2_NQcoverpage-TaxAdvDiv.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- 21416

John Hancock Tax-Advantaged Dividend 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, Attorney 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:  December 31 
  
Date of reporting period:  March 31, 2006 

ITEM 1. SCHEDULE OF INVESTMENTS


John Hancock     
Tax-Advantaged Dividend Income Fund     
Securities owned by the Fund on     
March 31, 2006 (unaudited)     
 
 
Issuer  Shares  Value 
 
Common stocks 78.98%    $968,185,250 
(Cost $905,023,448)     
 
Diversified Banks 7.45%    91,331,420 
Bank of America Corp.  730,000  33,244,200 
Comerica, Inc.  296,000  17,159,120 
U.S. Bancorp.  647,000  19,733,500 
Wachovia Corp.  230,000  12,891,500 
Wells Fargo & Co.  130,000  8,303,100 
 
Electric Utilities 10.06%    123,300,567 
American Electric Power Co., Inc.  335,500  11,413,710 
Cinergy Corp.  539,100  24,480,531 
FPL Group, Inc.  135,000  5,418,900 
Great Plains Energy, Inc.  67,000  1,886,050 
Hawaiian Electric Industries, Inc.  75,000  2,034,750 
Pinnacle West Capital Corp.  230,000  8,993,000 
Progress Energy, Inc.  569,600  25,051,008 
Scottish Power Plc, American Depositary     
Receipt (United Kingdom)  610,000  24,576,900 
Southern Co. (The)  593,400  19,445,718 
 
Gas Utilities 8.07%    98,958,959 
Atmos Energy Corp.  756,200  19,910,746 
National Fuel Gas Co.  466,000  15,247,520 
Northwest Natural Gas Co.  325,000  11,534,250 
ONEOK, Inc.  821,100  26,480,475 
Peoples Energy Corp.  656,200  23,386,968 
Piedmont Natural Gas Co., Inc.  100,000  2,399,000 
 
Independent Power Producers & Energy Traders 1.26%    15,436,000 
Black Hills Corp.  454,000  15,436,000 
 
Integrated Oil & Gas 0.99%    12,173,700 
Chevron Corp.  210,000  12,173,700 
 
Integrated Telecommunication Services 2.53%    31,027,243 
AT&T, Inc.  670,000  18,116,800 
Verizon Communications, Inc.  379,050  12,910,443 
 
Multi-Utilities 27.96%    342,747,398 
Alliant Energy Corp.  50,000  1,573,500 
Ameren Corp.  561,100  27,954,002 
CH Energy Group, Inc.  373,600  17,932,800 
Consolidated Edison, Inc.  525,100  22,841,850 
Dominion Resources, Inc.  385,000  26,576,550 
DTE Energy Co.  609,914  24,451,452 

Page 1

John Hancock       
Tax-Advantaged Dividend Income Fund     
Securities owned by the Fund on     
March 31, 2006 (unaudited)       
 
Duke Energy Corp. (I)    521,250  15,194,437 
Energy East Corp.    573,000  13,923,900 
KeySpan Corp.    690,647  28,226,743 
NiSource, Inc.    642,700  12,995,394 
NSTAR    1,086,000  31,070,460 
OGE Energy Corp.    884,800  25,659,200 
PNM Resources, Inc.    185,000  4,514,000 
Public Service Enterprise Group, Inc.    454,700  29,118,988 
SCANA Corp.    257,500  10,104,300 
TECO Energy, Inc.    40,000  644,800 
Vectren Corp.    689,900  18,199,562 
WPS Resources Corp.    343,000  16,882,460 
Xcel Energy, Inc.    820,000  14,883,000 
 
Oil & Gas Storage & Transportation 1.07%    13,053,381 
Kinder Morgan, Inc.    141,900  13,053,381 
 
Other Diversified Financial Services 1.68%    20,649,442 
Citigroup, Inc.    187,000  8,832,010 
JPMorgan Chase & Co.    283,800  11,817,432 
 
Regional Banks 15.89%      194,749,430 
AmSouth Bancorp.    775,000  20,963,750 
BB&T Corp.    558,900  21,908,880 
Colonial BancGroup, Inc. (The)    275,000  6,875,000 
F.N.B. Corp.    190,000  3,249,000 
First Horizon National Corp.    315,000  13,119,750 
FirstMerit Corp.    365,000  9,000,900 
KeyCorp    749,000  27,563,200 
National City Corp.    745,000  26,000,500 
PNC Financial Services Group, Inc.    370,000  24,904,700 
Regions Financial Corp.    795,000  27,960,150 
Susquehanna Bancshares, Inc.    275,000  7,086,750 
Whitney Holding Corp.    172,500  6,116,850 
 
Thrifts & Mortgage Finance 2.02%      24,757,710 
People's Bank      225,000  7,368,750 
Washington Mutual, Inc.    408,000  17,388,960 
 
  Credit     
Issuer, description  rating (A)  Shares  Value 
 
Preferred stocks 20.40%      $250,005,975 
(Cost $256,244,042)       
 
Consumer Finance 0.43%      5,275,500 
HSBC Finance Corp., 6.36%, Depositary Shares,     
Ser B  BBB+  150,000  3,823,500 
SLM Corp., 6.97%, Ser A  BBB+  26,400  1,452,000 
 
Diversified Banks 2.22%      27,211,992 
Abbey National Plc, 7.375%, Depositary     
Shares, Ser B (United Kingdom)  A-  93,100  2,450,392 

Page 2

John Hancock       
Tax-Advantaged Dividend Income Fund     
Securities owned by the Fund on       
March 31, 2006 (unaudited)       
 
Royal Bank of Scotland Group Plc, 5.75%,       
Ser L (United Kingdom)  A  1,060,000  24,761,600 
 
Electric Utilities 5.91%      72,445,845 
Alabama Power Co., 5.20%  BBB+  306,500  7,493,925 
Alabama Power Co., 5.30% (Class A)  BBB+  213,000  5,241,930 
Carolina Power & Light Co., $5.44  BB+  111,493  10,368,849 
Connecticut Light & Power Co., $3.24, Ser 68G  BB+  20,686  1,063,391 
Duquesne Light Co., 6.50%  BB+  227,000  11,577,000 
Entergy Arkansas, Inc., $1.96  BB+  150,466  3,766,360 
Entergy Arkansas, Inc., $6.08  Ba1  11,372  1,058,663 
Entergy Arkansas, Inc., 4.56%  BB+  9,388  773,336 
Entergy Arkansas, Inc., 4.56%, Ser 1965  BB+  9,818  767,338 
Entergy Gulf States, Inc., $7.56  BB+  28,422  2,756,934 
Entergy Louisiana Holdings, Inc. 5.16%  Ba1  12,982  1,289,681 
Entergy Mississippi, Inc., 4.92%  Ba2  8,190  692,055 
Entergy Mississippi, Inc., 6.25%  BB+  197,500  4,832,588 
FPL Group Capital Trust I, 5.875%  BBB+  318,200  7,557,250 
Interstate Power & Light Co., 7.10%, Ser C  BBB-  20,600  546,545 
Interstate Power & Light Co., 8.375%, Ser B  Baa3  233,000  7,572,500 
Southern California Edison Co., 6.125%  BBB-  50,000  5,087,500 
 
Gas Utilities 0.89%      10,896,224 
Southern Union Co., 7.55%  BB+  417,800  10,896,224 
 
Investment Banking & Brokerage 3.03%      37,107,663 
Bear Stearns Cos., Inc. (The), 5.49%,       
Depositary Shares, Ser G  BBB  243,700  11,819,450 
Bear Stearns Cos., Inc. (The), 6.15%,       
Depositary Shares, Ser E  BBB  71,600  3,615,800 
Lehman Brothers Holdings, Inc., 5.67%,       
Depositary Shares, Ser D  A-  63,000  3,118,500 
Lehman Brothers Holdings, Inc., 5.94%,       
Depositary Shares, Ser C  A-  266,260  13,592,573 
Lehman Brothers Holdings, Inc., 6.50%,       
Depositary Shares, Ser F  A-  193,500  4,961,340 
 
Multi-Line Insurance 1.90%      23,274,125 
ING Groep NV, 6.20% (Netherlands)  A  109,100  2,700,225 
ING Groep NV, 7.05% (Netherlands)  A  100,000  2,540,000 
MetLife, Inc., 6.50%, Ser B  BBB  705,000  18,033,900 
 
Multi-Utilities 0.87%      10,674,534 
Public Service Electric & Gas Co., 5.05%,       
Ser D  BB+  23,442  2,133,222 
Public Service Electric & Gas Co., 5.28%,       
Ser E  BB+  22,930  2,125,611 
South Carolina Electric & Gas Co., 6.52%  Baa3  20,000  2,009,376 
Xcel Energy, Inc., $4.56, Ser G  BB+  53,900  4,406,325 

Page 3

John Hancock           
Tax-Advantaged Dividend Income Fund     
Securities owned by the Fund on           
March 31, 2006 (unaudited)           
 
Oil & Gas Exploration & Production 2.83%          34,703,192 
Anadarko Petroleum Corp., 5.46%, Depositary           
Shares, Ser B      BBB-  50,000  4,965,625 
Apache Corp., 5.68%, Depositary Shares, Ser B      BBB  50,000  5,071,875 
Devon Energy Corp., 6.49%, Ser A      BB+  150,000  15,154,695 
Nexen, Inc., 7.35% (Canada)      BB+  359,584  9,510,997 
Other Diversified Financial Services 2.12%          26,008,900 
ABN AMRO Capital Funding Trust V, 5.90%      A  140,000  3,256,400 
ABN AMRO Capital Funding Trust VII, 6.08%      A  950,000  22,752,500 
Reinsurance 0.20%          2,408,000 
RenaissanceRe Holdings Ltd., 6.08%, Ser C           
(Bermuda)      BBB  112,000  2,408,000 
 
Interest  Maturity  Credit  Par value   
Issuer, description  rate (%)  date  rating (A)  ($000)  Value 
 
Short-term investments 0.62%          $7,600,000 
(Cost $7,598,045)           
 
Government U.S. Agency 0.62%          7,600,000 
Federal Home Loan Bank, Disc Note  4.630  04-03-06  AAA  7,600  7,600,000 
 
Total investments 100.00%          $1,225,791,225 

Page 4

John Hancock
Tax-Advantaged Dividend Income Fund
Footnotes to Schedule of Investments
March 31, 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.

(I) Non-income-producing security.

Parenthetical disclosure of a foreign country in the security description represents country of a foreign issuer.

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

The cost of investments owned on March 31, 2006, including short-term investments, was $1,168,865,535. Gross unrealized appreciation and depreciation of investments aggregated $77,971,708 and $21,046,018, respectively, resulting in net unrealized appreciation of $56,925,690.

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 Tax-Advantaged Dividend Income Fund

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

Date: May 25, 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: May 25, 2006

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

Date: May 25, 2006