Form N-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q


QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-09161         

        Nuveen California Dividend Advantage Municipal Fund         
(Exact name of registrant as specified in charter)

Nuveen Investments
        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)


Kevin J. McCarthy Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            8/31          

Date of reporting period:         5/31/08         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

    Portfolio of Investments (Unaudited)             
    Nuveen California Dividend Advantage Municipal Fund (NAC)             
    May 31, 2008             
Principal        Optional Call         
Amount (000)    Description (1)    Provisions (2)    Ratings (3)    Value 
    Consumer Staples – 6.4% (4.0% of Total Investments)             
$       1,145    California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Bonds, Sonoma    6/15 at 100.00    BBB   $   1,057,007 
     County Tobacco Securitization Corporation, Series 2005, 4.250%, 6/01/21             
7,500    Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement    6/17 at 100.00    BBB    6,545,550 
     Asset-Backed Bonds, Series 2007A-1, 5.750%, 6/01/47             
24,265    Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement    6/22 at 100.00    BBB    14,446,653 
     Asset-Backed Bonds, Series 2007A-2, 0.000%, 6/01/37             
32,910    Total Consumer Staples            22,049,210 
    Education and Civic Organizations – 5.9% (3.6% of Total Investments)             
290    California Educational Facilities Authority, Revenue Bonds, University of Redlands, Series    10/15 at 100.00    A3    284,055 
     2005A, 5.000%, 10/01/35             
10,000    California Educational Facilities Authority, Revenue Bonds, University of Southern California,    10/17 at 100.00    AA+    9,736,800 
     Series 2007A, 4.500%, 10/01/33             
    California Educational Facilities Authority, Revenue Bonds, University of the Pacific,             
    Series 2006:             
200     5.000%, 11/01/21    11/15 at 100.00    A2    205,886 
265     5.000%, 11/01/25    11/15 at 100.00    A2    268,265 
2,343    California State Public Works Board, Lease Revenue Bonds, University of California Regents,    3/18 at 100.00    Aa2    2,343,469 
     Trust 1065, 14.320%, 3/01/33 (IF)             
615    California Statewide Community Development Authority, Revenue Bonds, Notre Dame de Namur    10/13 at 100.00    N/R    607,011 
     University, Series 2003, 6.500%, 10/01/23             
3,000    Long Beach Bond Financing Authority, California, Lease Revenue Refunding Bonds, Long Beach    11/11 at 100.00    AAA    3,199,470 
     Aquarium of the South Pacific, Series 2001, 5.500%, 11/01/17 – AMBAC Insured             
3,500    University of California, Revenue Bonds, Multi-Purpose Projects, Series 2003A, 5.125%,    5/13 at 100.00    AAA    3,738,525 
     5/15/17 – AMBAC Insured             
20,213    Total Education and Civic Organizations            20,383,481 
    Health Care – 22.3% (13.8% of Total Investments)             
2,160    California Health Facilities Financing Authority, Health Facility Revenue Bonds, Adventist    3/13 at 100.00    A    2,238,322 
     Health System/West, Series 2003A, 5.000%, 3/01/15             
    California Health Facilities Financing Authority, Revenue Bonds, Kaiser Permanante System,             
    Series 2006:             
660     5.000%, 4/01/37    4/16 at 100.00    A+    635,105 
10,140     5.250%, 3/01/45    3/16 at 100.00    A+    9,952,816 
14,895    California Health Facilities Financing Authority, Revenue Bonds, Sutter Health, Series 2007A,    11/16 at 100.00    AA–    14,866,252 
     5.250%, 11/15/46 (UB)             
10,000    California Health Facilities Financing Authority, Revenue Bonds, Sutter Health, Series 2007A,    11/16 at 100.00    AAA    10,165,300 
     5.000%, 11/15/42 – MBIA Insured             
1,120    California Statewide Communities Development Authority, Revenue Bonds, Adventist Health System    3/15 at 100.00    A    1,072,926 
     West, Series 2005A, 5.000%, 3/01/35             
1,535    California Statewide Communities Development Authority, Revenue Bonds, ValleyCare Health    7/17 at 100.00    N/R    1,309,355 
     System, Series 2007A, 5.125%, 7/15/31             
    California Statewide Community Development Authority, Revenue Bonds, Kaiser Permanante System,             
    Series 2006:             
10,000     5.000%, 3/01/41 – BHAC Insured    3/16 at 100.00    AAA    10,063,100 
9,280     5.000%, 3/01/41    3/16 at 100.00    A+    8,855,533 
3,095    California Statewide Community Development Authority, Revenue Bonds, Kaiser Permanente System,    8/16 at 100.00    A+    3,103,945 
     Series 2001C, 5.250%, 8/01/31             
1,586    California Statewide Communities Development Authority, Revenue Bonds, Saint Joseph Health    7/18 at 100.00    AAA    1,767,407 
     System, Trust 2554, 15.140%, 7/01/47 – FSA Insured (IF)             
10,500    Duarte, California, Certificates of Participation, City of Hope National Medical Center,    4/09 at 101.00    A–    10,443,930 
     Series 1999A, 5.250%, 4/01/31             
2,570    Rancho Mirage Joint Powers Financing Authority, California, Revenue Bonds, Eisenhower Medical    7/17 at 100.00    A3    2,460,133 
     Center, Series 2007A, 5.000%, 7/01/38             
77,541    Total Health Care            76,934,124 
    Housing/Multifamily – 2.4% (1.5% of Total Investments)             
5,000    Contra Costa County, California, Multifamily Housing Revenue Bonds, Delta View Apartments    6/09 at 102.00    N/R    5,066,800 
     Project, Series 1999C, 6.750%, 12/01/30 (Alternative Minimum Tax)             
320    Independent Cities Lease Finance Authority, California, Mobile Home Park Revenue Bonds, San    5/16 at 100.00    N/R    301,568 
     Juan Mobile Estates, Series 2006B, 5.850%, 5/15/41             
1,725    Rohnert Park Finance Authority, California, Senior Lien Revenue Bonds, Rancho Feliz Mobile    9/13 at 100.00    A+    1,711,373 
     Home Park, Series 2003A, 5.750%, 9/15/38             
1,120    Rohnert Park Finance Authority, California, Subordinate Lien Revenue Bonds, Rancho Feliz    9/13 at 100.00    N/R    1,134,269 
     Mobile Home Park, Series 2003B, 6.625%, 9/15/38             
8,165    Total Housing/Multifamily            8,214,010 
    Housing/Single Family – 0.2% (0.1% of Total Investments)             
775    California Housing Finance Agency, Home Mortgage Revenue Bonds, Series 2006H, 5.750%,    2/16 at 100.00    Aa2    788,625 
     8/01/30 – FGIC Insured (Alternative Minimum Tax)             
    Industrials – 1.8% (1.1% of Total Investments)             
2,000    California Pollution Control Financing Authority, Solid Waste Disposal Revenue Bonds, Waste    1/16 at 102.00    BBB    1,825,420 
     Management Inc., Series 2002A, 5.000%, 1/01/22 (Alternative Minimum Tax)             
5,120    California Statewide Communities Development Authority, Revenue Bonds, EnerTech Regional    No Opt. Call    BB    4,365,466 
     Biosolids Project, Series 2007A, 5.500%, 12/01/33 (Alternative Minimum Tax)             
7,120    Total Industrials            6,190,886 
    Long-Term Care – 2.5% (1.5% of Total Investments)             
8,500    Riverside County Public Financing Authority, California, Certificates of Participation, Air    5/09 at 101.00    BBB–    8,542,330 
     Force Village West, Series 1999, 5.800%, 5/15/29             
    Tax Obligation/General – 13.8% (8.5% of Total Investments)             
2,000    California, General Obligation Bonds, Series 2003, 5.250%, 11/01/19 – RAAI Insured    11/13 at 100.00    AA    2,097,120 
    California, General Obligation Bonds, Series 2004:             
5,000     5.125%, 4/01/23    4/14 at 100.00    A+    5,150,750 
4,150     5.125%, 4/01/25    4/14 at 100.00    A+    4,249,476 
4,435    California, General Obligation Refunding Bonds, Series 2002, 6.000%, 4/01/16 – AMBAC Insured    No Opt. Call    AAA    5,107,834 
5,000    Coast Community College District, Orange County, California, General Obligation Bonds, Series    8/16 at 100.00    AAA    5,263,300 
     2006B, 5.000%, 8/01/24 – FSA Insured             
5,000    Fresno Unified School District, Fresno County, California, General Obligation Bonds, Series    No Opt. Call    AAA    5,287,450 
     2002A, 6.000%, 8/01/26 – MBIA Insured (4)             
5,150    Hacienda La Puente Unified School District Facilities Financing Authority, California, General    No Opt. Call    AAA    5,486,810 
     Obligation Revenue Bonds, Series 2007, 5.000%, 8/01/26 – FSA Insured             
5,210    Oak Valley Hospital District, Stanislaus County, California, General Obligation Bonds, Series    7/14 at 101.00    A3    5,209,792 
     2005, 5.000%, 7/01/35 – FGIC Insured             
575    Roseville Joint Union High School District, Placer County, California, General Obligation    8/15 at 100.00    AA–    592,773 
     Bonds, Series 2006B, 5.000%, 8/01/27 – FGIC Insured             
5,000    San Diego Unified School District, San Diego County, California, General Obligation Bonds,    7/13 at 101.00    AAA    5,520,000 
     Series 2003E, 5.250%, 7/01/20 – FSA Insured             
3,605    West Contra Costa Unified School District, Contra Costa County, California, General Obligation    8/11 at 101.00    AAA    3,777,860 
     Bonds, Series 2003B, 5.000%, 8/01/21 – FSA Insured             
45,125    Total Tax Obligation/General            47,743,165 
    Tax Obligation/Limited – 36.1% (22.3% of Total Investments)             
    Beaumont Financing Authority, California, Local Agency Revenue Bonds, Series 2004D:             
1,000     5.500%, 9/01/24    9/14 at 102.00    N/R    964,020 
615     5.800%, 9/01/35    9/14 at 102.00    N/R    589,391 
1,990    Borrego Water District, California, Community Facilities District 2007-1 Montesoro, Special    8/17 at 102.00    N/R    1,880,948 
     Tax Bonds, Series 2007, 5.750%, 8/01/25             
1,990    Brentwood Infrastructure Financing Authority, California, Infrastructure Revenue Refunding    9/12 at 100.00    AAA    2,091,789 
     Bonds, Series 2002A, 5.125%, 9/02/24 – FSA Insured             
    Brentwood Infrastructure Financing Authority, Contra Costa County, California, Capital             
    Improvement Revenue Bonds, Series 2001:             
1,110     5.375%, 11/01/18 – FSA Insured    11/11 at 100.00    AAA    1,181,096 
1,165     5.375%, 11/01/19 – FSA Insured    11/11 at 100.00    AAA    1,239,618 
2,000    Capistrano Unified School District, Orange County, California, Special Tax Bonds, Community    9/13 at 100.00    N/R    2,000,220 
     Facilities District 90-2 – Talega, Series 2003, 6.000%, 9/01/33             
710    Capistrano Unified School District, Orange County, California, Special Tax Bonds, Community    9/15 at 100.00    Baa3    715,531 
     Facilities District, Series 2005, 5.000%, 9/01/24 – FGIC Insured             
1,225    Chino Redevelopment Agency, California, Merged Chino Redevelopment Project Area Tax Allocation    9/16 at 101.00    AAA    1,209,847 
     Bonds, Series 2006, 5.000%, 9/01/38 – AMBAC Insured             
3,490    Fontana, California, Senior Special Tax Refunding Bonds, Heritage Village Community Facilities    9/08 at 102.00    AAA    3,579,902 
     District 2, Series 1998A, 5.250%, 9/01/17 – MBIA Insured             
1,125    Fontana, California, Special Tax Bonds, Sierra Community Facilities District 22, Series 2004,    9/14 at 100.00    N/R    1,065,960 
     6.000%, 9/01/34             
3,980    Garden Grove, California, Certificates of Participation, Financing Project, Series 2002A,    3/12 at 101.00    AAA    4,208,731 
     5.500%, 3/01/22 – AMBAC Insured             
    Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed             
    Revenue Bonds, Series 2005A:             
37,695     5.000%, 6/01/35 – FGIC Insured (UB)    6/15 at 100.00    A    36,554,349 
4,395     5.000%, 6/01/38 – FGIC Insured (UB)    6/15 at 100.00    A    4,242,757 
2,850    Hesperia Community Redevelopment Agency, California, Tax Allocation Bonds, Series 2005A,    9/15 at 100.00    A–    2,743,125 
     5.000%, 9/01/35 – XLCA Insured             
4,500    Inglewood Redevelopment Agency, California, Tax Allocation Refunding Bonds, Merged Area    No Opt. Call    AAA    4,828,185 
     Redevelopment Project, Series 1998A, 5.250%, 5/01/23 – AMBAC Insured             
    Irvine, California, Unified School District, Community Facilities District Special Tax Bonds,             
    Series 2006A:             
345     5.000%, 9/01/26    9/16 at 100.00    N/R    309,662 
795     5.125%, 9/01/36    9/16 at 100.00    N/R    701,293 
675    Lammersville School District, San Joaquin County, California, Community Facilities District    9/16 at 100.00    N/R    577,314 
     2002, Mountain House Special Tax Bonds, Series 2006, 5.125%, 9/01/35             
2,000    Lee Lake Water District, Riverside County, California, Special Tax Bonds, Community Facilities    9/13 at 102.00    N/R    2,026,820 
     District 1 of Sycamore Creek, Series 2003, 6.500%, 9/01/24             
1,000    Lindsay Redevelopment Agency, California, Project 1 Tax Allocation Bonds, Series 2007, 5.000%,    8/17 at 100.00    AA    951,360 
     8/01/37 – RAAI Insured             
1,290    Los Angeles Community Redevelopment Agency, California, Lease Revenue Bonds, Manchester Social    9/15 at 100.00    Aaa    1,287,936 
     Services Project, Series 2005, 5.000%, 9/01/37 – AMBAC Insured             
5,000    Los Angeles County Metropolitan Transportation Authority, California, Proposition C Second    7/08 at 101.00    AAA    5,054,300 
     Senior Lien Sales Tax Revenue Refunding Bonds, Series 1998A, 5.000%, 7/01/23 – AMBAC Insured             
1,530    Moreno Valley Unified School District, Riverside County, California, Certificates of    3/14 at 100.00    AAA    1,577,675 
     Participation, Series 2005, 5.000%, 3/01/24 – FSA Insured             
3,500    Murrieta Redevelopment Agency, California, Tax Allocation Bonds, Series 2007A, 5.000%,    8/17 at 100.00    AAA    3,540,845 
     8/01/37 – MBIA Insured             
9,200    Norco Redevelopment Agency, California, Tax Allocation Refunding Bonds, Project Area 1, Series    3/11 at 102.00    AAA    9,583,916 
     2001, 5.000%, 3/01/19 – MBIA Insured             
    North Natomas Community Facilities District 4, Sacramento, California, Special Tax Bonds,             
    Series 2006D:             
545     5.000%, 9/01/26    9/14 at 102.00    N/R    480,859 
250     5.000%, 9/01/33    9/14 at 102.00    N/R    211,523 
3,290    Oakland Redevelopment Agency, California, Subordinate Lien Tax Allocation Bonds, Central    3/13 at 100.00    A–    3,510,989 
     District Redevelopment Project, Series 2003, 5.500%, 9/01/16 – FGIC Insured             
5,600    Palm Springs Financing Authority, California, Lease Revenue Refunding Bonds, Convention Center    11/11 at 101.00    AAA    5,797,512 
     Project, Series 2001A, 5.000%, 11/01/22 – MBIA Insured             
1,000    Palmdale Community Redevelopment Agency, California, Tax Allocation Bonds, Merged    12/14 at 100.00    AAA    1,022,820 
     Redevelopment Project Areas, Series 2004, 5.000%, 12/01/24 – AMBAC Insured             
1,570    Poway Redevelopment Agency, California, Tax Allocation Refunding Bonds, Paguay Redevelopment    12/10 at 102.00    AAA    1,671,610 
     Project, Series 2000, 5.750%, 6/15/33 – MBIA Insured             
620    Rialto Redevelopment Agency, California, Tax Allocation Bonds, Merged Project Area, Series    9/15 at 100.00    A–    618,121 
     2005A, 5.000%, 9/01/35 – XLCA Insured             
1,860    Riverside Redevelopment Agency, California, Tax Allocation Refunding Bonds, Merged Project    8/13 at 100.00    AAA    1,933,154 
     Areas, Series 2003, 5.250%, 8/01/22 – MBIA Insured             
770    Roseville, California, Certificates of Participation, Public Facilities, Series 2003A, 5.000%,    8/13 at 100.00    AAA    781,504 
     8/01/25 – AMBAC Insured             
2,500    Sacramento City Financing Authority, California, Lease Revenue Refunding Bonds, Series 1993A,    No Opt. Call    AAA    2,683,600 
     5.400%, 11/01/20 – AMBAC Insured             
1,150    Sacramento, California, Special Tax Bonds, North Natomas Community Facilities District 4,    9/14 at 100.00    N/R    1,135,878 
     Series 2003C, 6.000%, 9/01/33             
2,695    San Jose Financing Authority, California, Lease Revenue Refunding Bonds, Civic Center Project,    6/12 at 100.00    AAA    2,839,344 
     Series 2002B, 5.250%, 6/01/19 – AMBAC Insured             
1,000    Washington Unified School District, Yolo County, California, Certificates of Participation,    8/17 at 100.00    AAA    1,003,560 
     Series 2007, 5.125%, 8/01/37 – AMBAC Insured             
2,810    West Patterson Financing Authority, California, Special Tax Bonds, Community Facilities    9/13 at 103.00    N/R    3,011,280 
     District 01-1, Series 2003B, 7.000%, 9/01/38             
2,000    West Patterson Financing Authority, California, Special Tax Bonds, Community Facilities    9/13 at 102.00    N/R    1,899,440 
     District 01-1, Series 2004B, 6.000%, 9/01/39             
1,350    West Patterson Financing Authority, California, Special Tax Bonds, Community Facilities    9/13 at 103.00    N/R    1,309,325 
     District 2001-1, Series 2004A, 6.125%, 9/01/39             
124,185    Total Tax Obligation/Limited            124,617,109 
    Transportation – 18.9% (11.7% of Total Investments)             
1,430    Bay Area Toll Authority, California, Revenue Bonds, San Francisco Bay Area Toll Bridge, Series    4/16 at 100.00    AA    1,470,984 
     2006, 5.000%, 4/01/31 (UB)             
8,150    Foothill/Eastern Transportation Corridor Agency, California, Toll Road Revenue Refunding    1/10 at 101.00    BBB–    8,025,631 
     Bonds, Series 1999, 5.750%, 1/15/40             
8,515    Los Angeles Harbors Department, California, Revenue Refunding Bonds, Series 2001B, 5.500%,    8/11 at 100.00    AAA    8,697,987 
     8/01/18 – AMBAC Insured (Alternative Minimum Tax)             
120    Palm Springs Financing Authority, California, Palm Springs International Airport Revenue    7/14 at 102.00    N/R    114,625 
     Bonds, Series 2006, 5.450%, 7/01/20 (Alternative Minimum Tax)             
23,000    Port of Oakland, California, Revenue Bonds, Series 2000K, 5.750%, 11/01/29 – FGIC Insured    5/10 at 100.00    A+    23,156,170 
     (Alternative Minimum Tax)             
23,275    San Francisco Airports Commission, California, Revenue Bonds, San Francisco International    5/10 at 101.00    AAA    23,724,208 
     Airport, Second Series 2000, Issue 24A, 5.750%, 5/01/30 – FSA Insured (Alternative Minimum Tax)             
64,490    Total Transportation            65,189,605 
    U.S. Guaranteed – 30.2% (18.7% of Total Investments) (5)             
9,750    California Department of Water Resources, Power Supply Revenue Bonds, Series 2002A, 5.125%,    5/12 at 101.00    Aaa    10,653,338 
     5/01/18 (Pre-refunded 5/01/12)             
115    California Department of Water Resources, Water System Revenue Bonds, Central Valley Project,    12/11 at 100.00    Aaa    124,862 
     Series 2001W, 5.250%, 12/01/22 (Pre-refunded 12/01/11) – FSA Insured             
10,500    California Health Facilities Financing Authority, Revenue Bonds, Cedars-Sinai Medical Center,    12/09 at 101.00    N/R (5)    11,221,350 
     Series 1999A, 6.125%, 12/01/30 (Pre-refunded 12/01/09)             
8,400    California Health Facilities Financing Authority, Revenue Bonds, Kaiser Permanente System,    10/08 at 101.00    AAA    8,559,432 
     Series 1998B, 5.250%, 10/01/14 (ETM)             
740    California Statewide Community Development Authority, Revenue Bonds, Thomas Jefferson School    10/15 at 100.00    BBB– (5)    780,485 
     of Law, Series 2005A, 4.875%, 10/01/31 (Pre-refunded 10/01/15)             
8,000    Central California Joint Powers Health Finance Authority, Certificates of Participation,    2/10 at 101.00    AAA    8,566,720 
     Community Hospitals of Central California Obligated Group, Series 2000, 6.000%, 2/01/30             
     (Pre-refunded 2/01/10)             
4,850    Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed    6/13 at 100.00    AAA    5,339,220 
     Bonds, Series 2003A-1, 6.250%, 6/01/33 (Pre-refunded 6/01/13)             
1,940    Lincoln, California, Special Tax Bonds, Lincoln Crossing Community Facilities District 03-1,    9/13 at 102.00    N/R (5)    2,278,763 
     Series 2003A, 6.500%, 9/01/25 (Pre-refunded 9/01/13)             
1,335    Lincoln, California, Special Tax Bonds, Lincoln Crossing Community Facilities District 03-1,    9/13 at 102.00    N/R (5)    1,536,091 
     Series 2004, 6.000%, 9/01/34 (Pre-refunded 9/01/13)             
10,845    Los Angeles Unified School District, California, General Obligation Bonds, Series 2002E,    7/12 at 100.00    AAA    11,731,579 
     5.000%, 7/01/19 (Pre-refunded 7/01/12) – MBIA Insured             
    Northern California Tobacco Securitization Authority, Tobacco Settlement Asset-Backed Bonds,             
    Series 2001A:             
2,500     5.250%, 6/01/31 (Pre-refunded 6/01/11)    6/11 at 100.00    AAA    2,687,550 
4,500     5.375%, 6/01/41 (Pre-refunded 6/01/11)    6/11 at 100.00    AAA    4,853,745 
5,840    Orange County Water District, California, Revenue Certificates of Participation, Series 1999A,    8/09 at 101.00    AA+ (5)    6,031,844 
     5.375%, 8/15/29 (ETM)             
6,530    Poway Redevelopment Agency, California, Tax Allocation Refunding Bonds, Paguay Redevelopment    12/10 at 102.00    Aaa    7,194,036 
     Project, Series 2000, 5.750%, 6/15/33 (Pre-refunded 12/15/10) – MBIA Insured             
4,000    Puerto Rico, General Obligation and Public Improvement Bonds, Series 2000, 5.750%, 7/01/16    7/10 at 100.00    AAA    4,266,320 
     (Pre-refunded 7/01/10) – MBIA Insured             
2,860    Tobacco Securitization Authority of Southern California, Tobacco Settlement Asset-Backed    6/12 at 100.00    AAA    3,106,875 
     Bonds, San Diego County Tobacco Asset Securitization Corporation, Senior Series 2001A, 5.250%,             
     6/01/27 (Pre-refunded 6/01/12)             
700    University of California, Certificates of Participation, San Diego and Sacramento Campus    1/10 at 101.00    Aa1 (5)    739,228 
     Projects, Series 2002A, 5.250%, 1/01/22 (Pre-refunded 1/01/10)             
11,305    University of California, Revenue Bonds, Multi-Purpose Projects, Series 2002O, 5.000%, 9/01/21    9/10 at 101.00    AA (5)    12,082,219 
     (Pre-refunded 9/01/10) – FGIC Insured             
2,500    Whittier, California, Health Facility Revenue Bonds, Presbyterian Intercommunity Hospital,    6/12 at 101.00    A+ (5)    2,776,848 
     Series 2002, 5.600%, 6/01/22 (Pre-refunded 6/01/12)             
97,210    Total U.S. Guaranteed            104,530,505 
    Utilities – 8.8% (5.4% of Total Investments)             
3,630    Imperial Irrigation District, California, Certificates of Participation, Electric System    11/13 at 100.00    AAA    3,787,869 
     Revenue Bonds, Series 2003, 5.250%, 11/01/23 – FSA Insured             
3,775    Long Beach Bond Finance Authority, California, Natural Gas Purchase Revenue Bonds, Series    No Opt. Call    A+    3,415,205 
     2007A, 5.000%, 11/15/35             
7,000    Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Series    7/11 at 100.00    AAA    7,323,890 
     2001A-1, 5.250%, 7/01/21 – FSA Insured             
8,370    Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Series    7/11 at 100.00    AAA    8,806,244 
     2001A-2, 5.375%, 7/01/19 – MBIA Insured             
5,500    Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Series    7/15 at 100.00    AAA    5,661,700 
     2005A-1, 5.000%, 7/01/31 – FSA Insured             
1,270    Merced Irrigation District, California, Electric System Revenue Bonds, Series 2005, 5.125%,    9/15 at 100.00    A–    1,271,419 
     9/01/31 – XLCA Insured             
29,545    Total Utilities            30,266,327 
    Water and Sewer – 9.1% (5.7% of Total Investments)             
9,050    California Department of Water Resources, Water System Revenue Bonds, Central Valley Project,    12/11 at 100.00    AAA    9,515,985 
     Series 2001W, 5.250%, 12/01/22 – FSA Insured             
875    Healdsburg Public Financing Authority, California, Wastewater Revenue Bonds, Series 2006,    4/16 at 100.00    AAA    884,555 
     5.000%, 4/01/36 – MBIA Insured             
2,500    Indio Water Authority, California, Water Revenue Bonds, Series 2006, 5.000%, 4/01/31 –    4/16 at 100.00    AAA    2,522,425 
     AMBAC Insured             
835    Marina Coast Water District, California, Enterprise Certificate of Participation, Series 2006,    6/16 at 100.00    AAA    839,375 
     5.000%, 6/01/31 – MBIA Insured             
8,250    Pico Rivera Water Authority, California, Revenue Bonds, Series 2001A, 6.250%, 12/01/32    12/11 at 102.00    N/R    8,224,343 
1,855    Puerto Rico Aqueduct and Sewerage Authority, Revenue Bonds, Senior Lien Series 2008A,    7/18 at 100.00    BBB–    1,965,762 
     6.000%, 7/01/38             
2,250    Sacramento County Sanitation District Financing Authority, California, Revenue Bonds, Series    6/16 at 100.00    AA    2,305,148 
     2006, 5.000%, 12/01/31 – FGIC Insured             
5,115    San Francisco City and County Public Utilities Commission, California, Water Revenue Bonds,    11/12 at 100.00    AAA    5,338,063 
     Series 2002A, 5.000%, 11/01/18 – MBIA Insured             
30,730    Total Water and Sewer            31,595,656 
$   546,509    Total Long-Term Investments (cost $541,628,028) – 158.4%            547,045,033 
    Short-Term Investments – 3.4% (2.1% of Total Investments)             
1,275    Adelanto, California, Public Utility System Revenue Bonds, Variable Rate Demand Obligations, Auction        A-1+    1,275,000 
     Rate Securities Series 2007A, 3.500%, 11/01/34 – AMBAC Insured (6)             
1,000    California Statewide Communities Development Authority, Revenue Bonds, Rady Children’s        Aa3    1,000,000 
     Hospital of San Diego, Variable Rate Demand Obligations, Series 2007B, 2.740%, 8/15/47 –             
     AMBAC Insured (6)             
6,550    California Statewide Community Development Authority, Insured Revenue Bonds, Childrens        Aa3    6,550,000 
     Hospital Los Angeles, Variable Rate Demand Obligations Series 2002A, 3.250%, 8/15/32 –             
     AMBAC Insured (6)             
2,000    Pasadena, California, Certificates of Participation, Variable Rate Demand Obligations, City        VMIG-1    2,000,000 
     Hall and Park Improvement Projects, Series 2003, 2.750%, 2/01/33 – AMBAC Insured (6)             
1,000    Pittsburg Redevelopment Agency, California, Tax Allocation Bonds, Los Medanos Community        AA    1,000,000 
     Development Project, Variable Rate Demand Obligations, Series 2006A, 3.850%, 9/01/36 –             
     AMBAC Insured (6)             
$        11,825    Total Short-Term Investments (cost $11,825,000)            11,825,000 
    Total Investments (cost $553,453,028) – 161.8%            558,870,033 
  Floating Rate Obligations – (12.3)%        (42,560,000)
  Other Assets Less Liabilities – 1.2%        4,109,441 
  Preferred Shares, at Liquidation Value – (50.7)% (7)        (175,000,000)
  Net Assets Applicable to Common Shares – 100%       $  345,419,474 

(1)    All percentages shown in the Portfolio of Investments are based on net assets applicable to Common 
    shares unless otherwise noted. 
(2)    Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. 
    There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities 
    may be subject to periodic principal paydowns. 
(3)    Ratings: Using the higher of Standard & Poor’s Group (“Standard & Poor’s”) or Moody’s Investor Service, 
    Inc. (“Moody’s”) rating. Ratings below BBB by Standard & Poor’s or Baa by Moody’s are considered to 
    be below investment grade. 
    The Portfolio of Investments may reflect the ratings on certain bonds insured by ACA, AMBAC, CIFG, FGIC, 
    MBIA, RAAI and XLCA as of May 31, 2008. Subsequent to May 31, 2008, and during the period this Portfolio 
    of Investments was prepared, there may have been reductions to the ratings of certain bonds resulting from 
    changes to the ratings of the underlying insurers both during the period and after period end. Such reductions 
    would likely reduce the effective rating of many of the bonds insured by that insurer or insurers presented 
    at period end. 
(4)    The issuer has received a formal adverse determination from the Internal Revenue Service (the “IRS”) 
    regarding the tax-exempt status of the bonds’ coupon payments. The Fund will continue to treat coupon 
    payments as tax-exempt income until such time it is formally determined that the interest on the bonds 
    should be treated as taxable. 
(5)    Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities 
    which ensure the timely payment of principal and interest. Such investments are normally considered to 
    be equivalent to AAA rated securities. 
(6)    Investment has a maturity of more than one year, but has variable rate and demand features which qualify 
    it as a short-term investment. The rate disclosed is that in effect at the end of the reporting period. This 
    rate changes periodically based on market conditions or a specified market index. 
(7)    Preferred Shares, at Liquidation Value as a percentage of total investments is (31.3)%. 
N/R    Not rated. 
(ETM)    Escrowed to maturity. 
(IF)    Inverse floating rate investment. 
(UB)    Underlying bond of an inverse floating rate trust reflected as a financing transaction pursuant to the 
    provisions of SFAS No. 140. 

Income Tax Information

The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to timing differences in recognizing taxable market discount, timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate transactions subject to SFAS No.140. To the extent that differences arise that are permanent in nature, such amounts are reclassified within the capital accounts on the Statement of Assets and Liabilities presented in the annual report, based on their federal tax basis treatment; temporary differences do not require reclassification. Temporary and permanent differences do not impact the net asset value of the Fund.

At May 31, 2008, the cost of investments was $510,724,211.

Gross unrealized appreciation and gross unrealized depreciation of investments at May 31, 2008, were as follows:

Gross unrealized:     
  Appreciation    $  16,878,385 
  Depreciation    (11,292,880) 
Net unrealized appreciation (depreciation) of investments    $    5,585,505 

Item 2. Controls and Procedures.

  1. The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
  2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: See EX-99 CERT attached hereto.


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.

(Registrant)         Nuveen California Dividend Advantage Municipal Fund         

By (Signature and Title)          /s/ Kevin J. McCarthy                    
                                                  Kevin J. McCarthy
                                                  Vice President and Secretary

Date         July 29, 2008        

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 (Signature and Title)         /s/ Gifford R. Zimmerman                    
                                                 Gifford R. Zimmerman
                                                 Chief Administrative Officer (principal executive officer) 

Date         July 29, 2008        

By (Signature and Title)         /s/ Stephen D. Foy                              
                                                 Stephen D. Foy
                                                 Vice President and Controller (principal financial officer) 

Date        July 29, 2008