<PAGE> PAGE 1
000 B000000 12/31/1999
000 C000000 0000806628
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 U
001 A000000 DUFF & PHELPS UTILITIES INCOME INC.
001 B000000 811-4915
001 C000000 5025888603
002 A000000 P.O. BOX 32760
002 B000000 LOUISVILLE
002 C000000 KY
002 D010000 40232
002 D020000 2760
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 DUFF & PHELPS INVESTMENT MANAGEMENT CO.
008 B000001 A
008 C000001 801-14813
008 D010001 CHICAGO
008 D020001 IL
008 D030001 60603
010 A000001 J.J.B. HILLIARD, W.L. LYONS, INC.
010 B000001 801-23120
010 C010001 LOUISVILLE
010 C020001 KY
010 C030001 40202
012 A000001 THE BANK OF NEW YORK
012 B000001 85-5006
012 C010001 NEW YORK
012 C020001 NY
012 C030001 10286
014 A000001 J.J.B HILLIARD,W.L. LYONS, INC.
014 B000001 8-33133
<PAGE> PAGE 2
015 A000001 THE BANK OF NEW YORK
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10286
015 E010001 X
018 000000 Y
019 A000000 N
019 B000000 0
020 A000001 MERRILL LYNCH & COMPANY INC.
020 B000001 13-5674085
020 C000001 7413
020 A000002 SMITH BARNEY HOLDINGS INC.
020 B000002 13-1912900
020 C000002 185
020 A000003 GOLDMAN SACHS GROUP LP
020 B000003 13-5108880
020 C000003 115
020 A000004 PAINEWEBBER INC.
020 B000004 13-2638166
020 C000004 83
020 A000005 MORGAN STANLEY GROUP INC.
020 B000005 13-2655998
020 C000005 80
020 A000006 ROBERT W. BAIRD & CO, INC.
020 B000006 39-6037917
020 C000006 72
020 A000007 DONALDSON, LUFKIN & JENRETTE CORP.
020 B000007 13-2741729
020 C000007 71
020 A000008 CREDIT SUISSE FIRST BOSTON INC.
020 C000008 70
020 A000009 PRUDENTIAL SECURITIES INC.
020 B000009 22-2347336
020 C000009 62
020 A000010 BRIDGE TRADING CO.
020 C000010 61
021 000000 8511
022 A000001 LEHMAN BROTHERS HOLDINGS INC.
022 B000001 13-2518466
022 C000001 53891
022 D000001 0
022 A000002 MERRILL LYNCH & COMPANY INC.
022 B000002 13-5674085
022 C000002 38955
022 D000002 13307
022 A000003 TUCKER ANTHONY INC.
022 B000003 04-2236023
022 C000003 35079
022 D000003 8080
022 A000004 THE BANK OF NEW YORK
<PAGE> PAGE 3
022 C000004 0
022 D000004 32997
022 A000005 SALOMON INC.
022 C000005 3500
022 D000005 25844
022 A000006 GOLDMAN SACHS GROUP LP
022 B000006 13-5108880
022 C000006 11108
022 D000006 10274
022 A000007 MORGAN STANLEY GROUP INC.
022 B000007 13-2655998
022 C000007 19054
022 D000007 0
022 A000008 FIRST UNION NATIONAL BANK
022 C000008 14548
022 D000008 0
022 A000009 SMITH BARNEY HOLDINGS INC.
022 B000009 13-1912900
022 C000009 11272
022 D000009 0
022 A000010 ROBERT W. BAIRD & CO. INC.
022 B000010 39-6037917
022 C000010 6528
022 D000010 4503
023 C000000 251791
023 D000000 114098
024 000000 N
025 D000001 0
025 D000002 0
025 D000003 0
025 D000004 0
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.000
048 A010000 1500000
048 A020000 0.600
<PAGE> PAGE 4
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 1500000
048 K020000 0.500
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 N
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
058 B000000 N
058 C000000 N
058 D000000 N
058 E000000 N
059 000000 Y
060 A000000 Y
<PAGE> PAGE 5
060 B000000 Y
061 000000 0
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
063 A000000 0
063 B000000 0.0
066 A000000 Y
066 B000000 N
066 C000000 N
066 D000000 N
066 E000000 N
066 F000000 Y
066 G000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 N
070 A020000 N
070 B010000 Y
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 Y
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
070 H020000 N
070 I010000 N
070 I020000 N
<PAGE> PAGE 6
070 J010000 Y
070 J020000 N
070 K010000 Y
070 K020000 N
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 Y
070 N020000 Y
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 5830838
071 B000000 5764242
071 C000000 2575896
071 D000000 224
072 A000000 12
072 B000000 57941
072 C000000 157461
072 D000000 0
072 E000000 1660
072 F000000 14839
072 G000000 3718
072 H000000 0
072 I000000 554
072 J000000 335
072 K000000 533
072 L000000 0
072 M000000 218
072 N000000 0
072 O000000 0
072 P000000 10362
072 Q000000 0
072 R000000 73
072 S000000 101
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 1865
072 X000000 32598
072 Y000000 0
072 Z000000 184464
072AA000000 0
072BB000000 88191
072CC010000 0
<PAGE> PAGE 7
072CC020000 243399
072DD010000 183604
072DD020000 0
072EE000000 0
073 A010000 0.7800
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 76234
074 B000000 0
074 C000000 0
074 D000000 607243
074 E000000 145695
074 F000000 1694935
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 22871
074 M000000 30
074 N000000 2547008
074 O000000 0
074 P000000 3604
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 215276
074 S000000 500000
074 T000000 1828128
074 U010000 208479
074 U020000 0
074 V010000 8.77
074 V020000 0.00
074 W000000 0.0000
074 X000000 32574
074 Y000000 0
075 A000000 0
075 B000000 2461469
076 000000 8.31
077 A000000 Y
077 B000000 Y
077 Q010000 N
077 Q020000 N
077 Q030000 N
078 000000 N
080 A000000 NATIONAL UNION FIRE INSURANCE CO.
080 C000000 25000
081 A000000 Y
081 B000000 80
<PAGE> PAGE 8
082 A000000 Y
082 B000000 25000
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 2765
086 A020000 27167
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 525000
086 E020000 513748
086 F010000 525000
086 F020000 525000
087 A010000 DUFF & PHELPS UTILITIES INCOME INC.
087 A020000 264324104
087 A030000 DNP
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE DIANNA P. WENGLER
TITLE ASST SECRETARY
Report of Independent Auditors
To the Stockholders and Board of Directors of
Duff & Phelps Utilities Income Inc.
In planning and performing our audit of the
financial statements of Duff & Phelps Utilities
Income, Inc. for the year ended December 31,1999, we
considered its internal control, including control
activities 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 internal control.
The management of Duff & Phelps Utilities Income
Inc. is responsible for establishing and maintaining
internal control. In fulfilling this responsibility,
estimates and judgments by management are required to
assess the expected benefits and related costs of
controls. Generally, controls that are relevant to
an audit pertain to the entity's objective of
preparing financial statements for external purposes
that are fairly presented in conformity with
generally accepted accounting principles. Those
controls include the safeguarding of assets against
unauthorized acquisition, use or disposition.
Because of inherent limitations in internal control,
error or fraud may occur and not be detected. Also,
projection of any evaluation of internal control 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 internal control would not
necessarily disclose all matters in internal control
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 one or
more of the internal control components does not
reduce to a relatively low level the risk that
misstatements caused by error or fraud 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 internal control and its operation,
including controls for safeguarding securities, that
we consider to be material weaknesses as
defined above at December 31, 1999.
This report is intended solely for the information
and use of management, the Board of Directors of
Duff & Phelps Utilities Income Inc. and the
Securities and Exchange Commission.
\s\Arthur Andersen LLP
Chicago, Illinois
February 4, 2000
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000806628
<NAME> DUFF & PHELPS UTILITIES INCOME INC.
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> DEC-31-1999
<INVESTMENTS-AT-COST> 2364071604
<INVESTMENTS-AT-VALUE> 2447872516
<RECEIVABLES> 22871662
<ASSETS-OTHER> 76264449
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2547008627
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 218880270
<TOTAL-LIABILITIES> 218880270
<SENIOR-EQUITY> 500000000
<PAID-IN-CAPITAL-COMMON> 1860724394
<SHARES-COMMON-STOCK> 208478761
<SHARES-COMMON-PRIOR> 205714255
<ACCUMULATED-NII-CURRENT> 3028096
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (119633230)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 83800619
<NET-ASSETS> 2328128357
<DIVIDEND-INCOME> 157461332
<INTEREST-INCOME> 57940878
<OTHER-INCOME> 1659829
<EXPENSES-NET> 32597671
<NET-INVESTMENT-INCOME> 184464368
<REALIZED-GAINS-CURRENT> (88191091)
<APPREC-INCREASE-CURRENT> (243399166)
<NET-CHANGE-FROM-OPS> (331590257)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 183604270
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 2764506
<NET-CHANGE-IN-ASSETS> (147125889)
<ACCUMULATED-NII-PRIOR> 2167997
<ACCUMULATED-GAINS-PRIOR> (43412477)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 14839366
<INTEREST-EXPENSE> 10361867
<GROSS-EXPENSE> 32597671
<AVERAGE-NET-ASSETS> 2461468946
<PER-SHARE-NAV-BEGIN> 10.36
<PER-SHARE-NII> .89
<PER-SHARE-GAIN-APPREC> (1.59)
<PER-SHARE-DIVIDEND> .89
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.77
<EXPENSE-RATIO> 1.66
</TABLE>
