<PAGE> PAGE 1
000 B000000 08/31/96
000 C000000 0000823483
000 D000000 Y
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 OPPENHEIMER MAIN STREET FUNDS, INC.
001 B000000 811-5360
001 C000000 3037432869
002 A000000 3410 SOUTH GALENA STREET
002 B000000 DENVER
002 C000000 C
002 D010000 80231
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 2
007 C010100 1
007 C010200 2
007 C020200 OPPENHEIMER MAIN STREET INCOME & GROWTH FUND
007 C030200 N
007 C010300 3
007 C010400 4
007 C010500 5
007 C020500 OPPENHEIMER MAIN STREET MUNICIPAL FUND
007 C030500 N
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
011 A00AA01 OPPENHEIMERFUNDS DISTRIBUTOR, INC.
011 B00AA01 8-22992
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10048
011 C04AA01 0203
012 A00AA01 OPPENHEIMERFUNDS SERVICES
012 B00AA01 84-1562
012 C01AA01 DENVER
012 C02AA01 CO
012 C03AA01 80217
020 A000001 MORGAN GUARANTY TRUST CO.
020 B000001 13-5123346
020 C000001 1276
020 A000002 GOLDMAN, SACHS & CO.
<PAGE> PAGE 2
020 B000002 13-5108880
020 C000002 880
020 A000003 FIRST CHICAGO CAPITAL MARKET
020 B000003 36-3595942
020 C000003 489
020 A000004 CANADIAN IMPERIAL BANK OF COMMERCE
020 B000004 FOREIGN
020 C000004 401
020 A000005 MORGAN STANLEY & CO., INC.
020 B000005 13-2655998
020 C000005 290
020 A000006 FIRST BOSTON CORP. (THE)
020 B000006 13-5659485
020 C000006 284
020 A000007 ZION FIRST NATIONAL BANK
020 B000007 87-0189025
020 C000007 218
020 A000008 MERRILL LYNCH, PIERCE, FENNER & SMITH, INC.
020 B000008 13-5674085
020 C000008 171
020 A000009 LEHMAN BROTHERS, INC.
020 B000009 13-2518466
020 C000009 163
020 A000010 ROYAL ALLIANCE ASSOCIATES, INC.
020 B000010 93-987232
020 C000010 149
021 000000 6426
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
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 A00AA00 ICI MUTUAL INSURANCE CO.
080 C00AA00 70000
081 A00AA00 Y
081 B00AA00 86
<PAGE> PAGE 3
082 A00AA00 N
082 B00AA00 0
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
085 B00AA00 N
028 A010200 227290
028 A020200 0
028 A030200 0
028 A040200 99647
028 B010200 234912
028 B020200 0
028 B030200 0
028 B040200 66533
028 C010200 0
028 C020200 0
028 C030200 0
028 C040200 0
028 D010200 0
028 D020200 0
028 D030200 0
028 D040200 0
028 E010200 0
028 E020200 0
028 E030200 0
028 E040200 0
028 F010200 0
028 F020200 0
028 F030200 0
028 F040200 0
028 G010200 462202
028 G020200 0
028 G030200 0
028 G040200 166180
028 H000200 163868
029 000200 Y
030 A000200 5372
030 B000200 5.75
030 C000200 0.00
031 A000200 1444
031 B000200 0
032 000200 3928
033 000200 0
034 000200 Y
035 000200 635
036 A000200 N
036 B000200 0
042 A000200 0
042 B000200 0
<PAGE> PAGE 4
042 C000200 0
042 D000200 100
042 E000200 0
042 F000200 0
042 G000200 0
042 H000200 0
043 000200 5592
044 000200 0
062 A000200 N
062 B000200 0.0
062 C000200 0.0
062 D000200 0.0
062 E000200 0.0
062 F000200 0.0
062 G000200 0.0
062 H000200 0.0
062 I000200 0.0
062 J000200 0.0
062 K000200 0.0
062 L000200 0.0
062 M000200 0.0
062 N000200 0.0
062 O000200 0.0
062 P000200 0.0
062 Q000200 0.0
062 R000200 0.0
071 A000200 815165
071 B000200 1001434
071 C000200 4661849
071 D000200 18
072 A000200 2
072 B000200 13335
072 C000200 11057
072 D000200 0
072 E000200 0
072 F000200 4428
072 G000200 0
072 H000200 0
072 I000200 1783
072 J000200 51
072 K000200 315
072 L000200 108
072 M000200 10
072 N000200 265
072 O000200 0
072 P000200 0
072 Q000200 0
072 R000200 8
072 S000200 6
072 T000200 5592
072 U000200 0
<PAGE> PAGE 5
072 V000200 0
072 W000200 88
072 X000200 12654
072 Y000200 0
072 Z000200 11737
072AA000200 104174
072BB000200 65536
072CC010200 0
072CC020200 240283
072DD010200 0
072DD020200 0
072EE000200 0
073 A010200 0.0000
073 A020200 0.0000
073 B000200 0.0000
073 C000200 0.0000
074 A000200 432
074 B000200 70900
074 C000200 1183882
074 D000200 226464
074 E000200 63210
074 F000200 4085038
074 G000200 0
074 H000200 0
074 I000200 151603
074 J000200 13016
074 K000200 0
074 L000200 38290
074 M000200 43
074 N000200 5832878
074 O000200 24118
074 P000200 190
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 13202
074 S000200 0
074 T000200 5795368
074 U010200 112444
074 U020200 68668
074 V010200 27.95
074 V020200 27.79
074 W000200 0.0000
074 X000200 506495
074 Y000200 0
075 A000200 0
075 B000200 5638000
076 000200 0.00
028 A010500 693
028 A020500 257
<PAGE> PAGE 6
028 A030500 0
028 A040500 639
028 B010500 664
028 B020500 257
028 B030500 0
028 B040500 870
028 C010500 0
028 C020500 0
028 C030500 0
028 C040500 0
028 D010500 0
028 D020500 0
028 D030500 0
028 D040500 0
028 E010500 0
028 E020500 0
028 E030500 0
028 E040500 0
028 F010500 0
028 F020500 0
028 F030500 0
028 F040500 0
028 G010500 1358
028 G020500 514
028 G030500 0
028 G040500 1510
028 H000500 804
029 000500 Y
030 A000500 25
030 B000500 4.75
030 C000500 0.00
031 A000500 4
031 B000500 0
032 000500 21
033 000500 0
034 000500 Y
035 000500 3
036 A000500 N
036 B000500 0
042 A000500 0
042 B000500 0
042 C000500 0
042 D000500 100
042 E000500 0
042 F000500 0
042 G000500 0
042 H000500 0
043 000500 10
044 000500 0
055 A000500 Y
055 B000500 N
<PAGE> PAGE 7
056 000500 N
057 000500 N
062 A000500 Y
062 B000500 0.0
062 C000500 0.0
062 D000500 0.0
062 E000500 0.0
062 F000500 0.0
062 G000500 0.0
062 H000500 0.0
062 I000500 0.0
062 J000500 0.0
062 K000500 0.0
062 L000500 0.0
062 M000500 0.0
062 N000500 0.0
062 O000500 99.1
062 P000500 0.0
062 Q000500 0.0
062 R000500 0.0
063 A000500 0
063 B000500 20.5
064 A000500 Y
064 B000500 N
070 A010500 Y
070 A020500 N
070 B010500 N
070 B020500 N
070 C010500 Y
070 C020500 N
070 D010500 N
070 D020500 N
070 E010500 Y
070 E020500 N
070 F010500 N
070 F020500 N
070 G010500 Y
070 G020500 N
070 H010500 N
070 H020500 N
070 I010500 N
070 I020500 N
070 J010500 Y
070 J020500 N
070 K010500 Y
070 K020500 N
070 L010500 N
070 L020500 N
070 M010500 N
070 M020500 N
070 N010500 Y
<PAGE> PAGE 8
070 N020500 N
070 O010500 Y
070 O020500 N
070 P010500 Y
070 P020500 Y
070 Q010500 N
070 Q020500 N
070 R010500 N
070 R020500 N
071 A000500 2273
071 B000500 1109
071 C000500 81715
071 D000500 1
072 A000500 2
072 B000500 927
072 C000500 0
072 D000500 0
072 E000500 0
072 F000500 56
072 G000500 0
072 H000500 0
072 I000500 9
072 J000500 4
072 K000500 2
072 L000500 5
072 M000500 0
072 N000500 2
072 O000500 0
072 P000500 0
072 Q000500 0
072 R000500 0
072 S000500 2
072 T000500 10
072 U000500 0
072 V000500 0
072 W000500 1
072 X000500 91
072 Y000500 3
072 Z000500 839
072AA000500 11
072BB000500 54
072CC010500 53
072CC020500 0
072DD010500 774
072DD020500 47
072EE000500 0
073 A010500 0.1222
073 A020500 0.1002
073 B000500 0.0000
073 C000500 0.0000
074 A000500 0
<PAGE> PAGE 9
074 B000500 0
074 C000500 0
074 D000500 82015
074 E000500 0
074 F000500 0
074 G000500 0
074 H000500 0
074 I000500 0
074 J000500 0
074 K000500 0
074 L000500 1121
074 M000500 5
074 N000500 83141
074 O000500 0
074 P000500 2
074 Q000500 0
074 R010500 0
074 R020500 0
074 R030500 0
074 R040500 394
074 S000500 0
074 T000500 82745
074 U010500 6318
074 U020500 488
074 V010500 12.16
074 V020500 12.14
074 W000500 0.0000
074 X000500 2245
074 Y000500 0
075 A000500 0
075 B000500 83351
076 000500 0.00
SIGNATURE GEORGE C. BOWEN
TITLE TREASURER
<PAGE>
DELOITTE & TOUCHE LLP/LOGO/
Suite 3600
555 Seventeenth Street
Denver, Colorado 80202-3942
Telephone: (303)292-5400
Facsimile: (303)312-4000
To the Board of Directors of
Oppenheimer Main Street Income & Growth Fund:
In planning and performing our audit of the financial statements of Oppenheimer
Main Street Income & Growth Fund (Fund) for the two months ended August 31, 1996
(on which we have issued our report dated September 23, 1996), 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 the 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 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 consider to be material weaknesses as defined above as of
August 31, 1996.
This report is intended solely for the information and use of management, the
Board of Directors and the Securities and Exchange Commission.
Yours truly,
/S/DELOITTE & TOUCHE LLP
September 23, 1996
- ---------------
DELOITTE TOUCHE
TOHMATSU
INTERNATIONAL
- ---------------
<PAGE>
DELOITTE & TOUCHE LLP/LOGO/
Suite 3600
555 Seventeenth Street
Denver, Colorado 80202-3942
Telephone: (303)292-5400
Facsimile: (303)312-4000
To the Board of Directors of
Oppenheimer Main Street California Municipal Fund:
In planning and performing our audit of the financial statements of Oppenheimer
Main Street California Municipal Fund (Fund) for the two months ended August 31,
1996 (on which we have issued our report dated September 23, 1996), 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 the 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 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 consider to be material weaknesses as defined above as of
August 31, 1996.
This report is intended solely for the information and use of management, the
Board of Directors and the Securities and Exchange Commission.
Yours truly,
/S/DELOITTE & TOUCHE LLP
September 23, 1996
- ---------------
DELOITTE TOUCHE
TOHMATSU
INTERNATIONAL
- ---------------
<PAGE>
During the two months ended August 31, 1996, the Fund adjusted the classifica-
tion of distributions to shareholders to reflect the differences between
financial statement amounts and distributions determined in accordance with
income tax regulations. Accordingly, during the two months ended August 31,
1996, amounts have been reclassified to reflect a decrease in paid-in capital of
$743,288, a decrease in overdistributed net investment income of $713,737, a
decrease in accumulated net realized loss on investments of $29,551.
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 823483
<NAME> OPPENHEIMER MAIN STREET INCOME & GROWTH -A
<SERIES>
<NUMBER> 2
<NAME> OPPENHEIMER MAIN STREET FUNDS, INC.
<S> <C>
<PERIOD-TYPE> 2-MOS
<FISCAL-YEAR-END> AUG-31-1996
<PERIOD-START> JUL-01-1996
<PERIOD-END> AUG-31-1996
<INVESTMENTS-AT-COST> 5,367,879,904
<INVESTMENTS-AT-VALUE> 5,781,097,220
<RECEIVABLES> 51,305,771
<ASSETS-OTHER> 43,163
<OTHER-ITEMS-ASSETS> 432,123
<TOTAL-ASSETS> 5,832,878,277
<PAYABLE-FOR-SECURITIES> 24,118,260
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 13,391,545
<TOTAL-LIABILITIES> 37,509,805
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,966,557,252
<SHARES-COMMON-STOCK> 112,443,525
<SHARES-COMMON-PRIOR> 108,930,060
<ACCUMULATED-NII-CURRENT> 13,109,817
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 403,248,149
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 412,453,254
<NET-ASSETS> 3,142,824,663
<DIVIDEND-INCOME> 11,056,742
<INTEREST-INCOME> 13,334,612
<OTHER-INCOME> 0
<EXPENSES-NET> 12,654,108
<NET-INVESTMENT-INCOME> 11,737,246
<REALIZED-GAINS-CURRENT> 38,637,876
<APPREC-INCREASE-CURRENT> (240,283,299)
<NET-CHANGE-FROM-OPS> (189,908,177)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,371,957
<NUMBER-OF-SHARES-REDEEMED> 3,858,492
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 106,113,777
<ACCUMULATED-NII-PRIOR> 1,372,571
<ACCUMULATED-GAINS-PRIOR> 364,610,273
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,428,137
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 12,654,108
<AVERAGE-NET-ASSETS> 3,089,833,195
<PER-SHARE-NAV-BEGIN> 28.89
<PER-SHARE-NII> 0.07
<PER-SHARE-GAIN-APPREC> (1.01)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 27.95
<EXPENSE-RATIO> 0.98
<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> 823483
<NAME> OPPENHEIMER MAIN STREET INCOME & GROWTH-B
<SERIES>
<NUMBER> 2
<NAME> OPPENHEIMER MAIN STREET FUNDS, INC.
<S> <C>
<PERIOD-TYPE> 2-MOS
<FISCAL-YEAR-END> AUG-31-1996
<PERIOD-START> JUL-01-1996
<PERIOD-END> AUG-31-1996
<INVESTMENTS-AT-COST> 5,367,879,904
<INVESTMENTS-AT-VALUE> 5,781,097,220
<RECEIVABLES> 51,305,771
<ASSETS-OTHER> 43,163
<OTHER-ITEMS-ASSETS> 432,123
<TOTAL-ASSETS> 5,832,878,277
<PAYABLE-FOR-SECURITIES> 24,118,260
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 13,391,545
<TOTAL-LIABILITIES> 37,509,805
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,966,557,252
<SHARES-COMMON-STOCK> 68,668,350
<SHARES-COMMON-PRIOR> 62,581,931
<ACCUMULATED-NII-CURRENT> 13,109,817
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 403,248,149
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 412,453,254
<NET-ASSETS> 1,908,541,588
<DIVIDEND-INCOME> 11,056,742
<INTEREST-INCOME> 13,334,612
<OTHER-INCOME> 0
<EXPENSES-NET> 12,654,108
<NET-INVESTMENT-INCOME> 11,737,246
<REALIZED-GAINS-CURRENT> 38,637,876
<APPREC-INCREASE-CURRENT> (240,283,299)
<NET-CHANGE-FROM-OPS> (189,908,177)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,450,147
<NUMBER-OF-SHARES-REDEEMED> 1,363,728
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 106,113,777
<ACCUMULATED-NII-PRIOR> 1,372,571
<ACCUMULATED-GAINS-PRIOR> 364,610,273
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,428,137
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 12,654,108
<AVERAGE-NET-ASSETS> 1,818,318,319
<PER-SHARE-NAV-BEGIN> 28.77
<PER-SHARE-NII> 0.04
<PER-SHARE-GAIN-APPREC> (1.02)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 27.79
<EXPENSE-RATIO> 1.74
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 823483
<NAME> OPPENHEIMER MAIN STREET INCOME & GROWTH -C
<SERIES>
<NUMBER> 2
<NAME> OPPENHEIMER MAIN STREET FUNDS, INC.
<S> <C>
<PERIOD-TYPE> 2-MOS
<FISCAL-YEAR-END> AUG-31-1996
<PERIOD-START> JUL-01-1996
<PERIOD-END> AUG-31-1996
<INVESTMENTS-AT-COST> 5,367,879,904
<INVESTMENTS-AT-VALUE> 5,781,097,220
<RECEIVABLES> 51,305,771
<ASSETS-OTHER> 43,163
<OTHER-ITEMS-ASSETS> 432,123
<TOTAL-ASSETS> 5,832,878,277
<PAYABLE-FOR-SECURITIES> 24,118,260
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 13,391,545
<TOTAL-LIABILITIES> 37,509,805
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,966,557,252
<SHARES-COMMON-STOCK> 26,786,091
<SHARES-COMMON-PRIOR> 25,788,010
<ACCUMULATED-NII-CURRENT> 13,109,817
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 403,248,149
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 412,453,254
<NET-ASSETS> 744,002,221
<DIVIDEND-INCOME> 11,056,742
<INTEREST-INCOME> 13,334,612
<OTHER-INCOME> 0
<EXPENSES-NET> 12,654,108
<NET-INVESTMENT-INCOME> 11,737,246
<REALIZED-GAINS-CURRENT> 38,637,876
<APPREC-INCREASE-CURRENT> (240,283,299)
<NET-CHANGE-FROM-OPS> (189,908,177)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,781,668
<NUMBER-OF-SHARES-REDEEMED> 783,587
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 106,113,777
<ACCUMULATED-NII-PRIOR> 1,372,571
<ACCUMULATED-GAINS-PRIOR> 364,610,273
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,428,137
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 12,654,108
<AVERAGE-NET-ASSETS> 730,259,773
<PER-SHARE-NAV-BEGIN> 28.75
<PER-SHARE-NII> 0.04
<PER-SHARE-GAIN-APPREC> (1.01)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 27.78
<EXPENSE-RATIO> 1.73
<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> 823483
<NAME> OPP. MAIN STREET CALIFORNIA MUNICIPAL FUND-A
<SERIES>
<NUMBER> 5
<NAME> OPPEMHEIMER MAIN STREET FUNDS, INC.
<S> <C>
<PERIOD-TYPE> 2-MOS
<FISCAL-YEAR-END> AUG-31-1996
<PERIOD-START> JUL-01-1996
<PERIOD-END> AUG-31-1996
<INVESTMENTS-AT-COST> 82,016,413
<INVESTMENTS-AT-VALUE> 82,015,165
<RECEIVABLES> 1,121,451
<ASSETS-OTHER> 4,852
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 83,141,468
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 396,399
<TOTAL-LIABILITIES> 396,399
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 82,137,591
<SHARES-COMMON-STOCK> 6,318,241
<SHARES-COMMON-PRIOR> 6,328,049
<ACCUMULATED-NII-CURRENT> 598,945
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,187
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7,346
<NET-ASSETS> 76,817,365
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 927,063
<OTHER-INCOME> 0
<EXPENSES-NET> 88,044
<NET-INVESTMENT-INCOME> 839,019
<REALIZED-GAINS-CURRENT> (42,708)
<APPREC-INCREASE-CURRENT> 52,839
<NET-CHANGE-FROM-OPS> 849,150
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 773,949
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 67,135
<NUMBER-OF-SHARES-REDEEMED> 116,433
<SHARES-REINVESTED> 39,490
<NET-CHANGE-IN-ASSETS> 390,014
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 14,344
<OVERDISTRIB-NII-PRIOR> 132,853
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 56,478
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 91,427
<AVERAGE-NET-ASSETS> 77,584,000
<PER-SHARE-NAV-BEGIN> 12.15
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 0.01
<PER-SHARE-DIVIDEND> 0.12
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 12.16
<EXPENSE-RATIO> 0.57
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 823483
<NAME> OPP. MAIN STREET CALIFORNIA MUNICIPAL FUND-B
<SERIES>
<NUMBER> 5
<NAME> OPPEMHEIMER MAIN STREET FUNDS, INC.
<S> <C>
<PERIOD-TYPE> 2-MOS
<FISCAL-YEAR-END> AUG-31-1996
<PERIOD-START> JUL-01-1996
<PERIOD-END> AUG-31-1996
<INVESTMENTS-AT-COST> 82,016,413
<INVESTMENTS-AT-VALUE> 82,015,165
<RECEIVABLES> 1,121,451
<ASSETS-OTHER> 4,852
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 83,141,468
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 396,399
<TOTAL-LIABILITIES> 396,399
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 82,137,591
<SHARES-COMMON-STOCK> 488,126
<SHARES-COMMON-PRIOR> 448,274
<ACCUMULATED-NII-CURRENT> 598,945
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,187
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7,346
<NET-ASSETS> 5,927,704
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 927,063
<OTHER-INCOME> 0
<EXPENSES-NET> 88,044
<NET-INVESTMENT-INCOME> 839,019
<REALIZED-GAINS-CURRENT> (42,708)
<APPREC-INCREASE-CURRENT> 52,839
<NET-CHANGE-FROM-OPS> 849,150
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 47,009
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 44,022
<NUMBER-OF-SHARES-REDEEMED> 6,620
<SHARES-REINVESTED> 2,450
<NET-CHANGE-IN-ASSETS> 390,014
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 14,344
<OVERDISTRIB-NII-PRIOR> 132,853
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 56,478
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 91,427
<AVERAGE-NET-ASSETS> 5,767,000
<PER-SHARE-NAV-BEGIN> 12.14
<PER-SHARE-NII> 0.10
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.10
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 12.14
<EXPENSE-RATIO> 1.62
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
