PAGE  1
000 B000000 04/30/2013
000 C000000 0001388126
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 U
001 A000000 PIONEER DIVERSIFIED HIGH INCOME TRUST
001 B000000 811-22014
001 C000000 6177427825
002 A000000 60 STATE STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02109
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 PIONEER INVESTMENT MANAGEMENT, INC.
008 B000001 A
008 C000001 801-8255
008 D010001 BOSTON
008 D020001 MA
008 D030001 02109
008 A000002 MONTPELIER CAPITAL ADVISORS, LTD.
008 B000002 S
008 C000002 801-00000
008 D010002 HAMILTON
008 D050002 BERMUDA
010 A000001 PIONEER INVESTMENT MANAGEMENT, INC.
010 B000001 801-8255
010 C010001 BOSTON
010 C020001 MA
010 C030001 02109
010 A000002 BROWN BROTHERS HARRIMAN & CO.
010 C010002 BOSTON
010 C020002 MA
      PAGE  2
010 C030002 02109
011 A000001 MERRILL LYNCH & CO.
011 B000001 8-7221
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10281
011 C040001 1201
011 A000002 UBS INVESTMENT BANK
011 B000002 8-022651
011 C010002 STAMFORD
011 C020002 CT
011 C030002 06901
011 A000003 RBC CAPITAL MARKETS CORP.
011 B000003 8-045411
011 C010003 MINNEAPOLIS
011 C020003 MN
011 C030003 55402
011 C040003 4422
011 A000004 ROBERT W. BAIRD & CO.
011 B000004 8-00497
011 C010004 MILWAUKEE
011 C020004 WI
011 C030004 53201
011 C040004 0672
011 A000005 JANNEY MONTGOMERY SCOTT, LLC
011 B000005 8-462
011 C010005 PHILADELPHIA
011 C020005 PA
011 C030005 19103
011 C040005 1675
011 A000006 FERRIS, BAKER WATTS, INC.
011 B000006 8-00000
011 C010006 WASHINGTON
011 C020006 DC
011 C030006 20006
011 A000007 MORGAN KEEGAN & CO., INC.
011 B000007 8-15001
011 C010007 MEMPHIS
011 C020007 TN
011 C030007 38103
012 A000001 PIONEER INVEST. MGT. SHAREHOLDER SVCS., INC.
012 B000001 85-1359
012 C010001 BOSTON
012 C020001 MA
012 C030001 02109
012 A000002 AMERICAN STOCK TRANSFER & TRUST CO.
012 B000002 85-00000
012 C010002 BROOKLYN
012 C020002 NY
012 C030002 11219
013 A000001 ERNST & YOUNG, LLP
      PAGE  3
013 B010001 BOSTON
013 B020001 MA
013 B030001 02116
013 B040001 5072
015 A000001 BROWN BROTHER HARRIMAN & CO.
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02109
015 E010001 X
015 A000002 CITIBANK, N.A., BUENOS AIRES BRANCH
015 B000002 S
015 C010002 BUENOS AIRES
015 D010002 ARGENTINA
015 E040002 X
015 A000003 HSBC BANK AUSTRALIA LIMITED
015 B000003 S
015 C010003 SYDNEY
015 D010003 AUSTRALIA
015 E040003 X
015 A000004 UNICREDIT BANK AUSTRIA AG
015 B000004 S
015 C010004 VIENNA
015 D010004 AUSTRIA
015 E040004 X
015 A000005 BNP PARIBAS SECURITIES SERVICES
015 B000005 S
015 C010005 PANTIN
015 D010005 BELGIUM
015 E040005 X
015 A000006 EUROCLEAR BANK SA NV
015 B000006 S
015 C010006 BRUSSELS
015 D010006 BELGIUM
015 E040006 X
015 A000007 STANDARD CHARTERED BANK,BANGLADESH BRANCH
015 B000007 S
015 C010007 DHAKA
015 D010007 BANGLADESH
015 E040007 X
015 A000008 CITIBANK, N.A., SAO PAULO BRANCH
015 B000008 S
015 C010008 SAO PAULO
015 D010008 BRAZIL
015 E040008 X
015 A000009 ING BANK, N.V., SOFIA BRANCH
015 B000009 S
015 C010009 SOFIA
015 D010009 BULGARIA
015 E040009 X
015 A000010 RBC INVESTOR SERVICES TRUST
      PAGE  4
015 B000010 S
015 C010010 TORONTO
015 D010010 CANADA
015 E040010 X
015 A000011 BANCO DE CHILE
015 B000011 S
015 C010011 SANTIAGO
015 D010011 CHILE
015 E040011 X
015 A000012 STANDARD CHARTERED BANK (CHINA) LIMITED
015 B000012 S
015 C010012 SHANGHAI
015 D010012 CHINA
015 E040012 X
015 A000013 CITITRUST COLOMBIA S.A., SOCIEDAD FIDUCIARA
015 B000013 S
015 C010013 BOGOTA
015 D010013 COLOMBIA
015 E040013 X
015 A000014 UNICREDIT BANK AUSTRIA AG
015 B000014 S
015 C010014 VIENNA
015 D010014 CROATIA
015 E040014 X
015 A000015 CITIBANK EUROPE PLC, ORGANIZACNI SLOZKA
015 B000015 S
015 C010015 PRAGUE
015 D010015 CZECH REPUBLIC
015 E040015 X
015 A000016 DANSKE BANK A/S
015 B000016 S
015 C010016 COPENHAGEN
015 D010016 DENMARK
015 E040016 X
015 A000017 SKANDINAVISKA ENSKILDA BANKEN AB (PUBL)
015 B000017 S
015 C010017 COPENHAGEN
015 D010017 DENMARK
015 E040017 X
015 A000018 CITIBANK N.A., CAIRO BRANCH
015 B000018 S
015 C010018 CAIRO
015 D010018 EGYPT
015 E040018 X
015 A000019 NORDEA BANK FINLAND PLC
015 B000019 S
015 C010019 HELSINKI
015 D010019 FINLAND
015 E040019 X
015 A000020 BNP PARIBAS SECURITIES SERVICES
015 B000020 S
      PAGE  5
015 C010020 PANTIN
015 D010020 FRANCE
015 E040020 X
015 A000021 BNP PARIBAS SECURITIES SERVICES, FRANKFURT BR
015 B000021 S
015 C010021 FRANKFURT
015 D010021 GERMANY
015 E040021 X
015 A000022 HSBC BANK PLC, ATHENS BRANCH
015 B000022 S
015 C010022 ATHENS
015 D010022 GREECE
015 E040022 X
015 A000023 STANDARD CHARTERED BANK GHANA LTD.
015 B000023 S
015 C010023 ACCRA
015 D010023 GHANA
015 E040023 X
015 A000024 STANDARD CHARTERED BANK (HONG KONG) LIMITED
015 B000024 S
015 C010024 KWUN TONG
015 D010024 HONG KONG
015 E040024 X
015 A000025 CITIBANK EUROPE PLC, HUNGARIAN BRANCH
015 B000025 S
015 C010025 BUDAPEST
015 D010025 HUNGARY
015 E040025 X
015 A000026 CITIBANK, N.A.-MUMBAI BRANCH
015 B000026 S
015 C010026 MUMBAI
015 D010026 INDIA
015 E040026 X
015 A000027 CITIBANK, N.A., JAKARTA BRANCH
015 B000027 S
015 C010027 JAKARTA
015 D010027 INDONESIA
015 E040027 X
015 A000028 CITIBANK, N.A., LONDON BRANCH
015 B000028 S
015 C010028 LONDON
015 D010028 IRELAND
015 E040028 X
015 A000029 BANK HAPOALIM BM
015 B000029 S
015 C010029 TEL AVIV
015 D010029 ISRAEL
015 E040029 X
015 A000030 BMP PARIBAS SECURITIES SERVICES, MILAN BRANCH
015 B000030 S
015 C010030 MILAN
      PAGE  6
015 D010030 ITALY
015 E040030 X
015 A000031 SUMITOMO MITSU BANKING CORPORATION
015 B000031 S
015 C010031 TOKYO
015 D010031 JAPAN
015 E040031 X
015 A000032 HSBC BANK MIDDLE EAST LIMITED, JORDAN BRANCH
015 B000032 S
015 C010032 AMMAN
015 D010032 JORDAN
015 E040032 X
015 A000033 CFC STANBIC BANK LIMITED
015 B000033 S
015 C010033 NAIROBI
015 D010033 KENYA
015 E040033 X
015 A000034 HSBC BANK MIDDLE EAST LIMITED, KUWAIT BRANCH
015 B000034 S
015 C010034 SAFAT
015 D010034 KUWAIT
015 E040034 X
015 A000035 KBL EUROPEAN PRIVATE BANKERS SA
015 B000035 S
015 C010035 LUXEMBOURG
015 D010035 LUXEMBOURG
015 E040035 X
015 A000036 HSBC BANK MALAYSIA BERHAD
015 B000036 S
015 C010036 KUALA LUMPUR
015 D010036 MALAYSIA
015 E040036 X
015 A000037 BANCO NACIONAL DE MEXICO, S.A. (BANAMEX)
015 B000037 S
015 C010037 MEXICO CITY
015 D010037 MEXICO
015 E040037 X
015 A000038 CITIBANK MAGHREB
015 B000038 S
015 C010038 CASABLANCA
015 D010038 MOROCCO
015 E040038 X
015 A000039 BNP PARIBAS SECURITIES SERVICES
015 B000039 S
015 C010039 PARIS
015 D010039 FRANCE
015 E040039 X
015 A000040 HSBC LIMITED, NEW ZEALAND BRANCH
015 B000040 S
015 C010040 AUCKLAND
015 D010040 NEW ZEALAND
      PAGE  7
015 E040040 X
015 A000041 STANBIC IBTC BANK PLC
015 B000041 S
015 C010041 LAGOS
015 D010041 NIGERIA
015 E040041 X
015 A000042 NORDEA BANK NORGE ASA
015 B000042 S
015 C010042 OSLO
015 D010042 NORWAY
015 E040042 X
015 A000043 CITIBANK DEL PERU S.A.
015 B000043 S
015 C010043 LIMA
015 D010043 PERU
015 E040043 X
015 A000044 THE HONG KONG & SHANGHAI BANKING CORP LTD(PH)
015 B000044 S
015 C010044 TAGUIG
015 D010044 PHILIPPINES
015 E040044 X
015 A000045 BANK HANDLOWY W WARSZAWIE SA
015 B000045 S
015 C010045 WARSAW
015 D010045 POLAND
015 E040045 X
015 A000046 BNP PARIBAS SECURITIES SERVICES
015 B000046 S
015 C010046 PANTIN
015 D010046 PORTUGAL
015 E040046 X
015 A000047 ING BANK N.V., BUCHAREST BRANCH
015 B000047 S
015 C010047 BUCHAREST
015 D010047 ROMANIA
015 E040047 X
015 A000048 ZAO CITIBANK
015 B000048 S
015 C010048 MOSCOW
015 D010048 RUSSIA
015 E040048 X
015 A000049 HSBC BANK MIDDLE EAST LIMITED, QATAR BRANCH
015 B000049 S
015 C010049 JERSEY
015 D010049 QATAR
015 E040049 X
015 A000050 HSBC SAUDI ARABIA LIMITED
015 B000050 S
015 C010050 RIYADH
015 D010050 SAUDI ARABIA
015 E040050 X
      PAGE  8
015 A000051 STANDARD CHARTERED BANK SINGAPORE BRANCH
015 B000051 S
015 C010051 SINGAPORE
015 D010051 SINGAPORE
015 E040051 X
015 A000052 ING BANK IV, BRATISLAVA BRANCH
015 B000052 S
015 C010052 BRATSLAVA
015 D010052 SLOVAKIA
015 E040052 X
015 A000053 STANDARD BANK OF SOUTH AFRICA LIMITED
015 B000053 S
015 C010053 JOHANNESBURG
015 D010053 SOUTH AFRICA
015 E040053 X
015 A000054 CITIBANK KOREA INC
015 B000054 S
015 C010054 SEOUL
015 D010054 SOUTH KOREA
015 E040054 X
015 A000055 BANCO BILBAO VIZCAYA ARGENTARIA SA
015 B000055 S
015 C010055 MADRID
015 D010055 SPAIN
015 E040055 X
015 A000056 HSBC,SRI LANKA BRANCH
015 B000056 S
015 C010056 COLOMBO
015 D010056 SRI LANKA
015 E040056 X
015 A000057 SKANDINAVISKA ENSKILDA BANKEN AB (PUBL)
015 B000057 S
015 C010057 STOCKHOLM
015 D010057 SWEDEN
015 E040057 X
015 A000058 CREDIT SUISSE AG
015 B000058 S
015 C010058 ZURICH
015 D010058 SWITZERLAND
015 E040058 X
015 A000059 BANK OF TAIWAN
015 B000059 S
015 C010059 TAIPEI
015 D010059 TAIWAN
015 E040059 X
015 A000060 THE HONG KONG &SHANGHAI BANKING CORP LTD,(TH)
015 B000060 S
015 C010060 BANGKOK
015 D010060 THAILAND
015 E040060 X
015 A000061 CITIBANK ANONIM SIRKETI
      PAGE  9
015 B000061 S
015 C010061 ISTANBUL
015 D010061 TURKEY
015 E040061 X
015 A000062 HSBC BANK MIDDLE EAST LIMITED
015 B000062 S
015 C010062 DUBAI
015 D010062 UNITED ARAB EMIRATES
015 E040062 X
015 A000063 HSBC BANK PLC
015 B000063 S
015 C010063 LONDON
015 D010063 UNITED KINGDOM
015 E040063 X
015 A000064 CITIBANK, N.A., CARACAS BRANCH
015 B000064 S
015 C010064 CARACAS
015 D010064 VENEZUELA
015 E040064 X
015 A000065 HSBC BANK (VIETNAM) LTD
015 B000065 S
015 C010065 HO CHI MINH CITY
015 D010065 VIETNAM
015 E040065 X
018  000000 Y
019 A000000 Y
019 B000000   57
019 C000000 PIONEERFDS
020 C000001      0
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        0
022 A000001 J.P. MORGAN SECURITIES LLC
022 B000001 13-3299429
022 C000001    434507
022 D000001      5306
022 A000002 SCOTIA CAPITAL (USA) INC.
022 B000002 13-5239583
022 C000002    115093
022 D000002         0
022 A000003 DEUTSCHE BANK SECURITIES INC.
022 B000003 13-2730828
022 C000003    106180
022 D000003         0
      PAGE  10
022 A000004 ALLIANCEBERNSTEIN INVESTMENTS, INC.
022 B000004 13-3191825
022 C000004      7003
022 D000004     18030
022 A000005 BNY MELLON CAPITAL MARKETS, LLC
022 B000005 23-2384977
022 C000005     12685
022 D000005      1159
022 A000006 GOLDMAN, SACHS & CO.
022 B000006 13-5108880
022 C000006     11334
022 D000006       505
022 A000007 CREDIT SUISSE SECURITIES (USA) LLC
022 B000007 05-0546650
022 C000007      7602
022 D000007      1422
022 A000008 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000008 13-5674085
022 C000008      6051
022 D000008      1846
022 A000009 CITIGROUP GLOBAL MARKETS INC.
022 B000009 11-2418191
022 C000009      6038
022 D000009       349
022 A000010 RBC CAPITAL MARKETS, LLC
022 B000010 41-1228350
022 C000010      4588
022 D000010      1545
023 C000000     732331
023 D000000      32932
024  000000 Y
025 A000001 JANUS CAPITAL GROUP, INC.
025 B000001 43-1804048
025 C000001 D
025 D000001     683
025 A000002 GOLDMAN SACHS CAPITAL II
025 B000002 20-6109939
025 C000002 D
025 D000002     384
025 D000003       0
025 D000004       0
025 D000005       0
025 D000006       0
025 D000007       0
025 D000008       0
026 A000000 Y
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
      PAGE  11
026 G010000 N
026 G020000 Y
026 H000000 N
027  000000 N
028 A010000         0
028 A020000         0
028 A030000         0
028 A040000         0
028 B010000         0
028 B020000         0
028 B030000         0
028 B040000         0
028 C010000         0
028 C020000         0
028 C030000         0
028 C040000         0
028 D010000         0
028 D020000         0
028 D030000         0
028 D040000         0
028 E010000         0
028 E020000         0
028 E030000         0
028 E040000         0
028 F010000         0
028 F020000         0
028 F030000         0
028 F040000         0
028 G010000         0
028 G020000         0
028 G030000         0
028 G040000         0
028 H000000         0
030 A000000      0
030 B000000  0.00
030 C000000  0.00
031 A000000      0
031 B000000      0
032  000000      0
033  000000      0
035  000000      0
036 B000000      0
038  000000      0
042 A000000   0
042 B000000   0
042 C000000   0
042 D000000   0
042 E000000   0
042 F000000   0
042 G000000   0
042 H000000   0
      PAGE  12
043  000000      0
044  000000      0
045  000000 Y
046  000000 N
047  000000 Y
048  000000  0.850
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 Y
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 N
      PAGE  13
057  000000 N
058 A000000 N
059  000000 Y
060 A000000 Y
060 B000000 Y
061  000000        0
062 A000000 Y
062 B000000   0.0
062 C000000   0.0
062 D000000   2.2
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  99.9
062 Q000000  37.5
062 R000000   0.0
063 A000000   0
063 B000000  5.0
064 A000000 N
064 B000000 Y
065  000000 N
066 A000000 N
067  000000 N
068 A000000 N
068 B000000 N
069  000000 N
070 A010000 Y
070 A020000 Y
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
      PAGE  14
070 I020000 N
070 J010000 Y
070 J020000 Y
070 K010000 Y
070 K020000 Y
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000     90922
071 B000000     75825
071 C000000    226005
071 D000000   34
072 A000000 12
072 B000000    21254
072 C000000      120
072 D000000        0
072 E000000      390
072 F000000     1985
072 G000000      151
072 H000000        0
072 I000000       17
072 J000000       33
072 K000000        0
072 L000000       26
072 M000000        7
072 N000000       12
072 O000000        0
072 P000000      785
072 Q000000        0
072 R000000       55
072 S000000       46
072 T000000        0
072 U000000        0
072 V000000        0
072 W000000      120
072 X000000     3237
072 Y000000        0
072 Z000000    18527
072AA000000      334
072BB000000        0
      PAGE  15
072CC010000     7933
072CC020000        0
072DD010000    16885
072DD020000        0
072EE000000        0
073 A010000   2.0400
073 A020000   0.0000
073 B000000   0.0000
073 C000000   0.0000
074 A000000        0
074 B000000     3850
074 C000000        0
074 D000000   229937
074 E000000     3800
074 F000000     1943
074 G000000        0
074 H000000        0
074 I000000       10
074 J000000     1610
074 K000000        0
074 L000000     4151
074 M000000      789
074 N000000   246090
074 O000000     3526
074 P000000      184
074 Q000000    69000
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000     1734
074 S000000        0
074 T000000   171646
074 U010000     8291
074 U020000        0
074 V010000    20.70
074 V020000     0.00
074 W000000   0.0000
074 X000000     3540
074 Y000000        0
075 A000000        0
075 B000000   164880
076  000000    21.82
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
      PAGE  16
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078  000000 N
080 A000000 ICI MUTUAL INSURANCE COMPANY
080 C000000    45000
081 A000000 Y
081 B000000  57
082 A000000 N
082 B000000        0
083 A000000 N
083 B000000        0
084 A000000 N
084 B000000        0
085 A000000 N
085 B000000 N
086 A010000     30
086 A020000    592
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
087 A010000 COMMON STOCK
087 A020000 723653101
087 A030000 HNW
088 A000000 Y
088 B000000 N
088 C000000 N
088 D000000 N
SIGNATURE   MARK BRADLEY
TITLE       TREASURER