<PAGE> PAGE 1
000 A000000 06/30/97
000 C000000 0000915757
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 PRINCIPAL AGGRESSIVE GROWTH FUND, INC.
001 B000000 811-08176
001 C000000 5152475476
002 A000000 THE PRINCIPAL FINANCIAL GROUP
002 B000000 DES MOINES
002 C000000 IA
002 D010000 50392
002 D020000 0200
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
020 A000001 GOLDMAN SACHS CO.
020 B000001 13-5108880
020 C000001 13
020 A000002 FIRST BOSTON CORP.
020 B000002 13-5659485
020 C000002 12
020 A000003 BEAR STEARNS & COMPANIES
020 B000003 13-3299429
020 C000003 12
020 A000004 MORGAN, J.P. SECURITIES
020 B000004 13-3224016
020 C000004 11
020 A000005 LEHMAN BROTHERS
020 B000005 13-2501865
020 C000005 10
020 A000006 MONTGOMERY SECURITIES
020 B000006 94-1701676
020 C000006 10
020 A000007 BERTSTEIN, SANFORD C.
020 B000007 13-2625074
020 C000007 9
020 A000008 INSTINET CO.
020 B000008 13-2596491
020 C000008 8
020 A000009 SALOMON BROTHERS
020 B000009 13-3082694
020 C000009 8
020 A000010 ALEX BROWN & SONS
<PAGE> PAGE 2
020 B000010 52-0256630
020 C000010 7
021 000000 186
022 A000001 MERRILL LYNCH
022 B000001 13-5674085
022 C000001 4012
022 D000001 3184
022 A000002 GOLDMAN SACHS CO.
022 B000002 13-5108880
022 C000002 1768
022 D000002 2627
022 A000003 ALEX BROWN & SONS
022 B000003 52-0256630
022 C000003 1441
022 D000003 769
022 A000004 DONALDSON, LUFKIN & JENRETTE (DLJ)
022 B000004 13-2741729
022 C000004 883
022 D000004 980
022 A000005 SMITH BARNEY SHEARSON
022 B000005 13-2869611
022 C000005 779
022 D000005 556
022 A000006 HERZOG, HEINE & GEDULD
022 B000006 13-1955436
022 C000006 387
022 D000006 644
022 A000007 FIRST BOSTON CORP.
022 B000007 13-5659485
022 C000007 709
022 D000007 284
022 A000008 BEAR STEARNS & CO.
022 B000008 13-3299429
022 C000008 763
022 D000008 204
022 A000009 MORGAN, J.P. SECURITIES
022 B000009 13-3224016
022 C000009 952
022 D000009 0
022 A000010 PIPER, JAFFRAY, HOPWOOD
022 B000010 41-0953246
022 C000010 530
022 D000010 285
023 C000000 13930
023 D000000 12028
027 000000 Y
028 A010000 2372
028 A020000 0
028 A030000 0
028 A040000 96
028 B010000 3493
<PAGE> PAGE 3
028 B020000 2360
028 B030000 0
028 B040000 124
028 C010000 2922
028 C020000 0
028 C030000 0
028 C040000 4043
028 D010000 3681
028 D020000 0
028 D030000 0
028 D040000 3882
028 E010000 7651
028 E020000 0
028 E030000 0
028 E040000 4047
028 F010000 4234
028 F020000 0
028 F030000 0
028 F040000 5028
028 G010000 24353
028 G020000 2360
028 G030000 0
028 G040000 17220
028 H000000 0
055 A000000 N
055 B000000 N
062 A000000 N
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 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
066 A000000 Y
066 B000000 Y
066 C000000 N
066 D000000 N
066 E000000 N
066 F000000 N
066 G000000 N
<PAGE> PAGE 4
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
071 A000000 90895
071 B000000 85822
071 C000000 95598
071 D000000 90
072 A000000 6
072 B000000 88
072 C000000 477
072 D000000 0
072 E000000 0
072 F000000 395
072 G000000 0
072 H000000 0
072 I000000 0
072 J000000 10
072 K000000 0
072 L000000 0
072 M000000 4
072 N000000 0
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 0
072 S000000 0
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 3
072 X000000 412
072 Y000000 0
072 Z000000 153
072AA000000 6287
072BB000000 0
072CC010000 6377
072CC020000 0
072DD010000 0
072DD020000 0
072EE000000 2900
073 A010000 0.0000
073 A020000 0.0000
073 B000000 0.4540
073 C000000 0.0000
074 A000000 6964
074 B000000 0
074 C000000 0
074 D000000 0
074 E000000 0
074 F000000 103974
<PAGE> PAGE 5
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 597
074 K000000 0
074 L000000 280
074 M000000 0
074 N000000 111815
074 O000000 1223
074 P000000 0
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 1078
074 S000000 0
074 T000000 109514
074 U010000 6844
074 U020000 0
074 V010000 16.00
074 V020000 0.00
074 W000000 0.0000
074 X000000 3
074 Y000000 0
075 A000000 0
075 B000000 99658
076 000000 0.00
077 A000000 N
SIGNATURE A. S. FILEAN
TITLE VICE PRESIDENT
<TABLE> <S> <C>
<ARTICLE> 6
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> JUN-30-1997
<INVESTMENTS-AT-COST> 89,799,677
<INVESTMENTS-AT-VALUE> 103,974,021
<RECEIVABLES> 876,582
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 6,964,282
<TOTAL-ASSETS> 111,814,885
<PAYABLE-FOR-SECURITIES> 1,222,825
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,077,634
<TOTAL-LIABILITIES> 2,300,459
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 88,895,524
<SHARES-COMMON-STOCK> 6,844,217
<SHARES-COMMON-PRIOR> 6,204,681
<ACCUMULATED-NII-CURRENT> 157,768
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 6,286,790
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 14,174,344
<NET-ASSETS> 109,514,426
<DIVIDEND-INCOME> 477,219
<INTEREST-INCOME> 87,889
<OTHER-INCOME> 0
<EXPENSES-NET> (412,133)
<NET-INVESTMENT-INCOME> 0
<REALIZED-GAINS-CURRENT> 6,286,602
<APPREC-INCREASE-CURRENT> 6,376,545
<NET-CHANGE-FROM-OPS> 12,816,122
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 152,975
<DISTRIBUTIONS-OF-GAINS> (2,899,788)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,617,616
<NUMBER-OF-SHARES-REDEEMED> (1,138,622)
<SHARES-REINVESTED> 160,542
<NET-CHANGE-IN-ASSETS> 19,408,877
<ACCUMULATED-NII-PRIOR> 4,793
<ACCUMULATED-GAINS-PRIOR> 2,899,976
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 395,273
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 412,133
<AVERAGE-NET-ASSETS> 100,457,122
<PER-SHARE-NAV-BEGIN> 14.52
<PER-SHARE-NII> .02
<PER-SHARE-GAIN-APPREC> 1.91
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.45)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.00
<EXPENSE-RATIO> .83
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>