DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
N-30D, 1998-11-24
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DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

LETTER TO SHAREHOLDERS

Dear Shareholder:

  We  are  pleased  to  provide you with this report on the Dreyfus Pennsylvania
Municipal  Money  Market  Fund for the 12-month period ended September 30, 1998.
Your Fund produced a yield of 3.01% and, after taking into account the effect of
compounding, the effective yield was 3.05%.*

THE ECONOMY

  The  risk of global recession loomed large by the end of the reporting period.
Since  last  summer,  the international economic crisis has spread from Asia and
Russia  into Latin America and its effects are evident in the U.S., as witnessed
by  early  signs  of  a  slowing  in  our domestic economy. Second-quarter gross
domestic product grew at an annual rate of 1.8%, well below the 5.5% rate in the
first  quarter,  while  the  trade  deficit  has continued to widen, affected by
weakening  foreign  demand  and  low-priced  imports.  These  developments  have
heightened  a  sense  of  global economic interdependence and have resulted in a
shift  in  emphasis by the Federal Reserve Board, whereby fighting inflation has
taken  a subordinate role to that of maintaining stable U.S. economic growth. On
September 29, the Federal Open Market Committee cut interest rates for the first
time  since  January  1996.  That  quarter-point  reduction in the Federal Funds
target rate to 5.25% was designed to cushion the adverse effects of the overseas
economic  crisis on the domestic economy. The Federal Funds rate is the interest
rate that banks charge each other for overnight loans.

  While  the  corporate sector wrestles with the economic implications of global
developments, consumers have powered the economy. The reasons for their optimism
are  no  surprise. Inflation remains tame, running at an annual rate comfortably
below  2% . After-tax income is growing and jobs are plentiful: the unemployment
rate  has  been  at or near 30-year lows throughout the reporting period and new
jobs  have  been  created  at  a  robust pace. The consumer sector comprises two
thirds  of  the  activity in the $8-trillion U.S. economy and, with the business
sector  slowing,  any significant pullback in household spending could trigger a
recession.  Up  to  now,  the spillover effect from developments abroad has been
largely  confined  to the manufacturing sector, whose activity has contracted of
late due to the falloff in export demand. Aside from this "erosion at the edges"
as  Fed  Chairman  Alan  Greenspan  describes  it, layoffs on a broader scale--a
factor that could weaken consumer resolve to spend--so far have not occurred. It
is clear that the Fed is concerned about the possibility of worldwide recession.
The  recent  October  interest rate reduction was a major step by the Fed toward
mitigating the domestic effects of international financial turmoil and a gesture
meant to serve notice to the world of the seriousness of its purpose.

MARKET ENVIRONMENT/PORTFOLIO STRATEGY

The Fed's action to reduce the target rate for Fed Funds provided even greater
strength  to  the  short-term  municipal money market. Prior to this action, the
short-term  market  had  already  felt  the  effects of the diminished supply of
eligible  new  issuance  over  the summer months. This year's summer calendar of
municipal  notes (consisting mainly of California paper) was drastically reduced
by  a  combination of factors. Due to the strength of local and state economies,
several issuers reduced the amount of short-term borrowing needed. Additionally,
unlike  prior years, many issuers came to market with securities with maturities
beyond  the 13-month maximum restriction allowable for money funds. Other issues
were  converted  to  a  synthetic  structure that is not currently permitted for
purchase  in  your  Fund. The overall result was a lower yield for most one-year
paper,    both    national    and    state    specific.

  We  extended your Fund's average maturity to the 70-day range in early summer,
just prior to the market strengthening. Your Fund benefited from our purchase of
securities  in  the  one-year  range at yields significantly higher than what is
currently  available  in  the market. In mid-summer, yields began to drop and we
utilized the commercial paper market to maintain the Fund's average maturity. In
the  months  ahead, we will continue to participate in the tax-exempt commercial
paper  market  as  a means of extension while yields in the one-year note market
remain  aggressive.  In  the event of any market weakness, we would consider, if
supply  conditions  allow,  additional purchases of Pennsylvania-exempt notes in
the  one-year range. As always, we will structure the portfolio in an attempt to
maximize  current  yield  while  maintaining  our  commitment  to  high  quality
tax-exempt investments.

               Very truly yours,


               [Richard J. Moynihan signature logo]



               Richard J. Moynihan

               Director, Municipal Portfolio Management

               The Dreyfus Corporation

October 16, 1998

New York, N.Y.

* Effective yield is based upon dividends declared daily and reinvested monthly

<TABLE>
DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------


STATEMENT OF INVESTMENTS                                   SEPTEMBER 30, 1998

                                                                                                   Principal

Tax Exempt Investments--98.5%                                                                       Amount            Value

                                                                                                _____________     _____________

Pennsylvania--94.3%

Allegheny County Hospital Development Authority:
<S>                                                                                            <C>               <C>
  HR (South Hills Health System) 4.25%, 3/31/99 (LOC; PNC Bank). . . . . . . . . . . . . .     $    3,500,000    $    3,508,383

  Revenue, VRDN:

    Refunding (Saint Francis Health Center)

       3.95% (LOC; First National Bank of Chicago) (a) . . . . . . . . . . . . . . . . . .          4,000,000         4,000,000

    (Saint Francis Medical Center)

       3.75%, Series A (LOC; First National Bank of Chicago) (a).  . . . . . . . . . . . .         10,000,000        10,000,000

Allegheny Industrial Development Authority, Revenue, VRDN

  (Longwood at Oakmont Project) 4.10%, Series B (LOC; Dresdner Bank) (a) . . . . . . . . .          4,900,000         4,900,000

Bucks County Industrial Development Authority, IDR, VRDN (Oxford Falls Project)

  4.15% (Corp. Guaranty; Household Finance Corp.) (a)  . . . . . . . . . . . . . . . . . .            900,000           900,000

Butler County Industrial Development Authority, Revenue (Lutheran Welfare)

  3.80%, Series A, 11/1/98 (LOC; PNC Bank) . . . . . . . . . . . . . . . . . . . . . . . .          7,260,000         7,260,000

Carbon County Industrial Development Authority, RRR, CP (Panther Creek Partners
Project):

  3.50%, 11/18/98 (LOC; National Westminster Bank) . . . . . . . . . . . . . . . . . . . .          2,000,000         2,000,000

  3.60%, Series A, 12/18/98 (LOC; National Westminster Bank) . . . . . . . . . . . . . . .          4,000,000         4,000,000

  3.40%, Series A, 1/21/99 (LOC; National Westminster Bank)  . . . . . . . . . . . . . . .          3,000,000         3,000,000

Dauphin County General Authority, VRDN (Allied Health Pooled Financing Program)

  3.65%, Series B (Insured; FSA and Liquidity Facility; Credit Suisse) (a) . . . . . . . .          5,000,000         5,000,000

Doylestown Hospital Authority, HR, VRDN (Doylestown)

  3.15%, Series B (Insured; AMBAC and Liquidity Facility; PNC Bank) (a)  . . . . . . . . .          5,500,000         5,500,000

Emmaus General Authority, Revenue, VRDN:

  3.60%, Sub-Series 7 (GIC; Goldman Sachs and Co.) (a).  . . . . . . . . . . . . . . . . .          1,200,000         1,200,000

  3.60%, Sub-Series 7 (Insured; FSA and Liquidity Facility; Credit Suisse) (a) . . . . . .          5,000,000         5,000,000

Erie County Industrial Development Authority, Revenue, VRDN:

  (Hamot Health Foundation)
    4.05% (Insured; AMBAC and Liquidity Facility; National City Bank) (a)  . . . . . . . .          6,630,000         6,630,000

  (McInnes Steel Co. Project) 4.15% (LOC; Huntington National Bank) (a). . . . . . . . . .          1,100,000         1,100,000

Lebanon County Health Facility Authority, Health Center Revenue, VRDN

  (United Church Christ Homes) 3.65% (LOC; Allied Irish Banks) (a) . . . . . . . . . . . .          3,800,000         3,800,000

Lehigh County Industrial Development Authority, Industrial and Commercial

 Development Revenue, VRDN (Radnor/Lehigh Corp. Project)

  4.125% (LOC; Dresdner Bank) (a). . . . . . . . . . . . . . . . . . . . . . . . . . . . .          8,065,000         8,065,000

Montgomery County Industrial Development Authority, Revenue, CP

  3.40%, 1/26/99 (LOC; Deutsche Bank)  . . . . . . . . . . . . . . . . . . . . . . . . . .          2,250,000         2,250,000

Pennsylvania Economic Development Finance Authority, Exempt Facility Revenue,
VRDN

  (National Gypsum Co. Project) 3.95%, Series A (LOC; Nationsbank) (a) . . . . . . . . . .          1,500,000         1,500,000

Pennsylvania Higher Education Assistance Agency, Student Loan Revenue, VRDN

  3.80%, Series B (LOC; Student Loan Marketing Association) (a). . . . . . . . . . . . . .          4,500,000         4,500,000

Pennsylvania Higher Educational Facilities Authority:

 CICU Financing Program Revenue (Saint Francis College)

    4.50%, Series B-7, 11/1/98 (LOC; Allied Irish Banks) . . . . . . . . . . . . . . . . .          3,000,000         3,001,540

  Council Independent Colleges (Saint Josephs University)

    3.58%, 3/31/99 (LOC; First Union National Bank)  . . . . . . . . . . . . . . . . . . .          3,400,000         3,400,000

DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
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STATEMENT OF INVESTMENTS (CONTINUED)                       SEPTEMBER 30, 1998

                                                                                                 Principal

Tax Exempt Investments (continued)                                                                 Amount             Value
- -------------------------------------------------------                                         _____________     _____________

Pennsylvania (continued)

Pennsylvania Turnpike Commission, Oil Franchise Tax Revenue

  4.80%, Series A, 12/1/98 (Insured; AMBAC)  . . . . . . . . . . . . . . . . . . . . . . .     $    2,500,000    $    2,504,865

Philadelphia, TRAN 4.25%, Series A, 6/30/99. . . . . . . . . . . . . . . . . . . . . . . .          5,000,000         5,022,081

Philadelphia Authority, IDR, VRDN (Institute for Cancer Research Project)

  4.15%, Series A (LOC; Morgan Guaranty Trust Co.) (a) . . . . . . . . . . . . . . . . . .            100,000           100,000

Philadelphia School District, TRAN
  4.25%, Series A, 6/3/99 (LOC; First Union National Bank) . . . . . . . . . . . . . . . .          5,000,000         5,021,693

Schuylkill County Industrial Development Authority, Revenue, VRDN

  (Pine Grove Landfill Inc.) 4.30% (LOC; Bank of Boston) (a).  . . . . . . . . . . . . . .          9,700,000         9,700,000

Venango Industrial Development Authority, RRR, CP (Scrubgrass Project):

  3.60%, 12/14/98 (LOC; National Westminster Bank) . . . . . . . . . . . . . . . . . . . .          2,700,000         2,700,000

Washington County Authority, LR, VRDN (Higher Education Pooled Equipment Lease)

  3.65%, Series A (LOC; First Union National Bank of North Carolina) (a) . . . . . . . . .          4,055,000         4,055,000

U.S. Related--4.2%

Commonwealth of Puerto Rico Government Development Bank, CP

  3.50%, 11/18/98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          5,294,000         5,294,000

                                                                                                                  _____________

TOTAL INVESTMENTS (cost $124,912,562). . . . . . . . . . . . . . . . . . . . . . . . . . .              98.5%      $124,912,562

                                                                                                      _______     _____________


CASH AND RECEIVABLES (NET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               1.5%    $    1,885,352

                                                                                                      _______     _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             100.0%      $126,797,914

                                                                                                      _______     _____________


DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
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Summary of Abbreviations
- -----------------------------------------------------------------------------

AMBAC       American Municipal Bond Assurance Corporation           LOC         Letter of Credit

CP          Commercial Paper                                        LR          Lease Revenue

FSA         Financial Security Assurance                            RRR         Resources Recovery Revenue

HR          Hospital Revenue                                        TRAN        Tax and Revenue Anticipation Notes

GIC         Guaranteed Investment Contract                          VRDN        Variable Rate Demand Notes

IDR         Industrial Development Revenue

Summary of Combined Ratings (Unaudited)
- -----------------------------------------------------------------------------

Moody's              or            Standard & Poor's                 Percentage of Value

________                           _________________                 ___________________

VMIG1/MIG1                         SP1+/SP1, A1+/A1                          91.5%

Aaa/Aa (b)                         AAA/AA (b)                                 8.5

                                                                           _______

                                                                            100.0%

                                                                           _______


Notes to Statement of Investments:
- -----------------------------------------------------------------------------

(a)  Securities payable on demand. Variable interest rate--subject to periodic
     change.

(b)  Notes which are not MIG or SP rated are represented by bond ratings ofthe
     issuers.

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>
DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
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STATEMENT OF ASSETS AND LIABILITIES                        SEPTEMBER 30, 1998

                                                                                                     Cost             Value

                                                                                                _____________     _____________
<S>                                                                                              <C>               <C>
ASSETS:                          Investments in securities--See Statement of Investments . .     $124,912,562      $124,912,562

                                 Cash  . . . . . . . . . . . . . . . . . . . . . . . . . .                            1,206,957

                                 Interest receivable . . . . . . . . . . . . . . . . . . .                              779,898

                                                                                                                _____________

                                                                                                                    126,899,417

                                                                                                                  _____________

LIABILITIES:                     Due to The Dreyfus Corporation and affiliates . . . . . .                               56,839

                                 Accrued expenses  . . . . . . . . . . . . . . . . . . . .                               44,664

                                                                                                                  _____________

                                                                                                                        101,503

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $126,797,914

                                                                                                                  _____________


REPRESENTED BY:                  Paid-in capital . . . . . . . . . . . . . . . . . . . . .                         $126,826,517

                                 Accumulated net realized gain (loss) on investments . . .                             (28,603)

                                                                                                                  _____________

NET ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         $126,797,914

                                                                                                                  _____________

SHARES OUTSTANDING

(UNLIMITED NUMBER OF $.001 PAR VALUE SHARES OF BENEFICIAL INTEREST AUTHORIZED) . . . . . .                          126,826,517

NET ASSET VALUE, offering and redemption price per share . . . . . . . . . . . . . . . . .                                $1.00

                                                                                                                         ______


                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>
DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
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STATEMENT OF OPERATIONS                         YEAR ENDED SEPTEMBER 30, 1998

INVESTMENT INCOME
<S>                                                                                               <C>                <C>
INCOME                           Interest Income . . . . . . . . . . . . . . . . . . . . .                           $4,567,539

EXPENSES:                        Management fee--Note 2(a) . . . . . . . . . . . . . . . .        $   623,768

                                 Shareholder servicing costs--Note 2(b)  . . . . . . . . .             80,783

                                 Professional fees . . . . . . . . . . . . . . . . . . . .             50,614

                                 Registration fees . . . . . . . . . . . . . . . . . . . .             15,545

                                 Custodian fees  . . . . . . . . . . . . . . . . . . . . .             14,346

                                 Prospectus and shareholders' reports  . . . . . . . . . .             11,568

                                 Trustees' fees and expenses--Note 2(c)  . . . . . . . . .              8,491

                                 Miscellaneous . . . . . . . . . . . . . . . . . . . . . .              5,714

                                                                                                  ___________

                                    Total Expenses . . . . . . . . . . . . . . . . . . . .                              810,829

                                                                                                                    ___________

INVESTMENT INCOME--NET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                            3,756,710

NET REALIZED GAIN (LOSS) ON INVESTMENTS--Note 1(b) . . . . . . . . . . . . . . . . . . . .                               (4,554)

                                                                                                                    ___________

NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS . . . . . . . . . . . . . . . . . . .                           $3,752,156

                                                                                                                    ___________


                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>
DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
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STATEMENT OF CHANGES IN NET ASSETS

                                                                                        Year Ended            Year Ended

                                                                                   September 30, 1998     September 30, 1997

                                                                                    __________________      ________________


OPERATIONS:
<S>                                                                                    <C>                    <C>
  Investment income--net . . . . . . . . . . . . . . . . . . . . . . . . . . . .       $    3,756,710         $    4,103,592

  Net realized gain (loss) on investments  . . . . . . . . . . . . . . . . . . .               (4,554)                (2,544)

                                                                                        _____________          _____________

    Net Increase (Decrease) in Net Assets Resulting from Operations  . . . . . .            3,752,156              4,101,048

                                                                                      _____________          _____________

DIVIDENDS TO SHAREHOLDERS FROM:

  Investment income--net . . . . . . . . . . . . . . . . . . . . . . . . . . . .           (3,756,710)            (4,103,592)

                                                                                        _____________          _____________

BENEFICIAL INTEREST TRANSACTIONS ($1.00 per share):

  Net proceeds from shares sold  . . . . . . . . . . . . . . . . . . . . . . . .          266,067,237            289,225,274

  Dividends reinvested . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            3,563,779              3,919,938

  Cost of shares redeemed  . . . . . . . . . . . . . . . . . . . . . . . . . . .         (273,879,544)          (314,009,714)

                                                                                        _____________          _____________

    Increase (Decrease) in Net Assets from Beneficial Interest Transactions  . .           (4,248,528)           (20,864,502)

                                                                                        _____________          _____________

       Total Increase (Decrease) in Net Assets . . . . . . . . . . . . . . . . .           (4,253,082)           (20,867,046)

NET ASSETS:

  Beginning of Period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          131,050,996            151,918,042

                                                                                        _____________          _____________

  End of Period  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         $126,797,914           $131,050,996

                                                                                        _____________          _____________


                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
<TABLE>
DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

FINANCIAL HIGHLIGHTS

  Contained  below  is  per  share  operating  performance  data  for a share of
Beneficial  Interest outstanding, total investment return, ratios to average net
assets  and  other supplemental data for each period indicated. This information
has been derived from the Fund's financial statements.



                                                                                    Year Ended September 30,

                                                                     ______________________________________________________

PER SHARE DATA:                                                      1998         1997        1996           1995         1994
                                                                    ______       ______       ______        ______       ______
<S>                                                                <C>          <C>          <C>           <C>          <C>
   Net asset value, beginning of period  . . . . . . . . . .       $  1.00      $  1.00      $  1.00       $  1.00      $  1.00

                                                                    ______       ______       ______        ______       ______

   Investment Operations:

   Investment income--net  . . . . . . . . . . . . . . . . .          .030         .030         .030          .034         .025

                                                                    ______       ______       ______        ______       ______

   Distributions:

   Dividends from investment income--net . . . . . . . . . .         (.030)       (.030)       (.030)        (.034)       (.025)

                                                                    ______       ______       ______        ______       ______

   Net asset value, end of period  . . . . . . . . . . . . .       $  1.00      $  1.00      $  1.00       $  1.00      $  1.00

                                                                    ______       ______       ______        ______       ______


TOTAL INVESTMENT RETURN. . . . . . . . . . . . . . . . . . .          3.05%        3.03%        3.04%         3.50%        2.54%

RATIOS/SUPPLEMENTAL DATA:

   Ratio of expenses to average net assets . . . . . . . . .           .65%         .66%         .68%          .42%         .20%

   Ratio of net investment income

       to average net assets . . . . . . . . . . . . . . . .          3.01%        2.99%        3.00%         3.45%        2.51%

   Decrease reflected in above expense ratios

       due to undertakings by the Manager  . . . . . . . . .            --           --          .01%          .27%         .47%

   Net Assets, end of period (000's Omitted) . . . . . . . .      $126,798     $131,051     $151,918      $142,731     $140,723

                      SEE NOTES TO FINANCIAL STATEMENTS.
</TABLE>
DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS

NOTE 1--SIGNIFICANT ACCOUNTING POLICIES:

  Dreyfus  Pennsylvania  Municipal  Money Market Fund (the "Fund") is registered
under the Investment Company Act of  1940,  as  amended  (the  "Act" ) as  a
non-diversified open-end management investment company. The Fund's investment
objective is to provide investors with as  high  a  level of current income
exempt from Federal and Pennsylvania income taxes  as  is consistent with the
preservation of capital and the maintenance of liquidity.  The  Dreyfus
Corporation  (the  "Manager" ) serves  as  the  Fund's investment  adviser.  The
Manager  is  a direct subsidiary of Mellon Bank, N.A.  Premier  Mutual  Fund
Services,  Inc.  is the distributor of the Fund's shares, which are sold to the
public without a sales charge.

  It  is the Fund's policy to maintain a continuous net asset value per share of
$1.00; the Fund has adopted certain investment, portfolio valuation and dividend
and distribution policies to enable it to do so. There is no assurance, however,
that  the  Fund  will  be able to maintain a stable net asset value per share of
$1.00.

  The  Fund' s  financial  statements  are prepared in accordance with generally
accepted accounting principles which may require the use of management estimates
and assumptions. Actual results could differ from those estimates.

  (A)  PORTFOLIO  VALUATION:  Investments  in securities are valued at amortized
cost, which has been determined by the Fund's Board of Trustees to represent the
fair value of the Fund's investments.

(B) SECURITIES TRANSACTIONS AND INVESTMENT INCOME: Securities transactions are
recorded  on  a  trade date basis. Interest income, adjusted for amortization of
premiums  and original issue discounts on investments, is earned from settlement
date and recognized on the accrual basis. Realized gain and loss from securities
transactions  are  recorded  on  the  identified cost basis. Cost of investments
represents  amortized  cost.  Under the terms of the custody agreement, the Fund
received  net  earnings  credits  of  $6,954 during the year ended September 30,
1998, based on available cash balances left on deposit. Income earned under this
arrangement is included in interest income.

  The  Fund  follows  an  investment  policy of investing primarily in municipal
obligations  of  one  state. Economic changes affecting the state and certain of
its  public  bodies  and municipalities may affect the ability of issuers within
the  state to pay interest on, or repay principal of, municipal obligations held
by the Fund.

  (C)  DIVIDENDS  TO  SHAREHOLDERS:  It  is  the  policy  of the Fund to declare
dividends  daily  from  investment  income-net. Such dividends are paid monthly.
Dividends from net realized capital gain, if any, are normally declared and paid
annually, but the Fund may make distributions on a more frequent basis to comply
with  the  distribution  requirements  of  the Internal Revenue Code of 1986, as
amended (the "Code"). To the extent that net realized capital gain can be offset
by  capital loss carryovers, it is the policy of the Fund not to distribute such
gain.

  (D)  FEDERAL INCOME TAXES: It is the policy of the Fund to continue to qualify
as a regulated investment company, which can distribute tax exempt dividends, by
complying  with the applicable provisions of the Code, and to make distributions
of  income  and  net  realized  capital  gain  sufficient  to  relieve  it  from
substantially all Federal income and excise taxes.

  The  Fund  has  an  unused  capital  loss  carryover  of approximately $24,000
available  for  Federal  income  tax  purposes  to be applied against future net
securities  profits,  if  any,  realized  subsequent  to September 30, 1998. The
carryover  does not include net realized securities losses from November 1, 1997
through  September  30, 1998 which are treated, for Federal income tax purposes,
as  arising  in  fiscal  1999.  If not applied, $100 of the carryover expires in
fiscal  2000,  $3,600 expires in fiscal 2003, $17,800 expires in fiscal 2004 and
$2,500 expires in fiscal 2006.

At September 30, 1998, the cost of investments for Federal income tax purposes
was substantially the same as the cost for financial reporting purposes (see the
Statement of Investments).

DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

NOTES TO FINANCIAL STATEMENTS (CONTINUED)

NOTE 2--MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES:

(A) Pursuant to a management agreement with the Manager, the management fee is
computed at the annual rate of . 50  of  1%  of the value of the Fund's average
daily net assets and is payable monthly.

  (B)  Under  the Shareholder Services Plan, the Fund reimburses Dreyfus Service
Corporation,  a  wholly-owned subsidiary of the Manager, an amount not to exceed
an  annual rate of .25 of 1% of the value of the Fund's average daily net assets
for certain allocated expenses of providing personal services and/or maintaining
shareholder  accounts.  The  services  provided  may  include  personal services
relating  to  shareholder  accounts,  such  as  answering  shareholder inquiries
regarding  the  Fund  and  providing reports and other information, and services
related  to  the  maintenance  of  shareholder accounts. During the period ended
September  30,  1998,  the  Fund  was charged $9,251 pursuant to the Shareholder
Services Plan.

  The  Fund compensates Dreyfus Transfer, Inc., a wholly-owned subsidiary of the
Manager,   under  a  transfer  agency  agreement  for  providing  personnel  and
facilities  to  perform transfer agency services for the Fund. During the period
ended  September 30, 1998, the Fund was charged $47,366 pursuant to the transfer
agency agreement.

  (C)  Each  trustee  who  is  not  an "affiliated person" as defined in the Act
receives  from  the  Fund  an  annual  fee  of $1,000. The Chairman of the Board
receives an additional 25% of such compensation.


DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

SHAREHOLDERS AND BOARD OF TRUSTEES

DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND

  We  have  audited  the  accompanying  statement  of  assets and liabilities of
Dreyfus  Pennsylvania  Municipal  Money  Market Fund, including the statement of
investments,  as  of September 30, 1998, and the related statement of operations
for  the year then ended, the statement of changes in net assets for each of the
two  years  in  the  period then ended, and financial highlights for each of the
years indicated therein. These financial statements and financial highlights are
the responsibility of the Fund's management. Our responsibility is to express an
opinion  on  these  financial  statements  and financial highlights based on our
audits.

  We  conducted  our  audits  in  accordance  with  generally  accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable  assurance  about  whether  the  financial  statements  and financial
highlights  are free of material misstatement. An audit includes examining, on a
test  basis,  evidence  supporting  the amounts and disclosures in the financial
statements  and  financial  highlights.  Our procedures included confirmation of
securities  owned as of September 30, 1998 by correspondence with the custodian.
An  audit also includes assessing the accounting principles used and significant
estimates  made  by  management,  as  well  as  evaluating the overall financial
statement  presentation.  We  believe that our audits provide a reasonable basis
for our opinion.

  In  our opinion, the financial statements and financial highlights referred to
above  present  fairly,  in  all  material  respects,  the financial position of
Dreyfus  Pennsylvania  Municipal  Money  Market  Fund at September 30, 1998, the
results of its operations for the year then ended, the changes in its net assets
for each of the two years in the period then ended, and the financial highlights
for  each  of  the  indicated  years,  in  conformity  with  generally  accepted
accounting principles.





New York, New York

October 30, 1998


DREYFUS PENNSYLVANIA MUNICIPAL MONEY MARKET FUND
- -----------------------------------------------------------------------------

IMPORTANT TAX INFORMATION (UNAUDITED)

  In  accordance  with  Federal  tax  law,  the  Fund  hereby designates all the
dividends paid from investment income-net during the fiscal year ended September
30, 1998 as "exempt-interest dividends" (not subject to regular Federal and, for
individuals who are Pennsylvania residents, Pennsylvania personal income taxes)


Dreyfus lion "d" logo                                   (reg.tm)

Dreyfus logo                                   (reg.tm)


DREYFUS PENNSYLVANIA MUNICIPAL

MONEY MARKET FUND

200 Park Avenue

New York, NY 10166

MANAGER

The Dreyfus Corporation

200 Park Avenue

New York, NY 10166

CUSTODIAN

The Bank of New York

90 Washington Street

New York, NY 10286

TRANSFER AGENT &

DIVIDEND DISBURSING AGENT

Dreyfus Transfer, Inc.

P.O. Box 9671

Providence, RI 02940










Printed in U.S.A.                                              104AR989

Pennsylvania

Municipal Money

Market Fund

Annual Report

September 30, 1998



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