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- 5615

John Hancock Patriot Premium Dividend Fund I (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 Attorney & 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: September 30

Date of reporting period: June 30, 2006

ITEM 1. SCHEDULE OF INVESTMENTS




John Hancock
Patriot Premium Dividend Fund I
Securities owned by the Fund on
June 30, 2006 (unaudited)

Issuer      Shares  Value 
  
Common stocks 36.27%      $76,550,499 

(Cost $67,625,473)         
     
Electric Utilities 2.57%      5,431,665 

FPL Group, Inc.      20,000  827,600 
Pinnacle West Capital Corp.    37,000  1,476,670 
Progress Energy, Inc.      72,500  3,108,075 
Progress Energy, Inc., (Contingent Value Obligation)       
(B)(I)      69,000  19,320 
      
Gas Utilities 1.99%        4,200,273 

National Fuel Gas Co.      59,850  2,103,129 
Peoples Energy Corp.      58,400  2,097,144 
    
Integrated Telecommunication Services 1.82%      3,837,555 

AT&T, Inc.      97,850  2,729,036 
Verizon Communications, Inc.    33,100  1,108,519 
     
Multi-Utilities 29.18%        61,582,656 

Alliant Energy Corp.      144,380  4,952,234 
Ameren Corp.      45,900  2,317,950 
CH Energy Group, Inc.      151,050  7,250,400 
Consolidated Edison, Inc.    32,000  1,422,080 
Dominion Resources, Inc.    64,300  4,808,997 
DTE Energy Co.      126,000  5,133,240 
Duke Energy Corp.      84,650  2,486,171 
Energy East Corp.      257,000  6,150,010 
KeySpan Corp.      136,450  5,512,580 
NiSource, Inc.      87,450  1,909,908 
NSTAR      350,000  10,010,000 
Public Service Enterprise Group, Inc.    16,000  1,057,920 
SCANA Corp.      21,700  837,186 
TECO Energy, Inc.      173,000  2,584,620 
WPS Resources Corp.      40,400  2,003,840 
Xcel Energy, Inc.      164,000  3,145,520 
     
Oil & Gas Storage & Transportation 0.71%      1,498,350 

Kinder Morgan, Inc.      15,000  1,498,350 
   
 
    Credit     
Issuer, description    rating (A)  Shares  Value 
  
Preferred stocks 59.49%      $125,567,607 

(Cost $127,932,360)         
     
Agricultural Products  1.27%      2,678,596 

Ocean Spray Cranberries, Inc., 6.25%, Ser A (S)  BB+  35,000  2,678,596 

Page 1


John Hancock
Patriot Premium Dividend Fund I
Securities owned by the Fund on
June 30, 2006 (unaudited)

Consumer Finance 0.56%      1,183,100 

CIT Group, Inc., 6.35%, Ser A  BBB+  20,000  490,200 
SLM Corp., 6.97%, Ser A  BBB+  13,000  692,900 
    
Diversified Banks 0.94%      1,984,104 

HSBC Holdings Plc, 6.20%, Ser A (United Kingdom)  A-  25,000  581,000 
Royal Bank of Scotland Group Plc, 5.75%, Ser L (United       
Kingdom)  A  65,200  1,403,104 
    
Electric Utilities 23.61%      49,841,726 

Alabama Power Co., 5.20%  BBB+  240,000  5,224,800 
Boston Edison Co., 4.25%  A-  58,152  4,317,786 
Boston Edison Co., 4.78%  A-  25,558  2,134,093 
Duquesne Light Co., 6.50%  BB+  105,900  5,305,590 
Entergy Arkansas, Inc., 6.45%  BB+  50,000  1,240,625 
Entergy Mississippi, Inc., 6.25%  BB+  150,000  3,637,500 
FPC Capital I, 7.10%, Ser A  BB+  136,400  3,358,168 
Georgia Power Co., 6.00%, Ser R  A  213,800  4,861,812 
Great Plains Energy, Inc., 4.50%  BB+  12,510  994,545 
Great Plains Energy, Inc., 8.00%, Conv  BBB-  99,900  2,322,675 
HECO Capital Trust III, 6.50%  BBB-  70,400  1,731,840 
Interstate Power & Light Co., 7.10%, Ser C  BBB-  25,000  640,625 
Interstate Power & Light Co., 8.375%, Ser B  Baa3  25,000  762,500 
PPL Electric Utilities Corp., 4.60%  BBB  3,917  343,717 
PPL Electric Utilities Corp., 6.25%, Depositary Shares  BBB  200,000  4,812,500 
Public Service Electric & Gas Co., 4.30%, Ser C  BB+  8,280  641,700 
Southern California Edison Co., 6.00%, Ser C  BBB-  12,000  1,120,500 
Southern California Edison Co., 6.125%  BBB-  35,000  3,283,437 
Virginia Electric & Power Co., $7.05  BB+  10,200  1,060,800 
Xcel Energy, Inc., $4.11, Ser D  BB+  24,921  2,046,513 
   
Gas Utilities 2.43%      5,126,039 

Southern Union Co., 7.55%, Ser A  BB+  201,100  5,126,039 
   
Integrated Telecommunication Services 1.11%      2,334,529 

Telephone & Data Systems, Inc., 6.625%  A-  101,900  2,334,529 
   
Investment Banking & Brokerage 7.64%      16,134,478 

Bear Stearns Cos., Inc. (The), 5.49%, Depositary Shares, Ser G  BBB  25,200  1,115,100 
Bear Stearns Cos., Inc. (The), 5.72%, Depositary Shares, Ser F  BBB  102,460  4,808,448 
Goldman Sachs Group, Inc., 6.20%, Ser B  A-  20,000  494,000 
Lehman Brothers Holdings, Inc., 5.67%, Depositary Shares, Ser D  A-  102,700  4,693,390 
Lehman Brothers Holdings, Inc., 5.94%, Depositary Shares, Ser C  A-  90,400  4,280,440 
Merrill Lynch & Co, Inc. 6.375%, Depositary Shares, Ser 3  A-  30,000  743,100 
    
Life & Health Insurance 1.34%      2,832,450 

MetLife, Inc., 6.50%, Ser B  BBB  115,000  2,832,450 

Page 2


John Hancock
Patriot Premium Dividend Fund I
Securities owned by the Fund on
June 30, 2006 (unaudited)

Multi-Utilities 13.41%          28,296,401 

Baltimore Gas & Electric Co., 6.99%, Ser 1995    Ba1  34,000  3,524,314 
BGE Capital Trust II, 6.20%      BBB-  205,000  4,602,250 
Energy East Capital Trust I, 8.25%      BBB-  200,000  5,074,000 
PNM Resources, Inc., 6.75%, Conv      BBB-  98,049  4,814,206 
PSEG Funding Trust II, 8.75%      BB+  71,400  1,848,546 
Public Service Electric & Gas Co., 6.92%    BB+  26,800  2,613,839 
South Carolina Electric & Gas Co., 6.52%    Baa1  55,000  5,501,721 
TECO Capital Trust I, 8.50%      B  12,501  317,525 

Oil & Gas Exploration & Production 6.05%
 
      12,773,284 

Apache Corp., 5.68%, Depositary Shares, Ser B    BBB  26,700  2,612,429 
Devon Energy Corp., 6.49%, Ser A      BB+  50,000  5,017,190 
Nexen, Inc., 7.35% (Canada)      BB+  205,500  5,143,665 

Regional Banks 1.13%
 
        2,382,900 

HSBC USA, Inc., $2.8575 (G)      A1  50,700  2,382,900 
  
   
    Interest    Par value   
Issuer, description, maturity date    rate (%)    ($000)  Value 
Short-term investments 4.24%        $8,958,000 

(Cost $8,955,462)           
    
Commercial Paper 4.24%          8,958,000 

Chevron Texaco Corp., Due 7-3-06    5.100    8,958  8,958,000 
     
Total investments 100.00%        $211,076,106 

Page 3


John Hancock
Patriot Premium Dividend Fund I
Footnotes to Schedule of Investments
June 30, 2006 (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.

(B) This security is fair valued in good faith under procedures established by the Board of Trustees.

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

(I) Non-income-producing security.

(S) This security is exempt from registration under Rule 144A of the Securities Act of 1933. Such security may be resold, normally to qualified institutional buyers, in transactions exempt from registration. Rule 144A securities amounted to $2,678,596 or 1.27% of the Fund's total investments as of June 30, 2006.

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 June 30, 2006, including short-term investments, was $204,513,295. Gross unrealized appreciation and depreciation of investments aggregated $14,177,984 and $7,615,173, respectively, resulting in net unrealized appreciation of $6,562,811.

 

Footnotes to Schedule of Investments - Page 1




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 Patriot Premium Dividend Fund I

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

Date: August 29, 2006

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: August 29, 2006

By: /s/ John G. Vrysen
-------------------------------------
John G. Vrysen
Executive Vice President and Chief Financial Officer

Date: August 29, 2006