UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-PX
               ANNUAL REPORT OF PROXY VOTING RECORD OF REGISTERED
                         MANAGEMENT INVESTMENT COMPANIES

                  Investment Company Act file number 811-22014
                                      -----

Pioneer Diversified High Income Trust
----------------------------------------------------
(Exact name of registrant as specified in charter)

60 State Street Boston, MA  02109
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(Address of principal executive offices)

Dorothy Bourassa
60 State Street
Boston, MA  02109
----------------------------------------------------
(Name and address of agent for service)

Registrant's telephone number, including area code:  (617) 742-7825

Date of fiscal year end:  March 31

Date of reporting period:  July 1, 2008 to June 30, 2009

SIGNATURES

Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

(Registrant)  Pioneer Diversified High Income Trust

By (Signature and Title) /s/ John F. Cogan, Jr.
                         -------------------------
                         John F. Cogan, Jr., Chairman and President

Date  August 19, 2009
      ----------------


===================PIONEER DIVERSIFIED HIGH INCOME TRUST =======================


AINSWORTH LUMBER CO LTD

Ticker:       ANS            Security ID:  009037AG7
Meeting Date: JUL 24, 2008   Meeting Type: Bondholder
Record Date:  JUN 18, 2008

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Bondholder Resolution: Approve          For       For          Management
      Arrangement Scheme


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AINSWORTH LUMBER CO LTD

Ticker:       ANS            Security ID:  C01023206
Meeting Date: MAY 13, 2009   Meeting Type: Annual/Special
Record Date:  APR 3, 2009

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Robert Chadwick          For       For          Management
1.2   Elect Director Jay Gurandiano           For       For          Management
1.3   Elect Director Paul Houston             For       For          Management
1.4   Elect Director Richard Huff             For       For          Management
1.5   Elect Director John Lacey               For       Withhold     Management
1.6   Elect Director Gordon Lancaster         For       For          Management
1.7   Elect Director Jonathan I. Mishkin      For       For          Management
2     Approve Deloitte & Touche LLP as        For       For          Management
      Auditors and Authorize Board to Fix
      Their Remuneration
3     Approve Stock Option Plan               For       For          Management


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BULGARIA STEEL FINANCE BV

Ticker:                      Security ID:  N1759JAA2
Meeting Date: OCT 1, 2008    Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Bondholder Proposal                     For       For          Management


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CHARTER COMMUNICATIONS, INC.

Ticker:       CHTRQ          Security ID:  12502BAC7
Meeting Date: JUN 15, 2009   Meeting Type: Written Consent
Record Date:  APR 17, 2009

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Plan Of Reorganization                  For       For          Management


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CHARTER COMMUNICATIONS, INC.

Ticker:       CHTRQ          Security ID:  12502CAM3
Meeting Date: JUN 15, 2009   Meeting Type: Written Consent
Record Date:  APR 17, 2009

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Plan Of Reorganization                  For       For          Management


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NEXUS FLOATING PRODUCTION LTD.

Ticker:                      Security ID:  Y6265HAA0
Meeting Date: JUN 17, 2009   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons                         For       Did Not Vote Management
2     Approve Agenda                          For       Did Not Vote Management
3     Approve Election of Two Bondholders to  For       Did Not Vote Management
      Sign the Minutes Together with
      Chairperson
4     Approve Change of Loan Agreement        For       Did Not Vote Management


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NORWEGIAN ENERGY COMPANY ASA

Ticker:                      Security ID:  R6333ZAA6
Meeting Date: NOV 3, 2008    Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Convocation of Meeting          None      For          Management
2     Approve Agenda                          None      For          Management
3     Designate Inspector(s) of Minutes of    None      For          Management
      Meeting
4     Amend Loan Agreement: Delete Clause     For       For          Management
      13.3(c) from the Loan Agreement; Amend
      Repayment Schedule


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NORWEGIAN ENERGY COMPANY ASA

Ticker:                      Security ID:  R6333ZAA6
Meeting Date: MAR 20, 2009   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons of Meeting              For       For          Management
2     Approve and Agenda                      For       For          Management
3     Designate Inspector(s) of Minutes of    For       For          Management
      Meeting
4     Approve Amendment to Bond Agreement;    For       For          Management
      Revise Amortization, Revise Option
      Schedules, New Share Pledge, Revise
      Price Hedging, Revise Exploration
      Restriction; Authorize Formalities


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PETROMENA ASA

Ticker:                      Security ID:  R69629AA2
Meeting Date: JAN 16, 2009   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons                         For       Did Not Vote Management
2     Approve Agenda                          For       Did Not Vote Management
3     Elect Two Persons to Sign Minutes       For       Did Not Vote Management
      Together with Chairman
4     Consent to Partial Redemption and       For       Did Not Vote Management
      Release of Security


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PETROMENA ASA

Ticker:                      Security ID:  R69629AA2
Meeting Date: FEB 18, 2009   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons                         None      For          Management
3     Approve Agenda                          None      For          Management
4     Elect Two Persons to Sign Minutes       None      For          Management
      Together with Chairman
5     Consent to Engagement of Financial      None      For          Management
      Advisor; Consent to Engagement of Rig
      Broker; Consent to Pay Certain Fees and
      Legal Expenses to Trustee, Rig Broker,
      Legal Advisor and Financial Advisor


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PETROMENA ASA

Ticker:                      Security ID:  R69629AA2
Meeting Date: MAR 11, 2009   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons                         For       For          Management
2     Approve Agenda                          For       For          Management
3     Designate Inspector(s) of Minutes of    For       For          Management
      Meeting
4     Amend Bond Loan Agreement: Sale of Rig, For       For          Management
      Etc.
5     Amend Bond Loan Agreement: Increase     For       For          Management
      Carve-out Amount for First Priority
      Debt Related to Rig 1, Etc
6     Amend Bond Loan Agreement: Increase     For       For          Management
      Carve-out Amount for First Priority
      Debt Related to Rig 1, Etc


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PETROMENA ASA

Ticker:                      Security ID:  R69629AA2
Meeting Date: MAR 30, 2009   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons                         For       For          Management
2     Approve Agenda                          For       For          Management
3     Designate Inspector(s) of Minutes of    For       For          Management
      Meeting
4a    Authorize Norsk Tillitsmann to Enter    For       For          Management
      Into an Egagement Letter with AMA
      Capital Partners as a Financial
      Supervisor
4b    Authorize Norsk Tillitsmann to Pay      For       For          Management
      Legal Fees, Costs, and Expenses
      Incurred by Representation of Bingham
      McCutchen LLP as Legal Advisor
4c    Authorize Norsk Tillitsmann to Pay      For       For          Management
      Fees, Cost, and Expenses in Connection
      with the Issue of the 9.75 Percent
      Bonds
4d    Authorize Norsk Tillitsmann to Pay the  For       For          Management
      Fees and Expenses of AMA Capital
      Partners Incurred in its Representation
      of Norsk Tillitsmann


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SKEIE DRILLING & PRODUCTION ASA

Ticker:                      Security ID:  R7034SAB0
Meeting Date: JUN 29, 2009   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons                         For       For          Management
2     Approve Agenda                          For       For          Management
3     Designate Inspectors of Minutes of      For       For          Management
      Meeting
4     Approve Write-off; Approve Partial      For       For          Management
      Foregoing of Interest, Approve Partial
      Conversion; Approve Consent Not to
      Declare Default; Approve Waivers and
      Amendments to Loan Agreement; Authorize
      Trustee to Implement and Make
      Adjustments if Needed

========== END NPX REPORT