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         811-09449         

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


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


Jessica R. Droeger—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:          11/30/05         

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 Insured California Dividend Advantage Municipal Fund (NKL)
November 30, 2005

Principal    Optional Call    Market 
Amount (000)  Description(1)   Provisions*  Ratings**  Value 
  Consumer Staples - 2.3% (1.5% of Total Investments)       
$ 4,500  Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed  6/13 at 100.00  BBB  $ 5,422,185 
  Revenue Bonds, Series 2003A-2, 7.900%, 6/01/42       
  Education and Civic Organizations - 8.7% (5.9% of Total Investments)       
1,675  California Educational Facilities Authority, Revenue Bonds, University of San Diego, Series 2002A,  10/12 at 100.00  A2  1,732,670 
  5.250%, 10/01/30       
9,000  California State University, Systemwide Revenue Bonds, Series 2002A, 5.125%, 11/01/26 - AMBAC  11/12 at 100.00  AAA  9,387,990 
  Insured       
9,000  University of California, Revenue Bonds, Multiple Purpose Projects, Series 2000K, 5.300%, 9/01/30  9/08 at 101.00  AA  9,255,150 
  Healthcare - 5.5% (3.7% of Total Investments)       
5,000  ABAG Finance Authority for Non-Profit Corporations, California, Cal-Mortgage Insured Revenue Bonds,  4/12 at 100.00  A  5,310,450 
  Sansum-Santa Barbara Medical Foundation Clinic, Series 2002A, 5.600%, 4/01/26       
2,815  California Health Facilities Financing Authority, Revenue Bonds, Lucile Salter Packard Children's  8/13 at 100.00  AAA  2,940,127 
  Hospital, Series 2003C, 5.000%, 8/15/20 - AMBAC Insured       
1,090  California State Public Works Board, Revenue Bonds, University of California - Davis Medical  11/14 at 100.00  AAA  1,140,641 
  Center, Series 2004II-A, 5.000%, 11/01/21 - MBIA Insured       
3,380  Rancho Mirage Joint Powers Financing Authority, California, Revenue Bonds, Eisenhower Medical  7/14 at 100.00  A3  3,602,472 
  Center, Series 2004, 5.875%, 7/01/26       
  Housing/Multifamily - 1.3% (0.9% of Total Investments)       
1,000  California Statewide Community Development Authority, Student Housing Revenue Bonds, EAH - Irvine  8/12 at 100.00  A  1,049,070 
  East Campus Apartments, LLC Project, Series 2002A, 5.500%, 8/01/22 - ACA Insured       
1,905  Los Angeles, California, GNMA Mortgage-Backed Securities Program Multifamily Housing Revenue Bonds,  7/11 at 102.00  AAA  1,993,583 
  Park Plaza West Senior Apartments, Series 2001B, 5.300%, 1/20/21 (Alternative Minimum Tax)       
  Industrials - 1.3% (0.9% of Total Investments)       
3,000  California Pollution Control Financing Authority, Solid Waste Disposal Revenue Bonds, Republic  No Opt. Call  BBB+  3,143,040 
  Services Inc., Series 2002C, 5.250%, 6/01/23 (Alternative Minimum Tax) (Mandatory put 12/01/17)       
  Long-Term Care - 3.5% (2.4% of Total Investments)       
3,000  ABAG Finance Authority for Non-Profit Corporations, California, Insured Senior Living Revenue  11/12 at 100.00  A  3,122,580 
  Bonds, Odd Fellows Home of California, Series 2003A, 5.200%, 11/15/22       
5,000  California Statewide Community Development Authority, Revenue Bonds, Jewish Home for the Aging,  11/13 at 100.00  A  5,184,200 
  Series 2003, 5.000%, 11/15/18       
  Tax Obligation/General - 32.1% (21.6% of Total Investments)       
5,920  Cajon Valley Union School District, San Diego County, California, General Obligation Bonds, Series  8/10 at 102.00  AAA  6,131,818 
  2002B, 5.125%, 8/01/32 - MBIA Insured       
9,000  California, General Obligation Refunding Bonds, Series 2002, 5.000%, 2/01/22 - MBIA Insured  2/12 at 100.00  AAA  9,330,300 
2,900  California, General Obligation Bonds, Series 2003, 5.000%, 2/01/21  8/13 at 100.00  A  3,018,755 
  Compton Community College District, Los Angeles County, California, General Obligation Bonds,      
  Series 2004A:      
1,315  5.250%, 7/01/22 - MBIA Insured 7/14 at 100.00  AAA  1,418,043 
2,560  5.250%, 7/01/23 - MBIA Insured 7/14 at 100.00  AAA  2,754,867 
2,415  El Monte Union High School District, Los Angeles County, California, General Obligation Bonds, 6/13 at 100.00  AAA  2,498,148 
  Series 2003A, 5.000%, 6/01/28 - FSA Insured      
10,000  Fremont Unified School District, Alameda County, California, General Obligation Bonds, Series 8/12 at 101.00  AAA  10,408,200 
  2002A, 5.000%, 8/01/25 - FGIC Insured      
1,520  Los Angeles Community College District, Los Angeles County, California, General Obligation Bonds, 8/15 at 100.00  AAA  1,591,714 
  Series 2005A, 5.000%, 6/01/26 - FSA Insured      
5,000  Los Angeles Unified School District, California, General Obligation Bonds, Series 2002E, 5.125%, 7/12 at 100.00  AAA  5,203,700 
  1/01/27 - MBIA Insured      
  Los Angeles Unified School District, California, General Obligation Bonds, Series 2003A:      
3,700  5.000%, 7/01/22 - FSA Insured 7/13 at 100.00  AAA  3,901,539 
3,500  5.000%, 1/01/28 - MBIA Insured 7/13 at 100.00  AAA  3,637,970 
1,500  Madera Unified School District, Madera County, California, General Obligation Bonds, Series 2002, 8/12 at 100.00  AAA  1,548,375 
  5.000%, 8/01/28 - FSA Insured      
2,500  Oakland Unified School District, Alameda County, California, General Obligation Bonds, Series 2002, 8/12 at 100.00  AAA  2,680,600 
  5.250%, 8/01/21 - FGIC Insured      
  Oakland Unified School District, Alameda County, California, General Obligation Bonds, Series 2005:      
505  5.000%, 8/01/25 - MBIA Insured 8/15 at 100.00  AAA  527,614 
530  5.000%, 8/01/26 - MBIA Insured 8/15 at 100.00  AAA  553,309 
3,250  San Diego Unified School District, San Diego County, California, General Obligation Bonds, Election 7/11 at 102.00  AAA  3,511,755 
  of 1998, Series 2001C, 5.000%, 7/01/22 - FSA Insured      
1,160  San Gabriel Unified School District, Los Angeles County, California, General Obligation Bonds, 8/15 at 100.00  AAA  1,227,860 
  Series 2005, 5.000%, 8/01/22 - FSA Insured      
  San Jose-Evergreen Community College District, Santa Clara County, California, General Obligation      
  Bonds, Series 2005A:      
395  5.000%, 9/01/25 - MBIA Insured 9/15 at 100.00  AAA  414,082 
575  5.000%, 9/01/27 - MBIA Insured 9/15 at 100.00  AAA  600,921 
3,500  San Mateo County Community College District, California, General Obligation Bonds, Series 2002A, 9/12 at 100.00  AAA  3,622,325 
  5.000%, 9/01/26 - FGIC Insured      
10,000  Vista Unified School District, San Diego County, California, General Obligation Bonds, Series 8/12 at 100.00  AAA  10,449,300 
  2002A, 5.000%, 8/01/23 - FSA Insured      
  Tax Obligation/Limited - 42.0% (28.3% of Total Investments)      
1,450  Baldwin Park Public Financing Authority, California, Sales Tax and Tax Allocation Bonds, Puente 8/13 at 102.00  BBB  1,508,334 
  Merced Redevelopment Project, Series 2003, 5.250%, 8/01/21      
6,895  Brea and Olinda Unified School District, Orange County, California, Certificates of Participation 8/11 at 101.00  AAA  7,138,462 
  Refunding, Series 2002A, 5.125%, 8/01/26 - FSA Insured      
2,290  Burbank Public Financing Authority, California, Revenue Refunding Bonds, Golden State Redevelopment 12/13 at 100.00  AAA  2,468,941 
  Project, Series 2003A, 5.250%, 12/01/19 - AMBAC Insured      
2,200  California Infrastructure Economic Development Bank, Los Angeles County, Revenue Bonds, Department 9/13 at 101.00  AAA  2,282,742 
  of Public Social Services, Series 2003, 5.000%, 9/01/28 - AMBAC Insured      
3,100  California State Public Works Board, Lease Revenue Bonds, Department of Health Services, Richmond 11/15 at 100.00  AAA  3,186,552 
  Lab, Series 2005B, 5.000%, 11/01/30 - XLCA Insured      
7,035  Corona-Norco Unified School District, Riverside County, California, Special Tax Bonds, Community 9/13 at 100.00  AAA  7,274,260 
  Facilities District 98-1, Series 2003, 5.000%, 9/01/28 - MBIA Insured      
3,145  Culver City Redevelopment Agency, California, Tax Allocation Revenue Bonds, Redevelopment Project, 5/11 at 101.00  AAA  3,256,081 
  Series 2002A, 5.125%, 11/01/25 - MBIA Insured      
8,720  El Monte, California, Senior Lien Certificates of Participation, Department of Public Services 1/11 at 100.00  AAA  8,981,862 
  Facility Phase II, Series 2001, 5.000%, 1/01/21 - AMBAC Insured      
4,000  Folsom Public Financing Authority, California, Special Tax Revenue Bonds, Series 2004A, 5.000%,  9/12 at 102.00  AAA  4,191,760 
  9/01/21 - AMBAC Insured       
355  Hesperia Community Redevelopment Agency, California, Tax Allocation Bonds, Series 2005A, 5.000%,  9/15 at 100.00  AAA  373,879 
  9/01/20 - XLCA Insured       
2,115  Inglewood Redevelopment Agency, California, Tax Allocation Refunding Bonds, Merged Area  No Opt. Call  AAA  2,338,344 
  Redevelopment Project, Series 1998A, 5.250%, 5/01/23 - AMBAC Insured       
3,500  La Quinta Redevelopment Agency, California, Tax Allocation Bonds, Redevelopment Project Area 1,  9/11 at 102.00  AAA  3,606,575 
  Series 2001, 5.100%, 9/01/31 - AMBAC Insured       
3,400  La Quinta Redevelopment Agency, California, Tax Allocation Bonds, Redevelopment Project Area 1,  9/12 at 102.00  AAA  3,552,932 
  Series 2002, 5.000%, 9/01/22 - AMBAC Insured       
1,460  Los Angeles, California, Certificates of Participation, Municipal Improvement Corporation, Series  6/13 at 100.00  AAA  1,491,594 
  2003AW, 5.000%, 6/01/33 - AMBAC Insured       
7,000  Los Angeles, California, Certificates of Participation, Series 2002, 5.200%, 4/01/27 - AMBAC  4/12 at 100.00  AAA  7,274,540 
  Insured       
4,690  Los Angeles County Metropolitan Transportation Authority, California, Proposition C Second Senior  7/08 at 101.00  AAA  4,862,123 
  Lien Sales Tax Revenue Refunding Bonds, Series 1998A, 5.000%, 7/01/23 - AMBAC Insured       
8,470  Ontario Redevelopment Financing Authority, California, Lease Revenue Bonds, Capital Projects,  8/11 at 101.00  AAA  8,888,503 
  Series 2001, 5.200%, 8/01/29 - AMBAC Insured       
5,000  Palm Desert Financing Authority, California, Tax Allocation Revenue Refunding Bonds, Project Area  4/12 at 102.00  AAA  5,166,600 
  1, Series 2002, 5.000%, 4/01/25 - MBIA Insured       
405  Rialto Redevelopment Agency, California, Tax Allocation Bonds, Merged Project Area, Series 2005A,  9/15 at 100.00  AAA  412,326 
  5.000%, 9/01/35 - XLCA Insured       
4,475  Riverside County, California, Asset Leasing Corporate Leasehold Revenue Bonds, Riverside County  6/12 at 101.00  AAA  4,688,905 
  Hospital Project, Series 1997B, 5.000%, 6/01/19 - MBIA Insured       
845  Riverside County Public Financing Authority, California, Tax Allocation Bonds, Multiple Projects,  10/15 at 100.00  AAA  861,723 
  Series 2005A, 5.000%, 10/01/35 - XLCA Insured       
3,175  San Buenaventura, California, Certificates of Participation, Series 2001C, 5.250%, 2/01/31 - AMBAC  2/11 at 101.00  AAA  3,309,525 
  Insured       
3,730  San Diego Redevelopment Agency, California, Subordinate Lien Tax Increment and Parking Revenue  9/09 at 101.00  Baa2  3,843,206 
  Bonds, Centre City Project, Series 2003B, 5.250%, 9/01/26       
4,000  San Jose Financing Authority, California, Lease Revenue Refunding Bonds, Convention Center Project,  9/11 at 100.00  AAA  4,216,760 
  Series 2001F, 5.000%, 9/01/19 - MBIA Insured       
1,000  Shasta Joint Powers Financing Authority, California, Lease Revenue Bonds, County Administration  4/13 at 100.00  AAA  1,058,200 
  Building Project, Series 2003A, 5.250%, 4/01/23 - MBIA Insured       
2,160  Temecula Redevelopment Agency, California, Tax Allocation Revenue Bonds, Redevelopment Project 1,  8/08 at 102.00  AAA  2,249,748 
  Series 2002, 5.125%, 8/01/27 - MBIA Insured       
  Transportation - 5.7% (3.9% of Total Investments)       
2,250  California Infrastructure Economic Development Bank, First Lien Revenue Bonds, San Francisco Bay  7/13 at 100.00  AAA  2,316,443 
  Area Toll Bridge, Series 2003A, 5.000%, 7/01/36 - AMBAC Insured       
7,500  Foothill/Eastern Transportation Corridor Agency, California, Toll Road Revenue Refunding Bonds,  1/14 at 101.00  BBB-  6,370,125 
  Series 1999, 0.000%, 1/15/29       
  San Francisco Airports Commission, California, Revenue Bonds, San Francisco International Airport,       
  Second Series 2003, Issue 29A:       
2,185  5.250%, 5/01/16 (Alternative Minimum Tax) - FGIC Insured  5/13 at 100.00  AAA  2,316,297 
2,300  5.250%, 5/01/17 (Alternative Minimum Tax) - FGIC Insured  5/13 at 100.00  AAA  2,432,227 
  U.S. Guaranteed*** - 12.2% (8.2% of Total Investments)      
  California Health Facilities Financing Authority, Revenue Bonds, Cedars-Sinai Medical Center,      
  Series 1999A:      
2,500  6.125%, 12/01/30 (Pre-refunded to 12/01/09) 12/09 at 101.00  A3***  2,775,275 
2,250  6.250%, 12/01/34 (Pre-refunded to 12/01/09) 12/09 at 101.00  A3***  2,508,187 
6,000  California Department of Water Resources, Power Supply Revenue Bonds, Series 2002A, 5.125%, 5/12 at 101.00  A2***  6,531,120 
  5/01/18 (Pre-refunded to 5/01/12)      
2,070  Fresno Unified School District, Fresno County, California, General Obligation Bonds, Series 2002G, 8/10 at 102.00  AAA  2,158,720 
  5.125%, 8/01/26 - FSA Insured      
  Fresno Unified School District, Fresno County, California, General Obligation Bonds, Series 2002B:      
1,135  5.125%, 8/01/23 - FGIC Insured 8/10 at 102.00  AAA  1,193,680 
1,190  5.125%, 8/01/24 - FGIC Insured 8/10 at 102.00  AAA  1,248,013 
1,245  5.125%, 8/01/25 - FGIC Insured 8/10 at 102.00  AAA  1,302,021 
1,255  5.125%, 8/01/26 - FGIC Insured 8/10 at 102.00  AAA  1,312,479 
3,300  Peralta Community College District, Alameda County, California, General Obligation Bonds, Election 8/09 at 102.00  AAA  3,550,536 
  of 2000, Series 2001A, 5.000%, 8/01/31 (Pre-refunded to 8/01/09) - FGIC Insured      
2,980  Santa Clarita Community College District, Los Angeles County, California, General Obligation Bonds, 8/11 at 101.00  AAA  3,247,395 
  Series 2002, 5.125%, 8/01/26 (Pre-refunded to 8/01/11) - FGIC Insured      
2,460  Vacaville Unified School District, Solano County, California, General Obligation Bonds, Series 8/11 at 101.00  AAA  2,665,066 
  2002, 5.000%, 8/01/26 (Pre-refunded to 8/01/11) - FSA Insured      
  Utilities - 17.0% (11.5% of Total Investments)      
9,000  Anaheim Public Finance Authority, California, Revenue Bonds, Electric System Distribution 10/12 at 100.00  AAA  9,264,420 
  Facilities, Series 2002A, 5.000%, 10/01/27 - FSA Insured      
10,000  California Pollution Control Financing Authority, Remarketed Revenue Bonds, Pacific Gas and 4/11 at 102.00  AAA  10,612,000 
  Electric Company, Series 1996A, 5.350%, 12/01/16 (Alternative Minimum Tax) - MBIA Insured      
3,000  Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Series 2001A-1, 7/11 at 100.00  AAA  3,186,720 
  5.250%, 7/01/21 - FSA Insured      
775  Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Series 2003A-2, 7/13 at 100.00  AAA  818,191 
  5.000%, 7/01/21 - MBIA Insured      
830  Merced Irrigation District, California, Electric System Revenue Bonds, Series 2005, 5.125%, 9/15 at 100.00  AAA  858,926 
  9/01/31 - XLCA Insured      
6,000  Northern California Power Agency, Revenue Refunding Bonds, Hydroelectric Project 1, Series 1998A, 7/08 at 101.00  AAA  6,273,480 
  5.200%, 7/01/32 - MBIA Insured      
3,000  Sacramento Municipal Utility District, California, Electric Revenue Bonds, Series 2001N, 5.000%, 8/11 at 100.00  AAA  3,084,450 
  8/15/28 - MBIA Insured      
5,630  Southern California Public Power Authority, Subordinate Revenue Refunding Bonds, Transmission 7/12 at 100.00  AAA  5,781,897 
  Project, Series 2002A, 4.750%, 7/01/19 - FSA Insured      
  Water and Sewer - 16.6% (11.2% of Total Investments)      
3,000  California Department of Water Resources, Water System Revenue Bonds, Central Valley Project, 12/12 at 100.00  AAA  3,192,510 
  Series 2002X, 5.150%, 12/01/23 - FGIC Insured      
6,100  East Bay Municipal Utility District, Alameda and Contra Costa Counties, California, Water System 6/11 at 100.00  AAA  6,278,669 
  Subordinated Revenue Bonds, Series 2001, 5.000%, 6/01/26 - MBIA Insured      
9,000  Eastern Municipal Water District, California, Water and Sewerage System Revenue Certificates of 7/11 at 100.00  AAA  9,168,570 
  Participation, Series 2001B, 5.000%, 7/01/30 - FGIC Insured      
4,500  Los Angeles County Sanitation Districts Financing Authority, California, Senior Revenue Bonds, 10/13 at 100.00  AAA  4,734,630 
  Capital Projects, Series 2003A, 5.000%, 10/01/23 - FSA Insured      
3,205  Manteca Financing Authority, California, Sewerage Revenue Bonds, Series 2003B, 5.000%, 12/01/33 - 12/13 at 100.00  Aaa  3,229,582 
  MBIA Insured      
9,185  Orange County Sanitation District, California, Certificates of Participation, Series 2003, 5.000%, 8/13 at 100.00  AAA  9,374,946
  2/01/33 - FGIC Insured    
  Semitropic Water Storage District, Kern County, California, Water Banking Revenue Bonds, Series    
  2004A:    
1,315  5.500%, 12/01/20 - XLCA Insured 12/14 at 100.00  AAA  1,436,386
1,415  5.500%, 12/01/21 - XLCA Insured 12/14 at 100.00  AAA  1,543,411
$ 333,300  Total Long-Term Investments (cost $329,275,361) - 148.2%     347,566,202
  Other Assets Less Liabilities - 2.1%     4,902,775
  Preferred Shares, at Liquidation Value - (50.3)%     (118,000,000)
  Net Assets Applicable to Common Shares - 100%     $ 234,468,977

Forward Swaps outstanding at November 30, 2005:

    Fixed Rate Fixed Rate  Floating Rate  Floating Rate      Unrealized 
  Notional  Paid by the Fund Payment  Received by the Fund  Payment  Effective   Termination Appreciation 
Counterparty  Amount  (annualized) Frequency  Based On  Frequency    Date(2)      (Depreciation) 
Citigroup  $ 5,000,000  4.699% Semi-annually    3-month USD-LIBOR    Quarterly  2/27/06    2/27/26  $ 321,527 
JPMorgan  5,500,000  4.833% Semi-annually  3-month USD-LIBOR  Quarterly  2/09/06   2/09/36  344,747 
Morgan Stanley  5,200,000  4.816% Semi-annually  3-month USD-LIBOR  Quarterly  2/15/06   2/15/36  341,165 
              $ 1,007,439 

USD-LIBOR (United States Dollar-London Inter-Bank Offered Rates)

At least 80% of the Fund’s net assets (including net assets attributable to Preferred shares) are invested in municipal securities that are either covered by Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance which ensures the timely payment of principal and interest. Up to 20% of the Fund’s net assets (including net assets attributable to Preferred shares) may be invested in municipal securities that are (i) either backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities (also ensuring the timely payment of principal and interest), or (ii) rated, at the time of investment, within the four highest grades (Baa or BBB or better by Moody’s, S&P or Fitch) or unrated but judged to be of comparable quality by the Adviser.

(1)      All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares unless otherwise noted.
 
(2)    Effective date represents the date on which both the Fund and counterparty commence interest payment accruals on each forward swap contract.
 
* 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.
 
** Ratings: Using the higher of Standard & Poor's or Moody's rating.
 
*** Securities are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities which ensures the timely payment of principal and interest. Such securities are normally considered to be equivalent to AAA rated securities.
 

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 and timing differences in recognizing certain gains and losses on investment transactions.

At November 30, 2005, the cost of investments was $331,343,686.

Gross unrealized appreciation and gross unrealized depreciation of investments at November 30, 2005, were as follows:

Gross unrealized:   
 Appreciation  $ 18,547,661  
 Depreciation  (2,325,145 ) 
Net unrealized appreciation (depreciation) of investments  $ 16,222,516  

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: 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 Insured California Dividend Advantage Municipal Fund        

By (Signature and Title)*          /s/ Jessica R. Droeger                     
                                                    Jessica R. Droeger
                                                    Vice President and Secretary

Date         1/27/06        

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         1/27/06        

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

Date         1/27/06        

* Print the name and title of each signing officer under his or her signature.