a_preferredincomefund.htm

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

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811- 21131

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

601 Congress Street, Boston, Massachusetts 02210
(Address of principal executive offices) (Zip code)

Alfred P. Ouellette, Senior Counsel and Assistant Secretary

601 Congress Street

Boston, Massachusetts 02210

(Name and address of agent for service)

Registrant's telephone number, including area code:  617-663-4324 
Date of fiscal year end:  July 31 

Date of reporting period: April 30, 2007

ITEM 1. SCHEDULE OF INVESTMENTS




John Hancock
Preferred Income Fund
Securities owned by the Fund on

April 30, 2007 (unaudited)

  Interest  Maturity  Credit  Par value   
Issuer, description  rate  date  rating (A)  (000)  Value 
Bonds 2.17%          $19,766,263 

(Cost $19,771,543)           
 
Electric Utilities 1.19%          10,820,412 

Black Hills Corp.,           
Note  6.500%  05-15-13  BBB-  $5,950  6,043,237 
Entergy Gulf States, Inc.,           
1st Mtg Bond  6.200  07-01-33  BBB+  5,000  4,777,175 
 
Gas Utilities 0.98%          8,945,851 

Southern Union Co.,           
Jr Sub Note Ser A (P)  7.200  11-01-66  BB  8,800  8,945,851 
   
      Credit  Par value   
Issuer, description, maturity date      rating (A)  (000)  Value 
Capital preferred securities 6.89%          $62,760,978 

(Cost $55,465,089)           
  
Diversified Banks 0.83%          7,527,450 

Lloyds TSB Bank Plc, 6.90%, 11-29-49 (United           
Kingdom)      A+  $7,500  7,527,450 
 
Electric Utilities 3.21%          29,220,000 

DPL Capital Trust II, 8.125%, 09-01-31      BB+  24,000  29,220,000 
 
Gas Utilities 2.85%          26,013,528 

KN Capital Trust I, 8.56%, Ser B, 04-15-27      B-  17,500  18,140,360 
KN Capital Trust III, 7.63%, 04-15-28      B-  8,000  7,873,168 
 
Issuer        Shares  Value 
Common stocks 3.23%          $29,450,976 

(Cost $22,962,896)           
 
Electric Utilities 0.48%          4,406,400 

Great Plains Energy, Inc.        135,000  4,406,400 
 
Independent Power Producers & Energy Traders 0.79%          7,213,800 

TXU Corp.        110,000  7,213,800 
 
Integrated Oil & Gas 0.28%          2,508,276 

BP Plc, American Depositary Receipt (ADR)           
(United Kingdom)        37,259  2,508,276 

Page 1


John Hancock
Preferred Income Fund
Securities owned by the Fund on
April 30, 2007 (unaudited)

Multi-Utilities 1.68%        15,322,500 

Alliant Energy Corp.      190,000  8,322,000 
TECO Energy, Inc.      390,000  7,000,500 
 
    Credit     
Issuer, description    rating (A)  Shares  Value 
 
Preferred stocks  84.32%       $768,652,071 

(Cost $763,967,578)         
 
Agricultural Products 1.37%       12,454,413 

Ocean Spray Cranberries, Inc., 6.25%,       
Ser A (S)    BB+  143,000  12,454,413 
 
Automobile Manufacturers 2.03%      18,504,158 

Ford Motor Co., 7.50%    CCC+  40,000  776,400 
General Motors Corp., 7.25%, Ser 04-15-41  B-  378,700  7,373,289 
General Motors Corp., 7.25%, Ser 07-15-41  B-  82,000  1,603,920 
General Motors Corp., 7.25%, Ser 02-15-52  B-  254,300  4,941,049 
General Motors Corp., 7.375%, Ser 05-15-48  Caa1  65,000  1,274,650 
General Motors Corp., 7.375%, Ser 10-01-51  B-  129,000  2,534,850 
 
Broadcasting & Cable TV 2.41%      21,989,100 

Comcast Corp., 7.00%    BBB+  222,000  5,760,900 
Comcast Corp., 7.00%, Ser B  BBB+  629,000  16,228,200 
 
Consumer Finance 4.30%      39,175,279 

Ford Motor Credit Co., 7.60%  B1  315,600  7,041,036 
HSBC Finance Corp., 6.00%  AA-  134,200  3,324,134 
HSBC Finance Corp., 6.36%, Depositary       
Shares, Ser B    A  297,000  7,692,300 
HSBC Finance Corp., 6.875%  AA-  399,800  10,174,910 
SLM Corp., 6.00%    A  194,100  4,142,094 
SLM Corp., 6.97%, Ser A  BBB+  137,390  6,800,805 

Page 2


John Hancock
Preferred Income Fund
Securities owned by the Fund on
April 30, 2007 (unaudited)

Diversified Banks 5.26%      47,903,158 

BAC Capital Trust IV, 5.875%  A+  30,000  716,700 
Bank One Capital Trust VI, 7.20%  A  81,100  2,054,263 
Fleet Capital Trust VIII, 7.20%  A+  464,750  11,800,002 
HSBC Holdings Plc, 6.20%, Ser A (United       
Kingdom)  A  150,000  3,801,000 
Royal Bank of Scotland Group Plc, 5.75%,       
Ser L (United Kingdom)  A  550,900  13,232,618 
Royal Bank of Scotland Group Plc, 6.35%,       
Ser N, ADR (United Kingdom)  A  20,000  507,600 
Santander Finance Preferred SA Unipersonal,       
6.41%, Ser 1 (Spain)  A+  225,000  5,737,500 
USB Capital VIII, 6.35%, Ser 1  A+  169,800  4,239,906 
USB Capital X, 6.50%  A+  45,000  1,137,600 
Wachovia Preferred Funding Corp., 7.25%,       
Ser A  A  69,000  1,931,310 
Wells Fargo Capital Trust IV, 7.00%  AA-  108,100  2,744,659 
 
Electric Utilities 16.08%      146,648,002 

Duquesne Light Co., 6.50%  BB+  73,650  3,697,230 
Entergy Arkansas, Inc., 6.70%  AAA  25,300  637,813 
Entergy Mississippi, Inc., 7.25%  A-  346,000  8,836,840 
FPC Capital I, 7.10%, Ser A  BBB-  844,691  21,488,939 
FPL Group Capital Trust I, 5.875%  BBB+  502,200  12,143,196 
Georgia Power Capital Trust VII, 5.875%  BBB+  250,600  6,001,870 
Georgia Power Co., 6.00%, Ser R  A  395,497  9,883,470 
HECO Capital Trust III, 6.50%  BBB-  375,400  9,613,994 
Interstate Power & Light Co., 8.375%, Ser B  Baa2  700,000  22,968,750 
Northern States Power Co., 8.00%  BBB-  235,000  6,039,500 
NSTAR Electric Co., 4.78%  A-  15,143  1,362,870 
PPL Electric Utilities Corp., 6.25%,       
Depositary Shares  BBB  300,000  7,884,390 
PPL Energy Supply, LLC, 7.00%  BBB  383,660  9,925,284 
Southern California Edison Co., 6.125%  BBB-  119,000  11,870,250 
Southern Co. Capital Trust VI, 7.125%  BBB+  49,800  1,256,952 
Virginia Power Capital Trust, 7.375%  BB+  518,150  13,036,654 
  
Forest Products 0.14%      1,295,225 

ING Groep NV 6.125% (Netherlands)  A  51,500  1,295,225 
 
Gas Utilities 2.22%      20,263,588 

Southern Union Co., 5.00%, Conv  BBB-  25,000  1,399,000 
Southern Union Co., 7.55%, Ser A  BB  296,600  7,637,450 
Southwest Gas Capital II, 7.70%  BB  404,300  10,374,338 
TransCanada Pipelines Ltd., 8.25% (Canada)  BBB  32,800  852,800 
 
Hotels, Resorts & Cruise Lines 0.33%      3,026,903 

Hilton Hotels Corp., 8.00%  BB+  118,100  3,026,903 

Page 3


John Hancock
Preferred Income Fund
Securities owned by the Fund
on
April 30, 2007 (unaudited)

Integrated Telecommunication Services 3.07%      27,950,441 

Telephone & Data Systems, Inc., 6.625%  BB+  233,000  5,710,830 
Telephone & Data Systems, Inc., 7.60%, Ser A  BB+  690,687  17,253,361 
Verizon New England, Inc., 7.00%, Ser B  A3  199,450  4,986,250 
  
Investment Banking & Brokerage 7.95%      72,478,953 

Bear Stearns Capital Trust III, 7.80%  BBB+  40,600  1,047,480 
Goldman Sachs Group, Inc., 6.20%, Ser B  A  460,000  11,803,600 
Lehman Brothers Holdings Capital Trust III,       
6.375%, Ser K  A-  150,000  3,763,500 
Lehman Brothers Holdings, Inc., 5.94%,       
Depositary Shares, Ser C  A-  175,600  8,999,500 
Merrill Lynch Preferred Capital Trust III,       
7.00%  A  330,500  8,391,395 
Merrill Lynch Preferred Capital Trust IV,       
7.12%  A  247,752  6,330,064 
Merrill Lynch Preferred Capital Trust V,       
7.28%  A  367,000  9,435,570 
Morgan Stanley Capital Trust II, 7.25%  A-  240,200  6,029,020 
Morgan Stanley Capital Trust III, 6.25%  A-  192,400  4,773,444 
Morgan Stanley Capital Trust IV, 6.25%  A-  57,000  1,404,480 
Morgan Stanley Capital Trust V, 5.75%  A1  347,000  8,223,900 
Morgan Stanley Capital Trust VI, 6.60%  A-  90,000  2,277,000 
 
Life & Health Insurance 4.73%      43,148,140 

Lincoln National Capital VI, 6.75%, Ser F  A-  165,800  4,189,766 
MetLife, Inc., 6.50%, Ser B  BBB  950,500  25,017,160 
PLC Capital Trust IV, 7.25%  BBB+  186,600  4,709,784 
PLC Capital Trust V, 6.125%  BBB+  256,000  6,223,360 
Prudential Plc, 6.50% (United Kingdom)  A-  117,000  3,008,070 
 
Movies & Entertainment 2.17%      19,822,192 

Viacom Inc., 6.85%  BBB  789,100  19,822,192 
 
Multi-Line Insurance 3.91%      35,649,353 

Aegon NV, 6.375% (Netherlands)  A-  444,900  11,554,053 
Aegon NV, 6.50% (Netherlands)  A-  111,100  2,844,160 
ING Groep NV, 6.20% (Netherlands)  A  134,793  3,388,696 
ING Groep NV, 7.05% (Netherlands)  A  703,800  17,862,444 

Page 4


John Hancock
Preferred Income Fund
Securities owned by the Fund on
April 30, 2007 (unaudited)

Multi-Utilities 7.53%      68,602,859 

Aquila, Inc., 7.875%  B2  511,700  12,992,063 
Baltimore Gas & Electric Co., 6.99%, Ser 1995  Ba1  40,000  4,116,252 
BGE Capital Trust II, 6.20%  BBB-  831,825  20,471,213 
Dominion CNG Capital Trust I, 7.80%  BB+  253,476  6,362,248 
DTE Energy Trust I, 7.80%  BB+  135,100  3,401,818 
PNM Resources, Inc., 6.75%, Conv  BBB-  268,000  14,600,640 
PSEG Funding Trust II, 8.75%  BB+  233,500  6,000,950 
Public Service Electric & Gas Co., 4.18%,       
Ser B  BB+  7,900  657,675 
 
Oil & Gas Exploration & Production 3.66%      33,324,610 

Chesapeake Energy Corp., 6.25%, Conv (G)  B+  4,530  1,232,160 
Nexen, Inc., 7.35% (Canada)  BB+  1,261,000  32,092,450 
  
Other Diversified Financial Services 7.34%      66,895,923 

ABN AMRO Capital Funding Trust V, 5.90%  A  626,100  15,114,054 
ABN AMRO Capital Funding Trust VII, 6.08%  A  328,000  8,160,640 
Citigroup Capital VII, 7.125%  A+  138,700  3,525,754 
Citigroup Capital VIII, 6.95%  A+  410,600  10,388,180 
Citigroup Capital X, 6.10%  A+  40,000  994,000 
Citigroup Capital XI, 6.00%  A+  25,000  613,500 
DB Capital Funding VIII, 6.375%  A  222,000  5,683,200 
JPMorgan Chase Capital X, 7.00%, Ser J  A  607,100  15,420,340 
JPMorgan Chase Capital XI, 5.875%, Ser K  A  289,700  6,996,255 
  
Real Estate Management & Development 3.88%      35,358,515 

Duke Realty Corp., 6.50%, Depositary Shares,       
Ser K  BBB  110,000  2,777,500 
Duke Realty Corp., 6.60%, Depositary Shares,       
Ser L  BBB  109,840  2,793,231 
Duke Realty Corp., 6.625%, Depositary       
Shares, Ser J  BBB  59,925  1,513,106 
Duke Realty Corp., 7.99%, Depositary Shares,       
Ser B  BBB  251,830  12,567,904 
Public Storage, Inc., 6.45%, Depositary       
Shares, Ser X  BBB+  25,000  619,500 
Public Storage, Inc., 6.50%, Depositary       
Shares, Ser W  BBB+  100,000  2,477,000 
Public Storage, Inc., 7.50%, Depositary       
Shares, Ser V  BBB+  497,643  12,610,274 
  
Regional Banks 2.31%      21,083,088 

KeyCorp Capital VI, 6.125%  BBB  20,900  511,423 
PFGI Capital Corp., 7.75%  A  796,000  20,571,665 

Page 5


John Hancock
Preferred Income Fund
Securities owned by the Fund on
April 30, 2007 (unaudited)

Reinsurance 0.40%          3,630,001 

RenaissanceRe Holdings Ltd., 6.08%, Ser C         
(Bermuda)      BBB  153,100  3,630,001 
 
Specialized Finance 0.48%          4,355,300 

CIT Group, Inc., 6.35%, Ser A      BBB+  70,000  1,819,300 
Repsol International Capital Ltd., 7.45%,           
Ser A (Cayman Islands)      BB+  100,000  2,536,000 
 
Thrifts & Mortgage Finance 1.35%          12,340,400 

Abbey National Plc, 7.375% (United Kingdom)    A+  370,000  9,386,900 
Sovereign Capital Trust V, 7.75%      BB+  110,000  2,953,500 
 
Wireless Telecommunication Services  1.40%          12,752,470 

United States Cellular, 7.50%      BB+  507,460  12,752,470 
  
  Interest  Maturity  Credit  Par value   
Issuer, description  rate  date  rating (A)  (000)  Value 
Short-term investments 3.39%        $30,900,000 

(Cost $30,900,000)           
 
Government U.S. Agency 3.39%          30,900,000 

Federal Home Loan Bank, Disc Note  5.06%  05-01-07  AAA  $30,900  30,900,000 
 
Total investments (Cost $893,067,106)  100.00%        $911,530,288 


Page 6


John Hancock
Preferred Income Fund
Footnotes to Schedule of Investments
April 30, 2007 (unaudited)

(A) Credit ratings are unaudited and are rated by Moody's Investors Service where Standard & Poor's ratings are not available, unless indicated otherwise.

(G) Security rated internally by John Hancock Advisers, LLC.

(P) Represents rate in effect on April 30, 2007.

(S) This security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold, normally to qualified institutional buyers, in transactions exempt from registration. Rule 144A securities amounted to $12,454,413 or 1.37% of the Fund's total investments as of April 30, 2007.

Parenthetical disclosure of a foreign country in the security description represents country of a foreign issuer; however, security is U.S. dollar-denominated.

The percentage shown for each investment category is the total value of that category as a percentage of the total investments of the Fund.

The cost of investments owned on April 30, 2007, including short-term investments, was $893,067,106. Gross unrealized appreciation and depreciation of investments aggregated $35,993,402 and $17,530,220, respectively, resulting in net unrealized appreciation of $18,463,182.

Footnotes to Schedule of Investments - Page 1


John Hancock
Preferred Income Fund
Financial futures contracts
April 30, 2007 (unaudited)

  Number of       
Open contracts  contracts  Position  Expiration  Depreciation 

 
U.S. 10-year Treasury Note  840  Short  June-07  $436,241 

Financial futures contracts


John Hancock
Preferred Income Fund
Interest rate swap contracts
April 30, 2007 (unaudited)

    Rate type     

Notional  Payments made    Payments received  Termination   
amount  by Fund    by Fund  date  Appreciation 

 
$70,000,000  2.56%  (a)  3-month LIBOR  Jun 08  $1,984,022 

 
          $1,984,022 

(a) Fixed rate

Interest rate swap contracts




ITEM 2. CONTROLS AND PROCEDURES.

(a) Based upon their evaluation of the registrant's disclosure controls and procedures as conducted within 90 days of the filing date of this Form N-Q, the registrant's principal executive officer and principal financial officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms.

(b) There were no changes in the registrant's internal control over financial reporting that occurred during the registrant's last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

ITEM 3. EXHIBITS.

Separate certifications for the registrant's principal executive officer and principal financial officer, as required by Rule 30a-2(a) under the Investment Company Act of 1940, are attached.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and 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 Preferred Income Fund

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

Date: June 29, 2007

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

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

Date: June 29, 2007

By: /s/ Charles A. Rizzo
-------------------------------------
Charles A. Rizzo
Chief Financial Officer

Date: June 29, 2007