<PAGE> PAGE 1
000 B000000 07/31/97
000 C000000 0000837441
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 OPPENHEIMER CALIFORNIA MUNICIPAL FUND
001 B000000 811-5586
001 C000000 2123230200
002 A000000 TWO WORLD TRADE CENTER
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10048
002 D020000 0203
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
020 A000001 SMITH BARNEY, HARRIS UPHAM & CO., INC.
020 B000001 13-3371860
020 C000001 18
020 A000002 MERRIL LYNCH, PIERCE, FENNER, & SMITH, INC
020 B000002 13-5674085
020 C000002 12
020 A000003 FIRST BOSTON CORP. (THE)
020 B000003 13-5659485
020 C000003 6
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 36
022 A000001 SMITH BARNEY, HARRIS UPHAM & CO., INC.
022 B000001 13-3371860
022 C000001 33734
022 D000001 19453
022 A000002 MERRILL LYNCH, PIERCE, FENNER, & SMITH, INC.
022 B000002 13-5674085
022 C000002 11745
022 D000002 21256
022 A000003 PAINEWEBBER, INC.
022 B000003 13-2638166
022 C000003 15681
<PAGE> PAGE 2
022 D000003 16917
022 A000004 MORGAN GUARANTY TRUST CO.
022 B000004 13-5123346
022 C000004 17600
022 D000004 9900
022 A000005 GOLDMAN, SACHS & CO.
022 B000005 13-5108880
022 C000005 11400
022 D000005 6400
022 A000006 PIPER, JAFFRAY, & HOPWOOD, INC.
022 B000006 41-0953246
022 C000006 9007
022 D000006 6221
022 A000007 SIMON(WM.E.) & SONS MUNICIPAL SECURITIES,INC.
022 B000007 22-3017217
022 C000007 10890
022 D000007 4032
022 A000008 LEHMAN BROTHERS, INC.
022 B000008 13-2518466
022 C000008 236
022 D000008 13879
022 A000009 MORGAN STANLEY & CO., INC.
022 B000009 13-2655998
022 C000009 12447
022 D000009 0
022 A000010 PRUDENTIAL SECURITIES, INC.
022 B000010 22-2347336
022 C000010 3000
022 D000010 8781
023 C000000 166525
023 D000000 154251
028 A010000 5093
028 A020000 907
028 A030000 0
028 A040000 3195
028 B010000 5565
028 B020000 912
028 B030000 0
028 B040000 4732
028 C010000 7406
028 C020000 917
028 C030000 0
028 C040000 5399
028 D010000 5739
028 D020000 925
028 D030000 0
028 D040000 6517
028 E010000 7584
028 E020000 924
028 E030000 0
028 E040000 4990
<PAGE> PAGE 3
028 F010000 7750
028 F020000 930
028 F030000 0
028 F040000 4788
028 G010000 39137
028 G020000 5515
028 G030000 0
028 G040000 29621
028 H000000 15140
029 000000 Y
030 A000000 951
030 B000000 4.75
030 C000000 0.00
031 A000000 160
031 B000000 0
032 000000 791
033 000000 0
034 000000 Y
035 000000 159
036 A000000 N
036 B000000 0
037 000000 N
038 000000 0
039 000000 N
040 000000 Y
041 000000 Y
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 100
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 1398
044 000000 0
054 A000000 Y
054 B000000 Y
054 C000000 Y
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 Y
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 Y
054 M000000 Y
054 N000000 N
054 O000000 Y
<PAGE> PAGE 4
055 A000000 Y
055 B000000 N
056 000000 N
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 N
060 B000000 N
061 000000 25
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.1
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 98.3
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 22.2
064 A000000 Y
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 Y
070 E020000 Y
070 F010000 N
070 F020000 N
070 G010000 Y
070 G020000 Y
070 H010000 N
<PAGE> PAGE 5
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 Y
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 140865
071 B000000 110605
071 C000000 354568
071 D000000 31
072 A000000 12
072 B000000 23015
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 2040
072 G000000 0
072 H000000 0
072 I000000 179
072 J000000 21
072 K000000 33
072 L000000 74
072 M000000 71
072 N000000 8
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 21
072 S000000 21
072 T000000 1398
072 U000000 0
072 V000000 0
072 W000000 24
072 X000000 3890
072 Y000000 0
072 Z000000 19125
<PAGE> PAGE 6
072AA000000 5983
072BB000000 2575
072CC010000 15361
072CC020000 0
072DD010000 15608
072DD020000 3005
072EE000000 0
073 A010000 0.5686
073 A020000 0.4882
073 B000000 0.0000
073 C000000 0.0000
074 A000000 799
074 B000000 0
074 C000000 273
074 D000000 379971
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 7543
074 M000000 11
074 N000000 388597
074 O000000 0
074 P000000 148
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 1844
074 S000000 0
074 T000000 386605
074 U010000 27257
074 U020000 7537
074 V010000 10.94
074 V020000 10.94
074 W000000 0.0000
074 X000000 7578
074 Y000000 15801
075 A000000 0
075 B000000 358500
076 000000 0.00
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
<PAGE> PAGE 7
077 H000000 N
077 I000000 N
077 J000000 Y
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 Y
077 Q020000 N
077 Q030000 N
078 000000 N
080 A000000 ICI MUTUAL INSURANCE CO.
080 C000000 78000
081 A000000 Y
081 B000000 93
082 A000000 N
082 B000000 0
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
SIGNATURE GEORGE C. BOWEN
TITLE TREASURER
<PAGE>
During the year ended July 31, 1997, the Fund adjusted the classification of
distributions to shareholders to reflect the differences between financial
statement amounts and distributions determined in accordance with income tax
regulations. Accordingly, during the period ended July 31, 1997, amounts have
been reclassified to reflect a decrease in undistributed net investment income
of $235,964, an increase in accumulated net realized gain on investments of
$169,415, and an increase in paid in capital of $66,549.
<PAGE>
THE BOARD OF TRUSTEES AND SHAREHOLDERS OF
OPPENHEIMER CALIFORNIA MUNICIPAL FUND:
In planning and performing our audit of the financial statements of Oppenheimer
California Municipal Fund (formerly Oppenheimer California Tax-Exempt Fund) for
the year ended July 31, 1997, we considered its internal control structure,
including procedures for safeguarding securities, in order to determine our
auditing procedures for the purpose of expressing our opinion on the financial
statements and to comply with the requirements of Form N-SAR, not to provide
assurance on the internal control structure.
The management of Oppenheimer California Municipal Fund is responsible for
establishing and maintaining an internal control structure. In fulfilling this
responsibility, estimates and judgments by management are required to assess the
expected benefits and related costs of internal control structure policies and
procedures. Two of the objectives of an internal control structure are to
provide management with reasonable, but not absolute, assurance that assets are
safeguarded against loss from unauthorized use or disposition and that
transactions are executed in accordance with management's authorization and
recorded properly to permit preparation of financial statements in conformity
with generally accepted accounting principles.
Because of inherent limitations in any internal control structure, errors or
irregularities may occur and may not be detected. Also, projection of any
evaluation of the structure to future periods is subject to the risk that it may
become inadequate because of changes in conditions or that the effectiveness of
the design and operation may deteriorate.
Our 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. A material weakness is a condition in which the design or
operation of the specific internal control structure elements does not reduce to
a relatively low level the risk that errors or irregularities in amounts that
would be material in relation to the financial statements being audited may
occur and not be detected within a timely period by employees in the normal
course of performing their assigned functions. However, we noted no matters
involving the internal control structure, including procedures for safeguarding
securities, that we considered to be material weaknesses as defined above as of
July 31, 1997.
This report is intended solely for the information and use of management and the
Securities and Exchange Commission and should not be used for any other purpose.
KPMG PEAT MARWICK LLP
Denver, Colorado
August 21, 1997
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 837441
<NAME> OPPENHEIMER CALIFORNIA MUNICIPAL FUND-A
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JUL-31-1997
<PERIOD-START> AUG-01-1996
<PERIOD-END> JUL-31-1997
<INVESTMENTS-AT-COST> 357,987,840
<INVESTMENTS-AT-VALUE> 380,243,900
<RECEIVABLES> 7,543,240
<ASSETS-OTHER> 10,474
<OTHER-ITEMS-ASSETS> 798,911
<TOTAL-ASSETS> 388,596,525
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,991,893
<TOTAL-LIABILITIES> 1,991,893
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 360,580,782
<SHARES-COMMON-STOCK> 27,257,122
<SHARES-COMMON-PRIOR> 27,539,996
<ACCUMULATED-NII-CURRENT> 966,465
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2,801,325
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 22,256,060
<NET-ASSETS> 298,162,064
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 23,014,569
<OTHER-INCOME> 0
<EXPENSES-NET> 3,889,439
<NET-INVESTMENT-INCOME> 19,125,130
<REALIZED-GAINS-CURRENT> 3,408,420
<APPREC-INCREASE-CURRENT> 15,361,034
<NET-CHANGE-FROM-OPS> 37,894,584
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 15,608,071
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,743,446
<NUMBER-OF-SHARES-REDEEMED> 4,874,267
<SHARES-REINVESTED> 847,947
<NET-CHANGE-IN-ASSETS> 46,362,956
<ACCUMULATED-NII-PRIOR> 868,145
<ACCUMULATED-GAINS-PRIOR> (776,510)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,039,568
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3,889,439
<AVERAGE-NET-ASSETS> 289,439,000
<PER-SHARE-NAV-BEGIN> 10.39
<PER-SHARE-NII> 0.58
<PER-SHARE-GAIN-APPREC> 0.54
<PER-SHARE-DIVIDEND> 0.57
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.94
<EXPENSE-RATIO> 0.94
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 837441
<NAME> OPPENHEIMER CALIFORNIA MUNICIPAL FUND-B
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JUL-31-1997
<PERIOD-START> AUG-01-1996
<PERIOD-END> JUL-31-1997
<INVESTMENTS-AT-COST> 357,987,840
<INVESTMENTS-AT-VALUE> 380,243,900
<RECEIVABLES> 7,543,240
<ASSETS-OTHER> 10,474
<OTHER-ITEMS-ASSETS> 798,911
<TOTAL-ASSETS> 388,596,525
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,991,893
<TOTAL-LIABILITIES> 1,991,893
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 360,580,782
<SHARES-COMMON-STOCK> 7,536,586
<SHARES-COMMON-PRIOR> 5,008,911
<ACCUMULATED-NII-CURRENT> 966,465
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2,801,325
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 22,256,060
<NET-ASSETS> 82,473,941
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 23,014,569
<OTHER-INCOME> 0
<EXPENSES-NET> 3,889,439
<NET-INVESTMENT-INCOME> 19,125,130
<REALIZED-GAINS-CURRENT> 3,408,420
<APPREC-INCREASE-CURRENT> 15,361,034
<NET-CHANGE-FROM-OPS> 37,894,584
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 3,005,232
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,027,347
<NUMBER-OF-SHARES-REDEEMED> 667,227
<SHARES-REINVESTED> 167,555
<NET-CHANGE-IN-ASSETS> 46,362,956
<ACCUMULATED-NII-PRIOR> 868,145
<ACCUMULATED-GAINS-PRIOR> (776,510)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,039,568
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3,889,439
<AVERAGE-NET-ASSETS> 65,192,000
<PER-SHARE-NAV-BEGIN> 10.39
<PER-SHARE-NII> 0.49
<PER-SHARE-GAIN-APPREC> 0.55
<PER-SHARE-DIVIDEND> 0.49
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.94
<EXPENSE-RATIO> 1.70
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 837441
<NAME> OPPENHEIMER CALIFORNIA MUNICIPAL FUND-C
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JUL-31-1997
<PERIOD-START> AUG-01-1996
<PERIOD-END> JUL-31-1997
<INVESTMENTS-AT-COST> 357,987,840
<INVESTMENTS-AT-VALUE> 380,243,900
<RECEIVABLES> 7,543,240
<ASSETS-OTHER> 10,474
<OTHER-ITEMS-ASSETS> 798,911
<TOTAL-ASSETS> 388,596,525
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,991,893
<TOTAL-LIABILITIES> 1,991,893
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 360,580,782
<SHARES-COMMON-STOCK> 546,266
<SHARES-COMMON-PRIOR> 209,190
<ACCUMULATED-NII-CURRENT> 966,465
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2,801,325
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 22,256,060
<NET-ASSETS> 5,968,627
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 23,014,569
<OTHER-INCOME> 0
<EXPENSES-NET> 3,889,439
<NET-INVESTMENT-INCOME> 19,125,130
<REALIZED-GAINS-CURRENT> 3,408,420
<APPREC-INCREASE-CURRENT> 15,361,034
<NET-CHANGE-FROM-OPS> 37,894,584
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 177,543
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 477,845
<NUMBER-OF-SHARES-REDEEMED> 151,952
<SHARES-REINVESTED> 11,183
<NET-CHANGE-IN-ASSETS> 46,362,956
<ACCUMULATED-NII-PRIOR> 868,145
<ACCUMULATED-GAINS-PRIOR> (776,510)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,039,568
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3,889,439
<AVERAGE-NET-ASSETS> 3,869,000
<PER-SHARE-NAV-BEGIN> 10.38
<PER-SHARE-NII> 0.49
<PER-SHARE-GAIN-APPREC> 0.55
<PER-SHARE-DIVIDEND> 0.49
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.93
<EXPENSE-RATIO> 1.70
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>