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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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SIGNATURE JOHN H. COSTELLO
TITLE ASSISTANT TREASURER
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49,821
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0
<OTHER-ITEMS-LIABILITIES>
1,909
<TOTAL-LIABILITIES>
51,730
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
519,208
<SHARES-COMMON-STOCK>
144
<SHARES-COMMON-PRIOR>
0
<ACCUMULATED-NII-CURRENT>
231
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
3,997
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
10,456
<NET-ASSETS>
533,892
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
35,932
<OTHER-INCOME>
0
<EXPENSES-NET>
3,739
<NET-INVESTMENT-INCOME>
32,193
<REALIZED-GAINS-CURRENT>
4,297
<APPREC-INCREASE-CURRENT>
14,164
<NET-CHANGE-FROM-OPS>
50,654
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
22
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
142
<NUMBER-OF-SHARES-REDEEMED>
0
<SHARES-REINVESTED>
2
<NET-CHANGE-IN-ASSETS>
45,730
<ACCUMULATED-NII-PRIOR>
923
<ACCUMULATED-GAINS-PRIOR>
5,975
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
2,274
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
3,792
<AVERAGE-NET-ASSETS>
857
<PER-SHARE-NAV-BEGIN>
10.830
<PER-SHARE-NII>
.268
<PER-SHARE-GAIN-APPREC>
.224
<PER-SHARE-DIVIDEND>
.272
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
11.050
<EXPENSE-RATIO>
90
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000751199
<NAME> Fidelity Income Fund
<SERIES>
<NUMBER> 15
<NAME> Fidelity Mortgage Securities Fund
- Institutional Class
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
year
<FISCAL-YEAR-END>
jul-31-1997
<PERIOD-END>
jul-31-1997
<INVESTMENTS-AT-COST>
571,804
<INVESTMENTS-AT-VALUE>
582,260
<RECEIVABLES>
3,317
<ASSETS-OTHER>
45
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
585,622
<PAYABLE-FOR-SECURITIES>
49,821
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
1,909
<TOTAL-LIABILITIES>
51,730
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
519,208
<SHARES-COMMON-STOCK>
1,193
<SHARES-COMMON-PRIOR>
0
<ACCUMULATED-NII-CURRENT>
231
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
3,997
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
10,456
<NET-ASSETS>
533,892
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
35,932
<OTHER-INCOME>
0
<EXPENSES-NET>
3,739
<NET-INVESTMENT-INCOME>
32,193
<REALIZED-GAINS-CURRENT>
4,297
<APPREC-INCREASE-CURRENT>
14,164
<NET-CHANGE-FROM-OPS>
50,654
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
81
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
1,216
<NUMBER-OF-SHARES-REDEEMED>
26
<SHARES-REINVESTED>
3
<NET-CHANGE-IN-ASSETS>
45,730
<ACCUMULATED-NII-PRIOR>
923
<ACCUMULATED-GAINS-PRIOR>
5,975
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
2,274
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
3,792
<AVERAGE-NET-ASSETS>
3,009
<PER-SHARE-NAV-BEGIN>
10.830
<PER-SHARE-NII>
.263
<PER-SHARE-GAIN-APPREC>
.226
<PER-SHARE-DIVIDEND>
.279
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
11.040
<EXPENSE-RATIO>
75
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000751199
<NAME> Fidelity Income Fund
<SERIES>
<NUMBER> 13
<NAME> Fidelity Mortgage Securities Fund
- Class T
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
year
<FISCAL-YEAR-END>
jul-31-1997
<PERIOD-END>
jul-31-1997
<INVESTMENTS-AT-COST>
571,804
<INVESTMENTS-AT-VALUE>
582,260
<RECEIVABLES>
3,317
<ASSETS-OTHER>
45
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
585,622
<PAYABLE-FOR-SECURITIES>
49,821
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
1,909
<TOTAL-LIABILITIES>
51,730
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
519,208
<SHARES-COMMON-STOCK>
1,104
<SHARES-COMMON-PRIOR>
0
<ACCUMULATED-NII-CURRENT>
231
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
3,997
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
10,456
<NET-ASSETS>
533,892
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
35,932
<OTHER-INCOME>
0
<EXPENSES-NET>
3,739
<NET-INVESTMENT-INCOME>
32,193
<REALIZED-GAINS-CURRENT>
4,297
<APPREC-INCREASE-CURRENT>
14,164
<NET-CHANGE-FROM-OPS>
50,654
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
64
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
1,114
<NUMBER-OF-SHARES-REDEEMED>
16
<SHARES-REINVESTED>
6
<NET-CHANGE-IN-ASSETS>
45,730
<ACCUMULATED-NII-PRIOR>
923
<ACCUMULATED-GAINS-PRIOR>
5,975
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
2,274
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
3,792
<AVERAGE-NET-ASSETS>
2,558
<PER-SHARE-NAV-BEGIN>
10.830
<PER-SHARE-NII>
.255
<PER-SHARE-GAIN-APPREC>
.233
<PER-SHARE-DIVIDEND>
.268
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
11.050
<EXPENSE-RATIO>
100
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000751199
<NAME> Fidelity Income Fund
<SERIES>
<NUMBER> 14
<NAME> Fidelity Mortgage Securities Fund
- Class B
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
year
<FISCAL-YEAR-END>
jul-31-1997
<PERIOD-END>
jul-31-1997
<INVESTMENTS-AT-COST>
571,804
<INVESTMENTS-AT-VALUE>
582,260
<RECEIVABLES>
3,317
<ASSETS-OTHER>
45
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
585,622
<PAYABLE-FOR-SECURITIES>
49,821
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
1,909
<TOTAL-LIABILITIES>
51,730
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
519,208
<SHARES-COMMON-STOCK>
75
<SHARES-COMMON-PRIOR>
0
<ACCUMULATED-NII-CURRENT>
231
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
3,997
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
10,456
<NET-ASSETS>
533,892
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
35,932
<OTHER-INCOME>
0
<EXPENSES-NET>
3,739
<NET-INVESTMENT-INCOME>
32,193
<REALIZED-GAINS-CURRENT>
4,297
<APPREC-INCREASE-CURRENT>
14,164
<NET-CHANGE-FROM-OPS>
50,654
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
8
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
74
<NUMBER-OF-SHARES-REDEEMED>
0
<SHARES-REINVESTED>
1
<NET-CHANGE-IN-ASSETS>
45,730
<ACCUMULATED-NII-PRIOR>
923
<ACCUMULATED-GAINS-PRIOR>
5,975
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
2,274
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
3,792
<AVERAGE-NET-ASSETS>
371
<PER-SHARE-NAV-BEGIN>
10.830
<PER-SHARE-NII>
.234
<PER-SHARE-GAIN-APPREC>
.214
<PER-SHARE-DIVIDEND>
.238
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
11.040
<EXPENSE-RATIO>
165
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000751199
<NAME> Fidelity Income Fund
<SERIES>
<NUMBER> 11
<NAME> Fidelity Mortgage Securities Fund
- Initial Class
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
year
<FISCAL-YEAR-END>
jul-31-1997
<PERIOD-END>
jul-31-1997
<INVESTMENTS-AT-COST>
571,804
<INVESTMENTS-AT-VALUE>
582,260
<RECEIVABLES>
3,317
<ASSETS-OTHER>
45
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
585,622
<PAYABLE-FOR-SECURITIES>
49,821
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
1,909
<TOTAL-LIABILITIES>
51,730
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
519,208
<SHARES-COMMON-STOCK>
45,797
<SHARES-COMMON-PRIOR>
45,303
<ACCUMULATED-NII-CURRENT>
231
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
3,997
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
10,456
<NET-ASSETS>
533,892
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
35,932
<OTHER-INCOME>
0
<EXPENSES-NET>
3,739
<NET-INVESTMENT-INCOME>
32,193
<REALIZED-GAINS-CURRENT>
4,297
<APPREC-INCREASE-CURRENT>
14,164
<NET-CHANGE-FROM-OPS>
50,654
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
32,474
<DISTRIBUTIONS-OF-GAINS>
5,040
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
14,636
<NUMBER-OF-SHARES-REDEEMED>
16,912
<SHARES-REINVESTED>
2,770
<NET-CHANGE-IN-ASSETS>
45,730
<ACCUMULATED-NII-PRIOR>
923
<ACCUMULATED-GAINS-PRIOR>
5,975
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
2,274
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
3,792
<AVERAGE-NET-ASSETS>
511,434
<PER-SHARE-NAV-BEGIN>
10.780
<PER-SHARE-NII>
.678
<PER-SHARE-GAIN-APPREC>
.391
<PER-SHARE-DIVIDEND>
.689
<PER-SHARE-DISTRIBUTIONS>
.110
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
11.050
<EXPENSE-RATIO>
73
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000751199
<NAME> Fidelity Income Fund
<SERIES>
<NUMBER> 21
<NAME> Fidelity Ginnie Mae Fund
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
year
<FISCAL-YEAR-END>
jul-31-1997
<PERIOD-END>
jul-31-1997
<INVESTMENTS-AT-COST>
884,267
<INVESTMENTS-AT-VALUE>
912,992
<RECEIVABLES>
6,927
<ASSETS-OTHER>
0
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
919,919
<PAYABLE-FOR-SECURITIES>
96,111
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
1,673
<TOTAL-LIABILITIES>
97,784
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
832,801
<SHARES-COMMON-STOCK>
75,807
<SHARES-COMMON-PRIOR>
74,991
<ACCUMULATED-NII-CURRENT>
0
<OVERDISTRIBUTION-NII>
1,202
<ACCUMULATED-NET-GAINS>
(38,189)
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
28,725
<NET-ASSETS>
822,135
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
59,610
<OTHER-INCOME>
0
<EXPENSES-NET>
5,980
<NET-INVESTMENT-INCOME>
53,630
<REALIZED-GAINS-CURRENT>
2,497
<APPREC-INCREASE-CURRENT>
20,073
<NET-CHANGE-FROM-OPS>
76,200
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
52,899
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
18,325
<NUMBER-OF-SHARES-REDEEMED>
21,758
<SHARES-REINVESTED>
4,249
<NET-CHANGE-IN-ASSETS>
32,201
<ACCUMULATED-NII-PRIOR>
0
<ACCUMULATED-GAINS-PRIOR>
(42,405)
<OVERDISTRIB-NII-PRIOR>
214
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
3,511
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
6,014
<AVERAGE-NET-ASSETS>
794,213
<PER-SHARE-NAV-BEGIN>
10.530
<PER-SHARE-NII>
.720
<PER-SHARE-GAIN-APPREC>
.310
<PER-SHARE-DIVIDEND>
.710
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
10.850
<EXPENSE-RATIO>
76
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000751199
<NAME> Fidelity Income Fund
<SERIES>
<NUMBER> 31
<NAME> Spartan Limited Maturity Government Fund
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
year
<FISCAL-YEAR-END>
jul-31-1997
<PERIOD-END>
jul-31-1997
<INVESTMENTS-AT-COST>
691,314
<INVESTMENTS-AT-VALUE>
704,801
<RECEIVABLES>
12,841
<ASSETS-OTHER>
0
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
717,642
<PAYABLE-FOR-SECURITIES>
11,881
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
1,362
<TOTAL-LIABILITIES>
13,243
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
750,702
<SHARES-COMMON-STOCK>
71,933
<SHARES-COMMON-PRIOR>
76,686
<ACCUMULATED-NII-CURRENT>
0
<OVERDISTRIBUTION-NII>
140
<ACCUMULATED-NET-GAINS>
(59,650)
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
13,487
<NET-ASSETS>
704,399
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
52,651
<OTHER-INCOME>
0
<EXPENSES-NET>
3,777
<NET-INVESTMENT-INCOME>
48,874
<REALIZED-GAINS-CURRENT>
(3,334)
<APPREC-INCREASE-CURRENT>
12,958
<NET-CHANGE-FROM-OPS>
58,498
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
47,692
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
15,242
<NUMBER-OF-SHARES-REDEEMED>
24,040
<SHARES-REINVESTED>
4,045
<NET-CHANGE-IN-ASSETS>
(35,347)
<ACCUMULATED-NII-PRIOR>
1,047
<ACCUMULATED-GAINS-PRIOR>
(58,684)
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
4,549
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
4,564
<AVERAGE-NET-ASSETS>
702,147
<PER-SHARE-NAV-BEGIN>
9.650
<PER-SHARE-NII>
.675
<PER-SHARE-GAIN-APPREC>
.124
<PER-SHARE-DIVIDEND>
.659
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
9.790
<EXPENSE-RATIO>
54
<AVG-DEBT-OUTSTANDING>
0
<AVG-DEBT-PER-SHARE>
0
</TABLE>
