add a nonmatching, discretionary contribution as
         determined by the Board of Directors of the Company. In January 1997
         and 1996, the Company announced discretionary contributions of
         approximately $348,000 and $290,000 for the years ended 1996 and 1995
         respectively.

                  The Company maintains an "Employee Stock Purchase Plan"
         ("ESPP"). Substantially all employees of the Company who have been
         continuously employed for six months are eligible to participate in the
         ESPP under which Common Stock is issued at quarterly intervals for cash
         at a price of 90% of the fair market value of the stock. Under the
         ESPP, 7,955 shares were acquired by employees for $110,000 in 1996.
         There is no charge to income as a result of issuance of stock under
         this plan. The discount offered to employees approximates the cost of
         raising capital and does not have a material effect on net income and
         earnings per share. At December 31, 1996, 88,296 shares of common stock
         were reserved for issuance under this plan.

12.      commitments and contingent liabilities

         The employment agreement with Mr. Espe originally provided for an
         annual salary of $150,000 in 1994 through 1996. As part of the
         agreement, the Company provides a Supplementary Employee Retirement
         Plan ("SERP") based on a contribution of 10% of total compensation per
         year and earnings at a stated rate on that amount. The agreement has
         recently been amended, effective January 1, 1997, to extend the term to
         December 31, 2001 and to establish the minimum salary at $160,000.
         Also, the employment agreement with Mr. Philip has recently been
         amended, effective January 1, 1997, to extend the term to December 31,
         1998 and to establish his minimum annual salary at $175,000.

                  In 1993, Messrs. Espe and Philip each purchased 30,000 shares
         of the Company's common stock at the fair value of $12.00 per share at
         the date of purchase. The purchase of stock was financed by the Company
         with annual interest-only payments at 6% and principal due in April and
         July 2000.

                  The Company had Long Term Incentive Plan arrangements with
         Messrs. Espe and Philip. Under the arrangements, specific compensation
         and allowance payments were agreed to be made for work performed since
         1993 if the Company achieved certain performance objectives by December
         31, 1996. At December 31, 1996, the terms of the incentive plan were
         fulfilled, and in January 1997, $706,000 was paid under the terms of
         the plan. From 1993 through 1996, Mr. Philip received no salary or
         bonus payments.

                  In the normal course of business, the Company makes loan
         commitments (unfunded loans and unused lines of credit) and issues
         standby letters of credit to accommodate the financial needs of its
         customers. Standby letters of credit commit the Company to make
         payments on behalf of customers under specified conditions.
         Historically, no significant losses have been incurred by the Company
         under standby letters of credit. Both arrangements have credit risk
         essentially the same as that involved in extending loans to customers
         and are subject to the Company's normal credit policies, including the
         obtaining of collateral, where appropriate. At December 31, 1996 and
         1995, the Company's loan commitments amounted to $122.9 million and
         $72.8 million, respectively. Standby letters of credit were $1.6
         million and $1.5 million at December 31, 1996 and 1995, respectively.
         In addition, commitments under commercial letters of credit used to
         facilitate customers' trade transactions amounted to $2.5 million at
         December 31, 1996 and 1995.

                  The Company and its subsidiaries are from time to time
         defendants in and are threatened with various legal proceedings arising
         from their regular business activities. Management, after consulting
         with legal counsel, is of the opinion that the ultimate liability, if
         any, resulting from these and other pending or threatened actions and
         proceedings will not have a material effect on the financial position
         or results of operations of the Company and its subsidiaries.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 53
<PAGE>   56

13.      fair value of financial instruments

         The FASB's Statement of Financial Accounting Standards No. 107,
         "Disclosures about Fair Value of Financial Instruments" ("SFAS 107"),
         requires disclosure of fair value information about financial
         instruments, whether or not recognized in the balance sheet, for which
         it is practicable to estimate that value. "Fair Value" is defined in
         SFAS 107 as the amount at which an instrument could be exchanged in a
         current transaction between willing parties, other than a forced or
         liquidation sale.

                  The following table summarizes carrying amounts and estimated
         fair values of selected financial instruments as well as assumptions
         used by the Company in estimating fair value:

<TABLE>
<CAPTION>
                                                                        1996                      1995
                                                               ----------------------     ---------------------- 
in thousands                         Assumptions Used in        Carrying         Fair      Carrying         Fair
December 31,                         Estimating Fair Value        Amount        Value        Amount        Value
                                     ---------------------     ---------    ---------     ---------    ---------
<S>                                  <C>                       <C>          <C>           <C>          <C>      
Assets
            Cash and due             Approximately equal
            from banks               to carrying value         $  32,092    $  32,092     $  18,244    $  18,244

            Interest-earning         Approximately equal
            deposits with banks      to carrying value            38,086       38,086        12,635       12,635

            Securities available     Quoted market prices
            for sale                                              45,489       45,489        22,675       22,675

            Loans held for sale      Approximately equal
                                     to carrying value            11,341       11,341         1,367        1,367

            Loans                    Discounted expected
                                     future cash flows,
                                     net of allowance
                                     for loan losses             441,591      454,326       349,345      371,720

Liabilities

            Deposits                 Fixed-rate certificates
                                     of deposit: Discounted
                                     expected future
                                     cash flows

                                     All other deposits:
                                     Approximately
                                     equal to
                                     carrying value             $493,222     $489,206      $361,875     $360,609

            Federal Home             Discounted
            Loan Bank                expected future
            advances                 cash flows                   32,000       31,362        25,000       24,585

            Convertible              Discounted
            subordinated             expected future
            notes                    cash flows                                               2,695        2,695
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 54
<PAGE>   57

         Off-Balance-Sheet Financial Instruments

         The fair value of commitments is estimated based upon fees currently
         charged to enter into similar agreements, taking into account the
         remaining terms of the agreements and the present creditworthiness of
         the counterparties. For fixed rate commitments, the fair value
         estimation takes into consideration an interest rate risk factor. The
         fair value of guarantees and letters of credit is based on fees
         currently charged for similar agreements. The fair value of these
         off-balance sheet items at December 31, 1996 approximates the recorded
         amounts of the related fees.

14.      stock dividend

         On April 24, 1996, the Company announced a 5% stock dividend payable on
         May 22, 1996, to holders of record on May 8, 1996. On May 22, 1996,
         164,051 common shares were issued to shareholders. Average shares
         outstanding, net income per share and book value per share for all
         periods presented have been retro-actively adjusted to give effect to
         this transaction.

15.      SAIF special assessment

         Columbia Bank's deposits are insured by the FDIC through the Bank
         Insurance Fund and through the Saving Association Insurance Fund (the
         "SAIF"). SAIF-insured deposits of Columbia Bank are a result of a
         so-called Oakar transaction in which deposits were acquired from a
         savings bank. Legislation was enacted in 1996 for the purpose of
         recapitalizing the SAIF fund. The legislation required a special
         assessment on SAIF-insured deposits of approximately 65.7 cents per
         $100 of insured deposits at March 31, 1995 (SAIF deposits then $116.5
         million) with a discount of 20% on the special assessment of Oakar
         institutions, such as Columbia Bank, which meet certain tests. The
         one-time special assessment of $612,000, which is tax deductible, was
         recognized in third quarter 1996 earnings.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 55
<PAGE>   58

16.      parent company financial information

         condensed balance sheets
         parent company only

<TABLE>
<CAPTION>
in thousands
December 31,                                                 1996         1995
                                                            -------      -------
<S>                                                         <C>          <C>    
Assets
Cash and due from banks:
            Subsidiary banks                                $     6      $    41
            Unrelated banks                                                   68
Interest-earning deposits with banks:
            Subsidiary banks
            Unrelated banks                                   4,021
Securities available for sale                                 4,007
Loans                                                           720          905
Investments in bank subsidiaries                             49,951       32,660
Premises and equipment, net                                      28           49
Real estate owned                                                          3,304
Other assets                                                    429          354
                                                            -------      -------
            Total Assets                                    $59,162      $37,381
                                                            =======      =======
Liabilities and Shareholders' Equity
Other liabilities                                           $   202      $   119
Borrowed funds                                                             2,600
Convertible subordinated notes                                             2,695
                                                            -------      -------
            Total liabilities                                   202        5,414
Shareholders' equity                                         58,960       31,967
                                                            -------      -------
            Total Liabilities and Shareholders' Equity      $59,162      $37,381
                                                            =======      =======
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 56
<PAGE>   59

condensed statements of operations
parent company only

<TABLE>
<CAPTION>
            in thousands
years ended December 31,                                             1996          1995           1994
                                                                    -------       -------       -------
<S>                                                                 <C>           <C>           <C>    
Income
Interest on loans                                                   $    48       $    54       $    54
Interest on securities available for sale                                20                         188
Gains (losses) on securities available for sale (1)                                                (270)
Interest-earning deposits:
            Subsidiary banks                                                            6             9
            Unrelated banks                                              53            16            31
Other                                                                    55           533           470
                                                                    -------       -------       -------  
            Total income                                                176           609           482
Expense
Compensation and employee benefits                                      346           341           234
Interest                                                                204           377           246
Other                                                                   309           612           493
                                                                    -------       -------       -------  
            Total expenses                                              859         1,330           973
                                                                    -------       -------       -------  
Loss before income tax benefit and equity
            in undistributed net income (loss) of subsidiaries         (683)         (721)         (491)
                                                                    -------       -------       -------  
Income tax benefit
Loss before equity in undistributed
            net income (loss) of subsidiaries                          (683)         (721)         (491)
Equity in undistributed
            net income (loss) of subsidiaries:                        4,260         3,476          (123)
                                                                    -------       -------       -------  
Net Income (Loss)                                                   $ 3,577       $ 2,755       $  (614)
                                                                    =======       =======       =======
</TABLE>

(1)      In November 1994, the Parent Company sold a mortgage-backed security to
         Columbia Bank. A loss was recognized by the Parent Company while the
         security was recorded at fair value by Columbia Bank. The proceeds from
         the sale were subsequently contributed to the capital of Columbia Bank.
         On a consolidated basis the loss recorded by the Parent Company is
         eliminated as if no transaction had occurred.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 57
<PAGE>   60

condensed statements of cash flows
parent company only

<TABLE>
<CAPTION>
            in thousands
years ended December 31,                                               1996           1995           1994
                                                                     --------       --------       --------
<S>                                                                  <C>            <C>            <C>      
Operating Activities
Net income (loss)                                                    $  3,577       $  2,755       $   (614)
Adjustments to reconcile net income (loss) to
            net cash provided (used) by operating activities:
            Equity in undistributed (earnings) losses
               of subsidiaries                                         (4,260)        (3,476)           123
            Loss on sale of real estate owned                              41
            Provision for depreciation and amortization                    35             34             40
            Loss on sale of security available for sale                                                 270
            Net changes in other assets and liabilities                  (140)         2,698             80
                                                                     --------       --------       --------
               Net cash provided (used) by operating activities          (747)         2,011           (101)
Investing Activities
Proceeds from sales of securities available for sale                                                  2,808
Purchase of securities available for sale                              (4,000)
Proceeds from maturities of securities available
            for sale                                                                                    209
Loans originated or acquired, net of principal
            collected                                                     134
Contribution of capital - bank subsidiaries                           (16,800)        (3,100)        (2,813)
Return of capital to parent                                             3,800
Proceeds from sale of real estate owned                                 3,263
Purchases of premises and equipment                                                                      34
                                                                     --------       --------       --------
               Net cash provided (used) by investing activities       (13,603)        (3,100)           238
Financing Activities
Proceeds from other borrowings                                          7,000
Repayment of other borrowings                                          (9,600)
Proceeds from issuance of common stock                                 20,868            103             35
                                                                     --------       --------       --------
               Net cash provided by financing activities               18,268            103             35
                                                                     --------       --------       --------
                  Increase (decrease) in
                     cash and cash equivalents                          3,918           (986)           172
                  Cash and cash equivalents
                     at beginning of period                               109          1,095            923
                                                                     --------       --------       --------
               Cash and cash equivalents at end of period            $  4,027       $    109       $  1,095
                                                                     ========       ========       ========
Supplemental Information
Cash paid for interest                                               $    204       $    377       $    246
Issuance of common stock from
            conversion of convertible subordinated notes                2,509             40
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 58
<PAGE>   61

summary of quarterly financial information (1)

Quarterly financial information for the years ended December 31, 1996 and 1995
is summarized as follows:

<TABLE>
<CAPTION>
            in thousands                    First       Second        Third       Fourth    Year Ended
except per share amounts                  Quarter      Quarter      Quarter      Quarter  December 31,
                                          -------      -------      -------      -------  -----------
<S>                                       <C>          <C>          <C>          <C>      <C>    
1996
Total interest income                     $ 8,786      $ 9,311      $10,041      $10,924      $39,062
Total interest expense                      4,296        4,306        4,780        5,136       18,518
                                          -------      -------      -------      -------      -------
            Net interest income             4,490        5,005        5,261        5,788       20,544
Provision for loan losses                     330          430          330          330        1,420
Noninterest income                          1,165        1,308        1,390        1,445        5,308
Noninterest expense                         4,517        4,851        5,226        5,649       20,243
            SAIF special assessment                                     612                       612
                                          -------      -------      -------      -------      -------
            Income before income tax          808        1,032          483        1,254        3,577
                                          -------      -------      -------      -------      -------
Provision for income tax
Net income                                $   808      $ 1,032      $   483      $ 1,254      $ 3,577
                                          -------      -------      -------      -------      -------
Per share:
            Net income                    $  0.23      $  0.29      $  0.13      $  0.28      $  0.93
                                          =======      =======      =======      =======      =======
1995
Total interest income                     $ 6,942      $ 7,775      $ 8,373      $ 8,630      $31,720
Total interest expense                      3,093        3,699        4,092        4,275       15,159
                                          -------      -------      -------      -------      -------
            Net interest income             3,849        4,076        4,281        4,355       16,561
Provision for loan losses                     300          300          320          330        1,250
Noninterest income                            883          950        1,078        1,080        3,991
Noninterest expense                         3,987        4,124        4,267        4,169       16,547
                                          -------      -------      -------      -------      -------
            Income before income tax          445          602          772          936        2,755
                                          -------      -------      -------      -------      -------
Provision for income tax
Net income                                $   445      $   602      $   772      $   936      $ 2,755
                                          -------      -------      -------      -------      -------
Per share:
            Net income                    $  0.13      $  0.17      $  0.22      $  0.27      $  0.79
                                          =======      =======      =======      =======      =======
</TABLE>

(1)      These unaudited schedules provide selected financial information
         concerning the Company which should be read in conjunction with the
         Management's Discussion and Analysis of Financial Condition and Results
         of Operations in this Annual Report.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 59
<PAGE>   62

consolidated five-year
statements of operations(1)

<TABLE>
<CAPTION>
dollars in thousands,
except per share amounts
years ended December 31,                          1996             1995           1994              1993             1992
                                                --------         --------        --------         --------         --------
<S>                                             <C>              <C>             <C>              <C>              <C>     
Interest Income
Loans                                           $ 36,048         $ 30,038        $ 18,990         $ 12,258         $ 10,649
Investment securities                                               1,078           1,127            1,108               59
Securities available for sale                      1,878              290             205              227              639
Deposits with banks                                1,136              314             334              362              236
                                                --------         --------        --------         --------         --------
            Total interest income                 39,062           31,720          20,656           13,955           11,583

Interest Expense
Deposits                                          16,469           13,385           7,304            4,867            4,860
Federal Home Loan Bank advances                    1,865            1,503           1,160            1,788            1,328
Other borrowings                                     184              271             612              876              735
                                                --------         --------        --------         --------         --------
            Total interest expense                18,518           15,159           9,076            7,531            6,923
                                                --------         --------        --------         --------         --------
Net Interest Income                               20,544           16,561          11,580            6,424            4,660
Provision for loan losses                          1,420            1,250           1,000              502              170
                                                --------         --------        --------         --------         --------
            Net interest income after
               provision for loan losses          19,124           15,311          10,580            5,922            4,490
Noninterest income                                 5,308            3,991           2,996            2,043            1,021
Noninterest expense                               20,243           16,547          14,036           10,656            4,488
SAIF special assessment                              612
                                                --------         --------        --------         --------         --------
Noninterest expense                               20,855           16,547          14,036           10,656            4,488
                                                --------         --------        --------         --------         --------
            Income (loss) from
               continuing operations
               before income tax                   3,577            2,755            (460)          (2,691)           1,023
Provision for income tax
                                                --------         --------        --------         --------         --------
            Income (loss) from
               continuing operations               3,577            2,755            (460)          (2,691)           1,023
Extraordinary loss on
            extinguishment of debt, net                                              (154)
Cumulative effect of
            accounting change                                                                          252
                                                --------         --------        --------         --------         -------- 
Net Income (Loss)                               $  3,577         $  2,755        $   (614)        $ (2,439)        $  1,023
                                                ========         ========        ========         ========         ========
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 60
<PAGE>   63

<TABLE>
<CAPTION>
   dollars in thousands,
except per share amounts
years ended December 31,                              1996             1995            1994              1993            1992
                                                   -----------      -----------     -----------      -----------      -----------
<S>                                                <C>              <C>             <C>              <C>              <C>        
Per share (on average
     shares outstanding):
               Income (loss) from
                  continuing operations            $   0.93         $   0.79        $  (0.13)        $  (1.17)        $   0.89
               Extraordinary loss on
                  extinguishment
                  of debt, net                                                         (0.05)
               Cumulative effect of
                  accounting change                                                                      0.11
               Net income (loss)                       0.93             0.79           (0.18)           (1.06)            0.89
               Fully diluted net income (loss)         0.92             0.79           (0.18)           (1.06)            0.76
Average number of common
     and common equivalent
     shares outstanding:
               Primary                                3,866            3,496           3,481            2,301            1,155
               Fully diluted                          4,047            3,752           3,740            2,560            1,700
                                                   -----------      -----------     -----------      -----------      -----------
Total assets at end of period                      $588,916         $425,206        $319,072         $235,944         $158,694
Long-term obligations                                32,000           27,695          19,735           39,081           27,975
Cash dividends
                                                   -----------      -----------     -----------      -----------      -----------
</TABLE>

(1)      These unaudited schedules provide selected financial information
         concerning the Company which should be read in conjunction with the
         Management Discussion and Analysis of Financial Condition and Results
         of Operations in this Annual Report.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 61
<PAGE>   64
consolidated five-year summary of average

<TABLE>
<CAPTION>
                                                                1996                                      1995
                                                Average                     Average       Average                      Average
          dollars in thousands                 Balances(1)    Interest        Rate       Balances(1)    Interest        Rate
                                               -----------   -----------   -----------   -----------   -----------   -----------
<S>                                            <C>           <C>           <C>           <C>           <C>           <C>
Interest-Earning Assets
Loans:
            Commercial business                $   136,386   $    11,782          8.64%  $    92,831   $     8,986          9.68%
            Real estate (2):
               One- to four-family
                  residential                       93,471         8,420          9.01        97,280         9,073          9.33
               Five or more family
                  residential and
                  commercial properties            126,061        11,556          9.17        90,135         8,411          9.33
            Consumer                                49,213         4,290          8.72        37,793         3,568          9.44
                                               -----------   -----------   -----------   -----------   -----------   -----------
               Total loans                         405,131        36,048          8.90       318,039        30,038          9.44
Securities                                          31,527         1,878          5.96        23,266         1,368          5.89
Interest-earning deposit with banks                 21,416         1,136          5.31         5,336           314          5.88
                                               -----------   -----------   -----------   -----------   -----------   -----------
               Total interest-earning assets       458,074        39,062          8.53       346,641        31,720          9.15
Noninterest-earning assets                          31,177                                    28,007
                                               -----------                               -----------                            
               Total assets                    $   489,251                               $   374,648
                                               -----------                               -----------                            
Interest-Bearing Liabilities
Certificates of deposit                        $   189,122   $    10,712          5.66%  $   168,351   $     9,565          5.68%
Savings accounts                                    21,673           608          2.80        24,547           669          2.73
Interest-bearing demand                            142,103         5,149          3.62        79,706         3,151          3.95
                                               -----------   -----------   -----------   -----------   -----------   -----------
               Total interest-bearing
                  deposits                         352,898        16,469          4.67       272,604        13,385          4.91
Federal Home Loan Bank advances                     33,287         1,865          5.60        24,915         1,503          6.03
Other borrowings                                     1,990           184          9.25         2,744           271          9.88
                                               -----------   -----------   -----------   -----------   -----------   -----------
               Total interest-bearing
                  liabilities                      388,175        18,518          4.77       300,263        15,159          5.05
Demand and other noninterest-bearing
            deposits                                60,691                                    42,167
Other noninterest-bearing
            liabilities                              3,439                                     2,444
Shareholders' equity                                36,946                                    29,774
                                               -----------                               -----------                            
               Total liabilities and
                  shareholders' equity         $   489,251                               $   374,648
                                               -----------   -----------   -----------   -----------   -----------   -----------
               Net interest revenue                          $    20,544                               $    16,561
                                               -----------   -----------   -----------   -----------   -----------   -----------
               Net interest spread                                                3.76%                                     4.10%
                                               -----------   -----------   -----------   -----------   -----------   -----------
               Net interest margin                                                4.48%                                     4.78%
                                               -----------   -----------   -----------   -----------   -----------   -----------
Average interest-earning assets to average 
            interest-bearing liabilities                                        118.01%                                   115.45%
                                               -----------   -----------   -----------   -----------   -----------   -----------
</TABLE>


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 62.
<PAGE>   65

balances and net interest revenue

<TABLE>
<CAPTION>
                                                                1994                                        1993
                                                Average                       Average      Average                      Average
          dollars in thousands                 Balances(1)    Interest         Rate       Balances(1)     Interest       Rate
                                               -----------   -----------   -----------    -----------   -----------   -----------
<S>                                            <C>           <C>           <C>            <C>           <C>           <C>
Interest-Earning Assets
Loans:
            Commercial business                $    63,541   $     5,272          8.30%   $    23,894   $     1,690          7.07%
            Real estate (2):
               One- to four-family
                  residential                       78,408         6,495          8.28         73,076         6,221          8.51
               Five or more family
                  residential and
                  commercial properties             57,952         5,324          9.19         35,255         3,608         10.23
            Consumer                                22,335         1,899          8.50          8,128           739          9.09
                                               -----------   -----------   -----------    -----------   -----------   -----------
               Total loans                         222,236        18,990          8.54        140,353        12,258          8.73
Securities                                          24,045         1,332          5.54         20,940         1,335          6.38
Interest-earning deposits with banks                 8,597           334          3.89         12,800           362          2.83
                                               -----------   -----------   -----------    -----------   -----------   -----------
               Total interest-earning assets       254,878        20,656          8.10        174,093        13,955          8.02
Noninterest-earning assets                          24,384                                     15,825
                                               -----------                                -----------                              
               Total assets                    $   279,262                                $   189,918
                                               -----------                                -----------   
Interest-Bearing Liabilities
Certificates of deposit                        $   122,198   $     5,595          4.58%   $    75,682   $     3,459          4.57%
Savings accounts                                    33,938           895          2.64         29,743         1,039          3.49
Interest-bearing demand                             38,962           814          2.09         18,090           369          2.04
                                               -----------   -----------   -----------    -----------   -----------   -----------
               Total interest-bearing
                  deposits                         195,098         7,304          3.74        123,515         4,867          3.94
Federal Home Loan Bank advances                     21,452         1,160          5.41         25,875         1,788          6.91
Other borrowings                                     6,017           612         10.17          9,868           876          8.88
                                               -----------   -----------   -----------    -----------   -----------   -----------
               Total interest-bearing
                  liabilities                      222,567         9,076          4.08        159,258         7,531          4.73
Demand and other noninterest-bearing deposits       26,238                                     10,621
Other noninterest-bearing liabilities                1,476                                        923
Shareholders' equity                                28,981                                     19,116
                                               -----------                                -----------                            
               Total liabilities and
                  shareholders' equity         $   279,262                                $   189,918
                                               -----------   -----------   -----------    -----------   -----------   -----------
               Net interest revenue                          $    11,580                                $     6,424
                                               -----------   -----------   -----------    -----------   -----------   -----------
               Net interest spread                                                4.02%                                      3.29%
                                               -----------   -----------   -----------    -----------   -----------   -----------
               Net interest margin                                                4.54%                                      3.69%
                                               -----------   -----------   -----------    -----------   -----------   -----------
Average interest-earning assets to average
            interest-bearing liabilities                                        114.52%                                    109.32%
                                               -----------   -----------   -----------    -----------   -----------   -----------
</TABLE>

<TABLE>
<CAPTION>
                                                                1992
                                                Average                      Average
          dollars in thousands                 Balances(1)     Interest       Rate
                                               -----------   -----------   -----------
<S>                                            <C>           <C>           <C>
Interest-Earning Assets
Loans:
            Commercial business                $    15,949   $     1,501          9.41%
            Real estate (2):
               One- to four-family
                  residential                       61,461         6,120          9.96
               Five or more family
                  residential and
                  commercial properties             24,086         2,463         10.23
            Consumer                                 5,686           565          9.94
                                               -----------   -----------   -----------
               Total loans                         107,182        10,649          9.94
Securities                                           9,382           698          7.44
Interest-earning deposits with banks                 6,416           236          3.68
                                               -----------   -----------   -----------
               Total interest-earning assets       122,980        11,583          9.42
Noninterest-earning assets                         14,295
                                               -----------                              
               Total assets                    $   137,275
                                               -----------                               
Interest-Bearing Liabilities
Certificates of deposit                        $    57,072   $     3,331          5.84%
Savings accounts                                    25,087         1,059          4.22
Interest-bearing demand                             12,976           470          3.62
                                               -----------   -----------   -----------
               Total interest-bearing
                  deposits                          95,135         4,860          5.11
Federal Home Loan Bank advances                     16,282         1,328          8.16
Other borrowings                                     7,730           735          9.51
                                               -----------   -----------   -----------
               Total interest-bearing
                  liabilities                      119,147         6,923          5.81
Demand and other noninterest-bearing deposits        3,416
Other noninterest-bearing liabilities                5,673
Shareholders' equity                                 9,039
                                               -----------   
               Total liabilities and
                  shareholders' equity         $   137,275
                                               -----------   -----------   -----------
               Net interest revenue                          $     4,660
                                               -----------   -----------   -----------
               Net interest spread                                                3.61%
                                               -----------   -----------   -----------
               Net interest margin                                                3.79%
                                               -----------   -----------   -----------
Average interest-earning assets to average
            interest-bearing liabilities                                        103.22%
                                               -----------   -----------   -----------
</TABLE>

1        Loans on a nonaccrual status have been included in the computation of
         average balances.

2        Real estate average balances include real estate construction loans.


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 63.
<PAGE>   66

corporate directory

Board of
Directors

W. Barry Connoley
President and
Chief Executive Officer,
MultiCare Medical Center

Richard S. DeVine
President,
Chinook Resources, Inc.
Chairman, Raleigh,
Schwarz & Powell, Inc.

A. G. Espe
Chairman and
Chief Executive Officer,
Columbia Banking System, Inc.
Chairman, Columbia Bank

Jack Fabulich
Chairman, Parker Paint
Manufacturing Co., Inc.
President and Commissioner,
Port of Tacoma

Jonathan Fine
Chief Operating Officer,
American Red Cross,
Seattle-King County Chapter

Margel S. Gallagher
President, Viva Imports, Ltd.

John A. Halleran
Private Investor

W. W. Philip
President and
Chief Operating Officer,
Columbia Banking System, Inc.
President and Chief Executive
Officer, Columbia Bank

John H. Powell
President and Co-owner,
Sound Oil Company

Robert E. Quoidbach
Private Investor

Donald Rodman
Owner and Vice President,
Rodman Realty, Inc.

Frank H. Russell
President, Professional Services
Unified, Inc. and
Quality Meal Expeditors

Sidney R. Snyder
Washington State Senator,
Owner of Sid's Food Market
and Midtown Market

James M. Will
President,
Titus-Will Enterprises


Executive
Officers

A. G. Espe
Chairman and
Chief Executive Officer

W. W. Philip
President and
Chief Operating Officer

Donald A. Andersen
Senior Vice President,
Loan Administration

Julie A. Healy
Senior Vice President,
Operations Manager

H. R. Russell
Senior Vice President,
Loan Production

Gary R. Schminkey
Senior Vice President,
Chief Financial Officer

Evans Q. Whitney
Senior Vice President,
Human Resources Director


Senior Officers

Stan Ausmus
Senior Vice President,
Puyallup Branch Manager

Melanie J. Dressel
Senior Vice President,
Private Banking Manager

Alan W. Fulp
Senior Vice President,
Bellevue Branch Manager

Bret M. Gagliardi
Senior Vice President,
Commercial Loans,
Kent Valley

Gary Gahan
Senior Vice President,
Private Banking

Kurt Graff
Senior Vice President,
Lakewood Branch Manager

Eugene Horan
Senior Vice President,
Fircrest Branch Manager

Trent Jonas
Senior Vice President,
Commercial Loans,
Gig Harbor

Gary Lindberg
Senior Vice President,
Commercial Loans

Richard B. Martinez
Senior Vice President,
Private Banking, Bellevue

Samuel R. Noel
Executive Vice President,
Southwest Region

Ronald D. Staples
Senior Vice President,
Allenmore Branch Manager

Loran W. Todd
Senior Vice President,
General Auditor

Rick W. Tunnell
Senior Vice President,
Real Estate

Brett R. Willis
Senior Vice President,
Commercial Loans

Kenneth M. Yokoyama
Senior Vice President,
Commercial Loans, Bellevue


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 64.
<PAGE>   67

shareholder information


Corporate
Headquarters

Columbia Banking System, Inc.
1102 Broadway Plaza
P.O. Box 2156
Tacoma, WA  98401-2156
(206) 305-1900*


Independent
Accountants

Price Waterhouse LLP


Transfer Agent
and Registrar

American Stock Transfer &
Trust Company


Market
Makers

Alex. Brown & Sons Inc.
Dain Bosworth, Inc.
Dean Witter Reynolds, Inc.
Everen Securities, Inc.
Herzog, Heine, Geduld, Inc.
Keefe, Bruyette & Woods, Inc.
Ragen MacKenzie Inc.


Legal Counsel

Gordon, Thomas, Honeywell,
Malanca, Peterson & Daheim,
PLLC


Annual Meeting

Sheraton Tacoma Hotel
1320 Broadway Plaza
Tacoma, Washington
Wednesday,  April 23, 1997
1:00 p.m.


Stock
Listing

The Company's common
stock trades on the Nasdaq
National Market tier of
The Nasdaq Stock Market(sm)
under the symbol:  COLB.


Form 10-K Report

Upon request, Columbia
Banking System provides to
shareholders a copy of the
1996 Annual Report on
Form 10-K, as filed with
the Securities and Exchange
Commission.  There is no
charge for this information.


Quarterly
Reporting

In the interest of providing
financial results in a timely
and cost-effective manner,
the Company does not
publish a formal quarterly
report. A copy of the
quarterly earnings news
release is available upon
request.

Immediate access to
the Company's quarterly
earnings news release via
facsimile is provided by
Company News On Call:
(800) 758-5804,
access #152519


For shareholder information,
please contact:
Kristen Kopay
Marketing Officer
Corporate Communications
P.O. Box 2156, MS 8300
Tacoma, WA  98401-2156
tel   (206) 305-1965*
fax   (206) 305-0317*
E-mail: [email protected]



* area code will change
to (253) effective
April 25, 1997


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 65
<PAGE>   68

locations


Pierce County

Main Office
1102 Broadway Plaza
Tacoma, WA  98402
(206) 305-1920*
John Collins

Allenmore
1959 South Union
Tacoma, WA  98405
(206) 627-6909*
Ron Staples

Edgewood/Milton
900 Meridian E., Suite 17
Milton, WA  98354
(206) 952-6646*
Michael Butcher

[A map of Western Washington
indicating the Company's market
area with existing and approved
branch locations marked by
location.]

Fircrest
2401 Mildred Street W.
Fircrest, WA  98466
(206) 566-1172*
Gene Horan

Gig Harbor
5311 Point Fosdick Dr. N.W.
Gig Harbor, WA  98335
(206) 858-5105*
Marilyn Naylor

Lakewood
6202 Mount Tacoma Dr. S.W.
Lakewood, WA  98499
(206) 581-4232*
Kurt Graff

Old Town
2200 North 30th Street
Tacoma, WA  98403
(206) 272-0412*
Priscilla May

Puyallup
4220 S. Meridian
Puyallup, WA  98373
(206) 770-0770*
Stan Ausmus

South Hill Mall
3500 S. Meridian, Suite 503
Puyallup, WA  98373
(206) 770-8161*
Robin Conrads
Stacy Gibson

Spanaway
220 South 175th
Spanaway, WA  98387
(206) 539-3094*
Joy Johnson

Summit
10409 Canyon Road E.
Puyallup, WA  98373
(206) 770-9323*
Mike Williams


King County

Bellevue
777 108th Avenue N.E., Suite 100
Bellevue, WA  98004
(206) 646-9696+
Alan Fulp

Bellevue Way (February 1997)
10350 N.E. 10th Street
Bellevue, WA  98004
(206) 452-7323+
Stacy Sullivan

Federal Way
33370 Pacific Highway S.
Federal Way, WA  98003
(206) 925-9323
Chuck Folsom

Kent (March 1997)
112 Washington Avenue N.
Kent, WA  98032
(206) 852-0475*
Patty Osthus


Cowlitz County

Commerce
1338 Commerce Avenue
Longview, WA  98632
(360) 636-9200
Barbara Perret-Brusco

30th Avenue
2207 30th Avenue
Longview, WA  98632
(360) 423-8760
Sheryl Vlach

Woodland
782 Goerig Street
Woodland, WA  98674
(360) 225-9421
Carol Rounds

* area code will change
  to (253) effective
  April 25, 1997

+ area code will change
  to (425) effective
  April 25, 1997


                         COLUMBIA BANKING SYSTEM, INC.
                                    page 66
<PAGE>   69


                             [ COLUMBIA BANK LOGO ]


                              1102 BROADWAY PLAZA
                            TACOMA, WASHINGTON 98402

                              www.columbiabank.com

<PAGE>   1





                                   Exhibit 24
<PAGE>   2





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                   Title




/s/ W. Barry Connoley                                       Director
- ---------------------------------
W. Barry Connoley
<PAGE>   3





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                           Title




/s/ Richard S. DeVine                                               Director
- ---------------------------------
Richard S. DeVine
<PAGE>   4





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                           Title




/s/ Jack Fabulich                                                   Director
- ---------------------------------
Jack Fabulich
<PAGE>   5





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                           Title




/s/ Jonathan Fine                                                   Director
- ---------------------------------
Jonathan Fine
<PAGE>   6





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                           Title




/s/ Margel Gallagher                                                Director
- ---------------------------------
Margel Gallagher
<PAGE>   7





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                 Title




/s/ John A. Halleran                                      Director
- ---------------------------------
John A. Halleran
<PAGE>   8





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                 Title




/s/ Robert Quoidbach                                      Director
- ---------------------------------
Robert Quoidbach
<PAGE>   9





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                 Title




/s/ Donald Rodman                                         Director
- ---------------------------------
Donald Rodman
<PAGE>   10





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                 Title




/s/ Frank Russell                                         Director
- ---------------------------------
Frank Russell
<PAGE>   11





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                 Title




/s/ Sidney R. Snyder                                      Director
- ---------------------------------
Sidney R. Snyder
<PAGE>   12





                               POWER OF ATTORNEY

         The director of Columbia Banking System, Inc. (the "Company"), whose
signature appears below, hereby appoints Arnold G. Espe, W. W.  Philip and J.
James Gallagher, or either of them, as his attorney to sign, in his name and
behalf and in any and all capacities stated below, the Company's Form 10-K
Annual Report pursuant to Section 13 of the Securities Exchange Act of 1934,
and likewise to sign any and all amendments and other documents relating
thereto as shall be necessary, such person hereby granting to each such
attorney power to act with or without the other and full power of substitution
and revocation, and hereby ratifying all that any such attorney or his
substitute may do by virtue hereof.

         This Power of Attorney has been signed by the following person in the
capacity indicated, on the 26 day of February, 1997.


Signature                                                 Title




/s/ James M. Will, Jr.                                    Director
- ---------------------------------
James M. Will, Jr.
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 9
<CIK> 0000887343
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
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</TABLE>


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