<PAGE> PAGE 1
000 A000000 06/30/98
000 C000000 0000700662
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 PRUDENTIAL MORTGAGE INCOME FUND, INC.
001 B000000 811-3397
001 C000000 9733677530
002 A000000 100 MULBERRY STREET
002 B000000 NEWARK
002 C000000 NJ
002 D010000 07102
002 D020000 4077
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 THE PRUDENTIAL INVESTMENT CORPORATION
008 B000001 S
008 C000001 801-22808
008 D010001 NEWARK
008 D020001 NJ
008 D030001 07101
008 A000002 PRUDENTIAL INVESTMENT FUND MANAGEMENT LLC
008 B000002 A
008 C000002 801-31104
008 D010002 NEWARK
008 D020002 NJ
008 D030002 07102
008 D040002 4077
011 A000001 PRUDENTIAL SECURITIES INCORPORATED
011 B000001 8-27154
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10292
<PAGE> PAGE 2
011 A000002 DELETE
012 A000001 PRUDENTIAL MUTUAL FUND SERVICES LLC
012 B000001 85-4110019
012 C010001 NEW BRUNSWICK
012 C020001 NJ
012 C030001 08906
013 A000001 PRICEWATERHOUSECOOPERS LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10036
014 A000001 PRUDENTIAL SECURITIES INCORPORATED
014 B000001 8-27154
014 A000002 PRUCO SECURITIES CORPORATION
014 B000002 8-16402
014 A000003 PRUDENTIAL INVESTMENTS MANAGEMENT SERVICE LLC
014 B000003 8-36540
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 NORTH QUINCY
015 C020001 MA
015 C030001 02171
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 99
019 C000000 PRUDENTIAL
020 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH, INC.
020 B000001 13-5674085
020 C000001 2
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 2
022 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH, INC.
022 B000001 13-5674085
022 C000001 157671
022 D000001 72166
022 A000002 SALOMON SMITH BARNEY INC.
022 B000002 13-1912900
022 C000002 207987
022 D000002 264
022 A000003 GOLDMAN, SACHS & CO.
022 B000003 13-5108880
022 C000003 195276
022 D000003 8512
<PAGE> PAGE 3
022 A000004 DONALDSON, LUFKIN & JENRETTE SEC. CORP.
022 B000004 13-2741729
022 C000004 95992
022 D000004 79539
022 A000005 BEAR, STEARNS & CO. INC.
022 B000005 13-3299429
022 C000005 162701
022 D000005 0
022 A000006 MORGAN STANLEY, DEAN WITTER, DISCOVER & CO.
022 B000006 13-2655998
022 C000006 102450
022 D000006 8479
022 A000007 CREDIT SUISSE FIRST BOSTON CORP.
022 B000007 13-5659485
022 C000007 97530
022 D000007 4378
022 A000008 LEHMAN BROTHERS INC.
022 B000008 13-2518466
022 C000008 55391
022 D000008 21504
022 A000009 NOMURA SECURITIES INTERNATIONAL, INC.
022 B000009 13-2642206
022 C000009 23822
022 D000009 30087
022 A000010 DEUTSCHE BANK SECURITIES INC.
022 B000010 13-2730828
022 C000010 20965
022 D000010 20116
023 C000000 1327186
023 D000000 277113
024 000000 Y
025 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH, INC.
025 B000001 13-5674085
025 C000001 D
025 D000001 1663
025 A000002 SALOMON SMITH BARNEY, INC.
025 B000002 13-1912900
025 C000002 D
025 D000002 15000
025 A000003 DELETE
025 D000003 0
025 A000004 DELETE
025 D000004 0
025 A000005 DELETE
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 Y
026 C000000 Y
<PAGE> PAGE 4
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A010000 511
028 A020000 358
028 A030000 0
028 A040000 2893
028 B010000 2347
028 B020000 499
028 B030000 0
028 B040000 2949
028 C010000 2078
028 C020000 506
028 C030000 0
028 C040000 4565
028 D010000 2174
028 D020000 504
028 D030000 0
028 D040000 5383
028 E010000 1327
028 E020000 500
028 E030000 0
028 E040000 3271
028 F010000 2779
028 F020000 487
028 F030000 0
028 F040000 6677
028 G010000 11216
028 G020000 2854
028 G030000 0
028 G040000 25738
028 H000000 8564
029 000000 Y
030 A000000 15
030 B000000 4.00
030 C000000 0.50
031 A000000 1
031 B000000 0
032 000000 0
033 000000 14
034 000000 Y
035 000000 53
036 A000000 N
036 B000000 0
037 000000 N
038 000000 0
039 000000 N
<PAGE> PAGE 5
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 325
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.500
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 N
<PAGE> PAGE 6
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 N
054 N000000 N
054 O000000 N
055 A000000 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 N
060 A000000 Y
060 B000000 Y
061 000000 0
062 A000000 Y
062 B000000 0.0
062 C000000 2.8
062 D000000 11.0
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 14.2
062 N000000 56.4
062 O000000 0.0
062 P000000 3.4
062 Q000000 19.9
062 R000000 0.0
063 A000000 0
063 B000000 5.5
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 Y
070 B010000 N
070 B020000 N
070 C010000 Y
070 C020000 Y
070 D010000 N
070 D020000 N
<PAGE> PAGE 7
070 E010000 Y
070 E020000 Y
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 N
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 Y
070 O010000 Y
070 O020000 Y
070 P010000 N
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 272103
071 B000000 277113
071 C000000 158987
071 D000000 171
072 A000000 6
072 B000000 5809
072 C000000 0
072 D000000 0
072 E000000 28
072 F000000 396
072 G000000 0
072 H000000 0
072 I000000 136
072 J000000 67
072 K000000 0
072 L000000 31
072 M000000 11
072 N000000 22
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 14
072 S000000 8
<PAGE> PAGE 8
072 T000000 325
072 U000000 0
072 V000000 0
072 W000000 8
072 X000000 1018
072 Y000000 0
072 Z000000 4819
072AA000000 2246
072BB000000 1273
072CC010000 0
072CC020000 2859
072DD010000 1906
072DD020000 2835
072EE000000 0
073 A010000 0.0000
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 90
074 B000000 16663
074 C000000 4313
074 D000000 142561
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 68
074 J000000 33598
074 K000000 0
074 L000000 1192
074 M000000 3
074 N000000 198488
074 O000000 45606
074 P000000 155
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 28
074 R040000 927
074 S000000 0
074 T000000 151772
074 U010000 4255
074 U020000 6319
074 V010000 0.00
074 V020000 0.00
074 W000000 0.0000
074 X000000 15876
074 Y000000 0
075 A000000 0
075 B000000 159652
076 000000 0.00
<PAGE> PAGE 9
077 A000000 N
078 000000 N
080 A000000 ICI MUTUAL INSURANCE COMPANY
080 C000000 65000
081 A000000 Y
081 B000000 78
082 A000000 N
082 B000000 0
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
SIGNATURE GRACE TORRES
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000700662
<NAME> PRUDENTIAL MORTGAGE INCOME FUND, INC.
<SERIES>
<NUMBER> 001
<NAME> MORTGAGE INCOME FUND (CLASS A)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 162,787,973
<INVESTMENTS-AT-VALUE> 163,604,613
<RECEIVABLES> 34,791,167
<ASSETS-OTHER> 92,676
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 0
<PAYABLE-FOR-SECURITIES> 45,605,854
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,110,134
<TOTAL-LIABILITIES> 0
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 169,000,080
<SHARES-COMMON-STOCK> 10,573,698
<SHARES-COMMON-PRIOR> 11,384,216
<ACCUMULATED-NII-CURRENT> 842,352
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (18,888,948)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 818,984
<NET-ASSETS> (21,957,914)
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5,808,901
<OTHER-INCOME> 27,585
<EXPENSES-NET> 1,017,504
<NET-INVESTMENT-INCOME> 4,818,982
<REALIZED-GAINS-CURRENT> 973,253
<APPREC-INCREASE-CURRENT> (2,858,782)
<NET-CHANGE-FROM-OPS> 2,933,453
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (4,740,873)
<NUMBER-OF-SHARES-SOLD> 11,215,897
<NUMBER-OF-SHARES-REDEEMED> (25,737,524)
<SHARES-REINVESTED> 2,853,940
<NET-CHANGE-IN-ASSETS> (13,475,107)
<ACCUMULATED-NII-PRIOR> 764,243
<ACCUMULATED-GAINS-PRIOR> (24,208,368)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 395,850
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,017,504
<AVERAGE-NET-ASSETS> 90,304,000
<PER-SHARE-NAV-BEGIN> 14.53
<PER-SHARE-NII> 0.29
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.45)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 14.37
<EXPENSE-RATIO> 1.03
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000700662
<NAME> PRUDENTIAL MORTGAGE INCOME FUND, INC.
<SERIES>
<NUMBER> 002
<NAME> MORTGAGE INCOME FUND (CLASS B)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 162,787,973
<INVESTMENTS-AT-VALUE> 163,604,613
<RECEIVABLES> 34,791,167
<ASSETS-OTHER> 92,676
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 0
<PAYABLE-FOR-SECURITIES> 45,605,854
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,110,134
<TOTAL-LIABILITIES> 0
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 169,000,080
<SHARES-COMMON-STOCK> 10,573,698
<SHARES-COMMON-PRIOR> 11,384,216
<ACCUMULATED-NII-CURRENT> 842,352
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (18,888,948)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 818,984
<NET-ASSETS> (21,957,914)
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5,808,901
<OTHER-INCOME> 27,585
<EXPENSES-NET> 1,017,504
<NET-INVESTMENT-INCOME> 4,818,982
<REALIZED-GAINS-CURRENT> 973,253
<APPREC-INCREASE-CURRENT> (2,858,782)
<NET-CHANGE-FROM-OPS> 2,933,453
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (4,740,873)
<NUMBER-OF-SHARES-SOLD> 11,215,897
<NUMBER-OF-SHARES-REDEEMED> (25,737,524)
<SHARES-REINVESTED> 2,853,940
<NET-CHANGE-IN-ASSETS> (13,475,107)
<ACCUMULATED-NII-PRIOR> 764,243
<ACCUMULATED-GAINS-PRIOR> (24,208,368)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 395,850
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,017,504
<AVERAGE-NET-ASSETS> 68,257,000
<PER-SHARE-NAV-BEGIN> 14.50
<PER-SHARE-NII> 0.24
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.41)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 14.33
<EXPENSE-RATIO> 1.63
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000700662
<NAME> PRUDENTIAL MORTGAGE INCOME FUND, INC.
<SERIES>
<NUMBER> 003
<NAME> MORTGAGE INCOME FUND (CLASS C)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 162,787,973
<INVESTMENTS-AT-VALUE> 163,604,613
<RECEIVABLES> 34,791,167
<ASSETS-OTHER> 92,676
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 0
<PAYABLE-FOR-SECURITIES> 45,605,854
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,110,134
<TOTAL-LIABILITIES> 0
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 169,000,080
<SHARES-COMMON-STOCK> 10,573,698
<SHARES-COMMON-PRIOR> 11,384,216
<ACCUMULATED-NII-CURRENT> 842,352
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (18,888,948)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 818,984
<NET-ASSETS> (21,957,914)
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5,808,901
<OTHER-INCOME> 27,585
<EXPENSES-NET> 1,017,504
<NET-INVESTMENT-INCOME> 4,818,982
<REALIZED-GAINS-CURRENT> 973,253
<APPREC-INCREASE-CURRENT> (2,858,782)
<NET-CHANGE-FROM-OPS> 2,933,453
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (4,740,873)
<NUMBER-OF-SHARES-SOLD> 11,215,897
<NUMBER-OF-SHARES-REDEEMED> (25,737,524)
<SHARES-REINVESTED> 2,853,940
<NET-CHANGE-IN-ASSETS> (13,475,107)
<ACCUMULATED-NII-PRIOR> 764,243
<ACCUMULATED-GAINS-PRIOR> (24,208,368)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 395,850
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,017,504
<AVERAGE-NET-ASSETS> 997,000
<PER-SHARE-NAV-BEGIN> 14.50
<PER-SHARE-NII> 0.24
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.41)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 14.33
<EXPENSE-RATIO> 1.63
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000700662
<NAME> PRUDENTIAL MORTGAGE INCOME FUND, INC.
<SERIES>
<NUMBER> 004
<NAME> MORTGAGE INCOME FUND (CLASS Z)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 162,787,973
<INVESTMENTS-AT-VALUE> 163,604,613
<RECEIVABLES> 34,791,167
<ASSETS-OTHER> 92,676
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 0
<PAYABLE-FOR-SECURITIES> 45,605,854
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,110,134
<TOTAL-LIABILITIES> 0
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 169,000,080
<SHARES-COMMON-STOCK> 10,573,698
<SHARES-COMMON-PRIOR> 11,384,216
<ACCUMULATED-NII-CURRENT> 842,352
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (18,888,948)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 818,984
<NET-ASSETS> (21,957,914)
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5,808,901
<OTHER-INCOME> 27,585
<EXPENSES-NET> 1,017,504
<NET-INVESTMENT-INCOME> 4,818,982
<REALIZED-GAINS-CURRENT> 973,253
<APPREC-INCREASE-CURRENT> (2,858,782)
<NET-CHANGE-FROM-OPS> 2,933,453
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (4,740,873)
<NUMBER-OF-SHARES-SOLD> 11,215,897
<NUMBER-OF-SHARES-REDEEMED> (25,737,524)
<SHARES-REINVESTED> 2,853,940
<NET-CHANGE-IN-ASSETS> (13,475,107)
<ACCUMULATED-NII-PRIOR> 764,243
<ACCUMULATED-GAINS-PRIOR> (24,208,368)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 395,850
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,017,504
<AVERAGE-NET-ASSETS> 94,000
<PER-SHARE-NAV-BEGIN> 14.54
<PER-SHARE-NII> 0.31
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.46)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 14.39
<EXPENSE-RATIO> 0.88
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
