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

Investment Company Act file number: 811-7590

John Hancock Patriot Preferred Dividend Fund
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  (Exact name of registrant as specified in charter)

601 Congress Street
Boston, Massachusetts 02210-2805
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  (Address of principal executive offices)

Noel Maffucci
601 Congress Street
Boston, Massachusetts 02210-2805
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  (Name and address of agent for service)


Registrant's telephone number, including area code: 1-800-225-5291

Date of Fiscal year-end: 6/30/2006

Date of reporting period: 07/01/2005 - 06/30/2006

Item 1. Proxy Voting Record

PATRIOT PREFERRED DIVIDEND


ALLIANT ENERGY CORP.

Ticker:       LNT            Security ID:  018802108
Meeting Date: MAY 12, 2006   Meeting Type: Annual
Record Date:  MAR 20, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Ann K. Newhall             For       For        Management
1.2   Elect Director Dean C. Oestreich          For       For        Management
1.3   Elect Director Carol P. Sanders           For       For        Management
2     Amend Omnibus Stock Plan                  For       Abstain    Management
3     Ratify Auditors                           For       For        Management


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AMERCO

Ticker:       UHAL           Security ID:  023586100
Meeting Date: AUG 26, 2005   Meeting Type: A
Record Date:  JUL 7, 2005

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.01  Elect Daniel R. Mullen                    For       For        Management
1.02  Elect John M. Dodds                       For       For        Management
1.03  Elect James P. Shoen                      For       For        Management


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AT&T INC

Ticker:       T              Security ID:  00206R102
Meeting Date: APR 28, 2006   Meeting Type: Annual
Record Date:  MAR 1, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director William F. Aldinger, III   For       Withhold   Management
1.2   Elect Director Gilbert F. Amelio          For       For        Management
1.3   Elect Director August A. Busch, III       For       For        Management
1.4   Elect Director Martin K. Eby, Jr.         For       For        Management
1.5   Elect Director James A. Henderson         For       For        Management
1.6   Elect Director Charles F. Knight          For       For        Management
1.7   Elect Director Jon C. Madonna             For       For        Management
1.8   Elect Director Lynn M. Martin             For       For        Management
1.9   Elect Director John B. McCoy              For       For        Management
1.10  Elect Director Mary S. Metz               For       For        Management
1.11  Elect Director Toni Rembe                 For       For        Management
1.12  Elect Director S. Donley Ritchey          For       For        Management
1.13  Elect Director Joyce M. Roche             For       For        Management
1.14  Elect Director Randall L. Stephenson      For       For        Management
1.15  Elect Director Laura D'Andrea Tyson       For       For        Management
1.16  Elect Director Patricia P. Upton          For       For        Management
1.17  Elect Director Edward E. Whitacre, Jr.    For       For        Management
2     Ratify Auditors                           For       For        Management
3     Approve Omnibus Stock Plan                For       Against    Management
4     Amend Articles/Bylaws/Charter-Non-Routine For       For        Management
5     Report on Political Contributions         Against   Abstain    Shareholder
6     Separate Chairman and CEO Positions       Against   Against    Shareholder
7     Report on Pay Disparity                   Against   Against    Shareholder
8     Non-Employee Director Compensation        Against   Against    Shareholder
9     Submit Severance Agreement (Change in     Against   Against    Shareholder
      Control) to shareholder Vote
10    Adopt Simple Majority Vote Requirement    Against   For        Shareholder


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DOMINION RESOURCES, INC.

Ticker:       D              Security ID:  25746U109
Meeting Date: APR 28, 2006   Meeting Type: Annual
Record Date:  FEB 24, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Peter W. Brown             For       For        Management
1.2   Elect Director Ronald J. Calise           For       For        Management
1.3   Elect Director Thos. E. Capps             For       For        Management
1.4   Elect Director George A. Davidson, Jr.    For       For        Management
1.5   Elect Director Thomas F. Farrell, II      For       For        Management
1.6   Elect Director John W. Harris             For       For        Management
1.7   Elect Director Robert S. Jepson, Jr.      For       For        Management
1.8   Elect Director Mark J. Kington            For       For        Management
1.9   Elect Director Benjamin J. Lambert, III   For       For        Management
1.10  Elect Director Richard L. Leatherwood     For       For        Management
1.11  Elect Director Margaret A. McKenna        For       For        Management
1.12  Elect Director Frank S. Royal, M.D.       For       For        Management
1.13  Elect Director S. Dallas Simmons          For       For        Management
1.14  Elect Director David A. Wollard           For       For        Management
2     Ratify Auditors                           For       For        Management
3     Require a Majority Vote for the Election  Against   Against    Shareholder
      of Directors
4     Report on Greenhouse Gas Emissions        Against   Abstain    Shareholder
5     Submit Supplemental Executive Retirement  Against   For        Shareholder
      Plans to Shareholder vote


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DTE ENERGY CO.

Ticker:       DTE            Security ID:  233331107
Meeting Date: APR 27, 2006   Meeting Type: Annual
Record Date:  FEB 27, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Alfred R. Glancy, III      For       For        Management
1.2   Elect Director John E. Lobbia             For       For        Management
1.3   Elect Director Eugene A. Miller           For       For        Management
1.4   Elect Director Charles W. Pryor, Jr.      For       For        Management
1.5   Elect Director Joe W. Laymon              For       For        Management
2     Approve Omnibus Stock Plan                For       For        Management
3     Ratify Auditors                           For       For        Management


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NISOURCE INC.

Ticker:       NI             Security ID:  65473P105
Meeting Date: MAY 10, 2006   Meeting Type: Annual
Record Date:  MAR 14, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Gary L. Neale              For       For        Management
1.2   Elect Director Robert J. Welsh            For       For        Management
1.3   Elect Director Roger A. Young             For       For        Management
2     Ratify Auditors                           For       For        Management
3     Declassify the Board of Directors         For       For        Management
4     Require a Majority Vote for the Election  Against   For        Shareholder
      of Directors


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NSTAR

Ticker:       NST            Security ID:  67019E107
Meeting Date: MAY 4, 2006    Meeting Type: Annual
Record Date:  MAR 6, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Thomas G. Dignan, Jr.      For       For        Management
1.2   Elect Director Matina S. Horner           For       For        Management
1.3   Elect Director Gerald L. Wilson           For       For        Management
2     Ratify Auditors                           For       For        Management


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PEOPLES ENERGY CORP.

Ticker:       PGL            Security ID:  711030106
Meeting Date: FEB 24, 2006   Meeting Type: Annual
Record Date:  DEC 27, 2005

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect  Director Keith E. Bailey           For       For        Management
1.2   Elect  Director James R. Boris            For       For        Management
1.3   Elect  Director William J. Brodsky        For       For        Management
1.4   Elect  Director Pastora San Juan Cafferty For       For        Management
1.5   Elect  Director Diana S. Ferguson         For       For        Management
1.6   Elect  Director John W. Higgins           For       For        Management
1.7   Elect  Director Dipak C. Jain             For       For        Management
1.8   Elect  Director Michael E. Lavin          For       For        Management
1.9   Elect  Director Homer J. Livingston       For       For        Management
1.10  Elect  Director Thomas M. Patrick         For       For        Management
1.11  Elect  Director Richard P. Toft           For       For        Management
2     Ratify Auditors                           For       For        Management


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SCANA CORPORATION

Ticker:       SCG            Security ID:  80589M102
Meeting Date: APR 27, 2006   Meeting Type: Annual
Record Date:  MAR 10, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director James A. Bennett           For       For        Management
1.2   Elect Director William C. Burkhardt       For       For        Management
1.3   Elect Director Lynne M. Miller            For       For        Management
1.4   Elect Director Maceo K. Sloan             For       For        Management
1.5   Elect Director Sharon A. Decker           For       For        Management
2     Ratify Auditors                           For       For        Management


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TECO ENERGY, INC.

Ticker:       TE             Security ID:  872375100
Meeting Date: APR 26, 2006   Meeting Type: Annual
Record Date:  FEB 16, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Sara L. Baldwin            For       For        Management
1.2   Elect Director Luis Guinot, Jr.           For       For        Management
1.3   Elect Director Sherrill W. Hudson         For       For        Management
1.4   Elect Director Loretta A. Penn            For       For        Management
1.5   Elect Director William P. Sovey           For       For        Management
2     Ratify Auditors                           For       For        Management


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XCEL ENERGY INC.

Ticker:       XEL            Security ID:  98389B100
Meeting Date: MAY 17, 2006   Meeting Type: Annual
Record Date:  MAR 21, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director C. Coney Burgess           For       For        Management
1.2   Elect Director Fredric W. Corrigan        For       For        Management
1.3   Elect Director Richard K. Davis           For       For        Management
1.4   Elect Director Roger R. Hemminghaus       For       For        Management
1.5   Elect Director A. Barry Hirschfeld        For       For        Management
1.6   Elect Director Richard C. Kelly           For       For        Management
1.7   Elect Director Douglas W. Leatherdale     For       For        Management
1.8   Elect Director Albert F. Moreno           For       For        Management
1.9   Elect Director Dr. Margaret R. Preska     For       For        Management
1.10  Elect Director A. Patricia Sampson        For       For        Management
1.11  Elect Director Richard H. Truly           For       For        Management
2     Ratify Auditors                           For       For        Management
3     Separate Chairman and CEO Positions       Against   Against    Shareholder



Any ballot marked  'Abstain' is considered  to have been voted.  Ballots  marked
'Abstain'  are   considered   to  be  have  been  voted   against   management's
recommendation,  regardless of whether the recommendation is 'For' or 'Against,'
except where  management  has made no  recommendation  or has  recommended  that
shareholders 'Abstain.'

Where  management has recommended that  shareholders  'Abstain' from voting on a
ballot item: 1) a ballot  market  'Abstain' is considered to have been voted for
management's  recommendation  to  'Abstain'  and  2) a  ballot  voted  'For"  or
'Against' is considered to have been voted against  management's  recommendation
to 'Abstain.'

Where management has made no  recommendation  on a ballot item, the abbreviation
"N/A" is used to denote that there is no applicable  recommendation  compared to
which a vote may be 'For' or 'Against' the recommendation of management.

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.

John Hancock Patriot Preferred Dividend Fund
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       (Registrant)

By:    /s/Keith F. Hartstein
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       Keith F. Hartstein
       President and Chief Executive Officer

Date:  August 30, 2006