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UNITEDSTATES
SECURITIESANDEXCHANGECOMMISSION
Washington,D.C.20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-06692

Name of Fund: BlackRock MuniYield California Insured Fund, Inc. (MCA)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Donald C. Burke, Chief Executive Officer, BlackRock
MuniYield California Insured Fund, Inc., 800 Scudders Mill Road, Plainsboro, NJ, 08536.
Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 07/31/2009

Date of reporting period: 04/30/2009

Item 1 – Schedule of Investments

BlackRock MuniYield California Insured Fund, Inc.     
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
    Par   
  Municipal Bonds  (000)         Value 
California - 117.3%       
County/City/Special  Alameda, California, GO, 5%, 8/01/33 (a)  $ 2,350  $ 2,333,479 
District/School  Alameda County, California, Joint Powers Authority, Lease   
District - 64.8%  Revenue Refunding Bonds, 5%, 12/01/34 (b)  2,960  2,781,068 
  Banning, California, Unified School District, GO (Election of   
  2006), Series B, 5.25%, 8/01/33 (c)  4,300  4,312,126 
  Bay Area Government Association, California, Tax Allocation   
  Revenue Refunding Bonds (California Redevelopment Agency   
  Pool), Series A, 6%, 12/15/24 (b)  255  255,898 
  Brentwood, California, Infrastructure Refinancing Authority,   
  Infrastructure Revenue Refunding Bonds, Series A, 5.20%,   
  9/02/29 (b)  3,980  3,986,607 
  Central Unified School District, California, GO (Election of   
  2008), Series A, 5.50%, 8/01/29 (c)  2,000  2,076,680 
  Chabot-Las Positas, California, Community College District, GO   
  (Election of 2004), Series B, 5.169%, 8/01/26 (d)(e)  6,705  2,397,775 
  Chino Valley, California, Unified School District, GO (Election   
  of 2002), Series C, 5.25%, 8/01/30 (a)  3,000  2,984,550 
  Chula Vista, California, Elementary School District, COP, 5%,   
  9/01/29 (a)  3,910  3,375,581 
  Coachella Valley, California, Unified School District, GO   
  (Election of 2005), Series A, 5%, 8/01/25 (a)(f)  3,275  3,295,698 
  Corona, California, COP (Clearwater Cogeneration Project), 5%,   
  9/01/28 (a)  6,000  5,200,920 
  Fremont, California, Unified School District, Alameda County,   
  GO, Series A, 5.50%, 8/01/26 (a)(f)  10,755  10,999,138 
  Fresno, California, Joint Powers Financing Authority, Lease   
  Revenue Bonds, Series A, 5.75%, 6/01/26 (b)  3,295  3,368,742 
  Fullerton, California, Public Financing Authority, Tax Allocation   
  Revenue Bonds, 5%, 9/01/27 (d)  6,930  5,998,608 
  Glendora, California, Unified School District, GO (Election of   
  2005), Series A, 5%, 8/01/27 (a)  1,350  1,337,148 
  Glendora, California, Unified School District, GO (Election of   
  2005), Series A, 5.25%, 8/01/30 (a)  2,700  2,730,591 
  Hemet, California, Unified School District, GO, Series B,   
  5.125%, 8/01/37 (c)  4,500  4,397,805 
  Imperial, California, Community College District, GO (Election   
  of 2004), 5%, 8/01/29 (a)(f)  3,090  3,001,626 
Portfolio Abbreviations     

To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of
many of the securities have been abbreviated according to the list below.

AMT  Alternative Minimum Tax (subject to)  S/F  Single-Family 
COP  Certificates of Participation  VRDN  Variable Rate Demand Notes 
GO  General Obligation Bonds     

1

BlackRock MuniYield California Insured Fund, Inc.       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
       Par   
                                                         Municipal Bonds    (000)         Value 
                                                         Kern County, California, COP (Capital Improvements Projects),     
                                                         Series A, 6%, 8/01/35 (c)    $ 2,000  $ 2,088,320 
                                                         Lodi, California, Unified School District, GO (Election of 2002),     
                                                         5%, 8/01/29 (b)    10,260  10,174,021 
                                                         Los Angeles, California, Community College District, GO,     
                                                         Refunding (Election of 2008), Series A, 6%, 8/01/33    9,600  10,258,560 
                                                         Los Angeles, California, Community Redevelopment Agency,     
                                                         Community Redevelopment Financing Authority Revenue Bonds (Bunker     
                                                         Hill Project), Series A, 5%, 12/01/27 (b)    10,000  9,433,200 
                                                         Los Angeles, California, Unified School District, GO (Election of     
                                                         2002), Series C, 5%, 7/01/32 (b)    10,000  9,771,200 
                                                         Los Angeles, California, Unified School District, GO (Election of     
                                                         2004), Series C, 5%, 7/01/27 (f)    2,880  2,887,603 
                                                         Los Angeles, California, Unified School District, GO (Election of     
                                                         2004), Series F, 5%, 7/01/30 (f)    5,000  4,922,650 
                                                         Los Angeles, California, Unified School District, GO, Series I, 5%,     
                                                         1/01/34    5,000  4,814,450 
                                                         Los Angeles County, California, Metropolitan Transportation Authority,     
                                                         Sales Tax Revenue Refunding Bonds, Proposition A, First Tier Senior-     
                                                         Series A, 5%, 7/01/27 (d)    5,240  5,328,608 
                                                         Los Angeles County, California, Metropolitan Transportation Authority,     
                                                         Sales Tax Revenue Refunding Bonds, Proposition A, First Tier Senior-     
                                                         Series A, 5%, 7/01/35 (d)    6,500  6,387,745 
                                                         Los Angeles County, California, Public Works Financing     
                                                         Authority, Lease Revenue Refunding Bonds (Master Refunding     
                                                         Project), Series A, 5%, 12/01/28 (a)    6,000  5,501,340 
                                                         Los Rios, California, Community College District, GO (Election     
                                                         of 2002), Series B, 5%, 8/01/27 (a)    3,000  3,060,840 
                                                         Merced, California, Community College District, GO (School     
                                                         Facilities District Number 1), 5%, 8/01/31 (a)    6,865  6,554,015 
                                                         Murrieta Valley, California, Unified School District, Public     
                                                         Financing Authority, Special Tax Revenue Bonds, Series A,     
                                                         5.125%, 9/01/26 (c)    8,000  7,985,760 
                                                         Natomas Unified School District, California, GO (Election of     
                                                         2006), 5%, 8/01/28 (a)(f)    6,015  5,890,790 
                                                         Oxnard, California, Unified High School District, GO, Refunding,     
                                                         Series A, 6.20%, 8/01/30 (a)    9,645  9,907,440 
                                                         Peralta, California, Community College District, GO (Election of     
                                                         2007), Series B, 5%, 8/01/37 (b)    6,695  6,420,840 
                                                         Poway, California, Unified School District, School Facilities     
                                                         Improvement, GO (Election of 2002), Series 1-B, 5%, 8/01/30 (b)  10,000  9,908,800 
                                                         Redlands, California, Unified School District, GO (Election of     
                                                         2008), 5.25%, 7/01/33 (b)    5,000  5,014,050 
                                                         Riverside, California, COP, 5%, 9/01/28 (d)    3,000  2,812,380 
                                                         Riverside, California, Unified School District, GO (Election of     
                                                         2001), Series A, 5.25%, 2/01/23 (a)(f)    6,000  6,145,020 

2

BlackRock MuniYield California Insured Fund, Inc.       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
       Par   
                                                         Municipal Bonds    (000)         Value 
                                                         Riverside, California, Unified School District, GO, Series C, 5%,     
                                                         8/01/32 (c)    $ 5,010  $ 4,895,121 
                                                         Sacramento, California, City Financing Authority, Capital     
                                                         Improvement Revenue Bonds (Community Rein Capital     
                                                         Program), Series A, 5%, 12/01/36 (d)    3,000  2,929,650 
                                                         Sacramento, California, City Financing Authority, Tax     
                                                         Allocation Revenue Bonds (Merged Downtown and Oak Park     
                                                         Projects), Series A, 5.039%, 12/01/32 (a)(e)(f)    6,590  1,135,852 
                                                         Saddleback Valley, California, Unified School District, GO, 5%,     
                                                         8/01/29 (b)    2,565  2,567,155 
                                                         San Bernardino, California, City Unified School District, GO,     
                                                         Series A, 5%, 8/01/28 (b)    5,000  5,020,250 
                                                         San Diego, California, Redevelopment Agency, Subordinate Tax     
                                                         Allocation Bonds (Centre City Redevelopment Project), Series     
                                                         A, 5.25%, 9/01/24 (d)    2,720  2,611,037 
                                                         San Diego, California, Redevelopment Agency, Subordinate Tax     
                                                         Allocation Bonds (Centre City Redevelopment Project), Series     
                                                         A, 5.25%, 9/01/25 (d)    2,860  2,709,593 
                                                         San Francisco, California, Bay Area Rapid Transit District, Sales Tax     
                                                         Revenue Refunding Bonds, Series A, 5%, 7/01/34 (a)    10,500  10,278,450 
                                                         San Jose, California, Financing Authority, Lease Revenue Refunding     
                                                         Bonds (Civic Center Project), Series B, 5%, 6/01/32 (d)  11,400  11,215,434 
                                                         San Jose, California, GO (Libraries, Parks and Public Safety     
                                                         Projects), 5%, 9/01/27 (a)    7,910  8,010,932 
                                                         San Jose, California, Redevelopment Agency, Tax Allocation     
                                                         Bonds (Housing Set-Aside Merged Area), AMT, Series E, 5.85%,     
                                                         8/01/27 (a)    7,300  7,194,661 
                                                         San Juan, California, Unified School District, GO (Election of     
                                                         2002), 5%, 8/01/28 (a)    4,250  4,162,238 
                                                         San Mateo County, California, Transit District, Sales Tax     
                                                         Revenue Refunding Bonds, Series A, 5%, 6/01/29 (a)    4,350  4,418,208 
                                                         Santa Rosa, California, High School District, GO (Election of     
                                                         2002), 5%, 8/01/28 (a)    2,500  2,448,375 
                                                         South Tahoe, California, Joint Powers Financing Authority,     
                                                         Revenue Refunding Bonds (South Tahoe Redevelopment Project     
                                                         Area Number 1), Series A, 5%, 10/01/29 (b)    1,645  1,596,390 
                                                         Ventura County, California, Community College District, GO,     
                                                         Refunding, Series A, 5%, 8/01/27 (a)    3,395  3,429,697 
                                                         Vista, California, COP (Community Projects), 5%, 5/01/37 (a)  6,750  5,839,898 
                                                         Vista, California, Unified School District, GO, Series B, 5%,     
                                                         8/01/28 (a)(f)    2,550  2,497,343 
                                                         West Contra Costa, California, Unified School District, GO     
                                                         (Election of 2002), Series B, 5%, 8/01/32 (b)    6,690  6,536,598 
                                                         West Contra Costa, California, Unified School District, GO     
                                                         (Election of 2005), Series B, 5.625%, 8/01/35 (g)    3,750  3,913,125 
 
 
3

BlackRock MuniYield California Insured Fund, Inc.       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
         Par   
  Municipal Bonds    (000)         Value 
  Westminster, California, Redevelopment Agency, Westminster     
  Commercial Redevelopment Project Number 1, Subordinate Tax     
  Allocation Bonds (Police Facility), 6.25%, 11/01/39 (c)  $ 4,300  $ 4,510,270 
        298,021,949 
Education - 6.2%  California Educational Facilities Authority Revenue Bonds     
  (University of San Diego), Series A, 5.50%, 10/01/32    5,000  5,024,450 
  California Educational Facilities Authority, Student Loan Revenue Bonds     
  (CalEdge Loan Program), AMT, 5.55%, 4/01/28 (d)    6,870  6,500,463 
  San Diego County, California, COP (Salk Institute for Bio     
  Studies), 5.75%, 7/01/31 (a)    5,200  5,204,004 
  University of California Revenue Bonds, Series O, 5.75%, 5/15/34  11,200  11,739,392 
        28,468,309 
Health - 3.8%  California Statewide Communities Development Authority,     
  Health Facility Revenue Bonds (Memorial Health Services),     
  Series A, 6%, 10/01/23    3,685  3,739,906 
  California Statewide Communities Development Authority     
  Revenue Bonds (Adventist), Series B, 5%, 3/01/37 (c)  5,850  5,342,161 
  California Statewide Communities Development Authority     
  Revenue Bonds (Sutter Health), Series D, 5.05%, 8/15/38 (b)  7,925  7,441,099 
  California Statewide Communities Development Authority, Revenue     
  Refunding Bonds (Kaiser Permanente), Series A, 5%, 4/01/31  900  775,305 
        17,298,471 
Housing - 2.5%  California Rural Home Mortgage Finance Authority, S/F     
  Mortgage Revenue Bonds (Mortgage-Backed Securities     
  Program), AMT, Series A, 6.35%, 12/01/29 (h)(i)(j)    210  215,891 
  California Rural Home Mortgage Finance Authority, S/F     
  Mortgage Revenue Bonds (Mortgage-Backed Securities     
  Program), AMT, Series B, 6.25%, 12/01/31 (i)(j)    95  95,828 
  California State Department of Veteran Affairs, Home Purchase     
  Revenue Refunding Bonds, Series A, 5.35%, 12/01/27 (d)  10,755  10,832,866 
  San Bernardino County, California, S/F Home Mortgage Revenue     
  Refunding Bonds, AMT, Series A-1, 6.25%, 12/01/31 (i)(j)  155  159,895 
        11,304,480 
State - 5.6%  California State, GO, 6.25%, 10/01/19 (a)    860  866,407 
  California State, GO, 6.50%, 4/01/33    16,000  17,478,560 
  California State Public Works Board, Lease Revenue Bonds     
  (Department of Education - Riverside Campus Project),     
  Series B, 6.50%, 4/01/34    3,500  3,631,040 
  California State Public Works Board, Lease Revenue Bonds     
  (Various University Projects), Series D, 5%, 5/01/26 (a)  4,000  4,028,840 
        26,004,847 
Transportation -  Port of Oakland, California, Revenue Bonds, AMT, Series K,     
11.0%  5.875%, 5/01/10 (a)(f)(k)    20  20,900 
  Port of Oakland, California, Revenue Bonds, AMT, Series K,     
  5.875%, 11/01/17 (a)(f)    2,725  2,733,802 
  Port of Oakland, California, Revenue Bonds, AMT, Series K,     
  5.75%, 11/01/29 (a)(f)    7,445  6,693,204 

4

BlackRock MuniYield California Insured Fund, Inc.       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
  Municipal Bonds    (000)       Value 
  Port of Oakland, California, Revenue Refunding Bonds, AMT,     
  Series L, 5.375%, 11/01/27 (a)(f)    $ 19,040  $ 16,660,952 
  San Diego, California, Unified Port District, Revenue Refunding     
  Bonds, AMT, Series A, 5.25%, 9/01/19 (a)    5,400  5,297,130 
  San Francisco, California, City and County Airport Commission,     
  International Airport Revenue Refunding Bonds, AMT, Second     
  Series, 6.75%, 5/01/19    4,420  4,616,513 
  San Francisco, California, City and County Airport Commission,     
  International Airport Revenue Refunding Bonds, AMT, Second     
  Series, Issue 34E, 5.75%, 5/01/24 (b)    5,000  5,102,050 
  San Francisco, California, City and County Airport Commission,     
  International Airport Revenue Refunding Bonds, AMT, Second     
  Series, Issue 34E, 5.75%, 5/01/25 (b)    3,500  3,549,070 
  San Francisco, California, City and County Airport Commission,     
  International Airport, Special Facilities Lease Revenue Bonds (SFO Fuel     
  Company LLC), AMT, Series A, 6.10%, 1/01/20 (b)    1,000  1,004,580 
  San Francisco, California, City and County Airport Commission,     
  International Airport, Special Facilities Lease Revenue Bonds (SFO Fuel     
  Company LLC), AMT, Series A, 6.125%, 1/01/27 (b)    985  987,797 
  San Jose, California, Airport Revenue Bonds, Series D, 5%,     
  3/01/28 (a)    4,135  4,050,729 
        50,716,727 
Utilities - 23.4%  Contra Costa, California, Water District, Water Revenue     
  Refunding Bonds, Series L, 5%, 10/01/32 (b)    4,135  4,137,398 
  Contra Costa, California, Water District, Water Revenue     
  Refunding Bonds, Series O, 5%, 10/01/24 (d)    1,735  1,808,148 
  East Bay, California, Municipal Utility District, Wastewater System     
  Revenue Refunding Bonds, Sub-Series A, 5%, 6/01/33 (d)  4,000  4,005,080 
  East Bay, California, Municipal Utility District, Wastewater System     
  Revenue Refunding Bonds, Sub-Series A, 5%, 6/01/37 (d)  7,985  7,913,215 
  East Bay, California, Municipal Utility District, Water System     
  Revenue Refunding Bonds, Series A, 5%, 6/01/37 (a)(f)  6,000  5,866,860 
  East Bay Municipal Utility District, California, Water System     
  Revenue Bonds, Sub-Series A, 5%, 6/01/35 (a)    15,000  14,763,000 
  El Centro, California, Financing Authority, Water Revenue     
  Bonds, Series A, 5.25%, 10/01/35 (b)    1,100  1,067,836 
  Glendale, California, Electric Revenue Bonds, 5%, 2/01/32 (a)  4,390  4,244,910 
  Hollister, California, Joint Powers Finance Authority,     
  Wastewater Revenue Refunding Bonds (Refining and       
  Improvement Project), Series 1, 5%, 6/01/32 (b)    5,000  4,506,050 
  Hollister, California, Joint Powers Finance Authority,     
  Wastewater Revenue Refunding Bonds (Refining and       
  Improvement Project), Series 1, 5%, 6/01/37 (b)    6,000  5,285,520 
  Los Angeles, California, Water and Power Revenue Bonds     
  (Power System), Sub-Series A-1, 5%, 7/01/37 (d)    5,000  4,881,500 

5

BlackRock MuniYield California Insured Fund, Inc.         
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
         Par     
  Municipal Bonds    (000)    Value 
  Madera, California, Public Financing Authority, Water and       
  Wastewater Revenue Refunding Bonds, 5%, 3/01/36 (a)  $ 2,010  $  1,924,032 
  Metropolitan Water District of Southern California, Waterworks       
  Revenue Bonds, Series B-1, 5%, 10/01/33 (a)(f)    7,175    7,211,377 
  Napa, California, Water Revenue Bonds, 5%, 5/01/35 (d)  9,070    8,700,670 
  Oakland, California, Sewer Revenue Bonds, Series A, 5%, 6/15/29 (b)  4,270    4,267,054 
  Oxnard, California, Financing Authority, Wastewater Revenue Bonds       
  (Redwood Trunk Sewer and Headworks Projects), Series A, 5.25%,       
  6/01/34 (a)(f)    10,000    9,958,100 
  Sacramento, California, Municipal Utility District Financing Authority       
  Revenue Bonds (Consumers Project), 5%, 7/01/21 (a)  4,500    4,064,355 
  Santa Clara, California, Subordinated Electric Revenue Bonds,       
  Series A, 5%, 7/01/28 (a)    5,500    5,426,245 
  Stockton, California, Public Financing Authority, Water       
  Revenue Bonds (Water System Capital Improvement         
  Projects), Series A, 5%, 10/01/31 (a)    2,600    2,511,496 
  Turlock, California, Public Finance Authority, Sewer Revenue       
  Bonds, Series A, 5%, 9/15/33 (a)(f)    3,000    2,966,490 
  Vallecitos Water District and Wastewater Enterprise,       
  California, COP, Refunding, Series A, 5%, 7/01/27 (b)  2,000    2,030,700 
          107,540,036 
  Total Municipal Bonds - 117.3%        539,354,819 
  Municipal Bonds Transferred to Tender Option Bond Trusts (l)       
California - 29.0%           
County/City/Special  Fremont, California, Unified School District, Alameda County, GO       
District/School  (Election of 2002), Series B, 5%, 8/01/30 (b)    5,997    5,942,280 
District - 2.9%  Los Angeles, California, Community College District, GO (Election of 2003),     
  Series E, 5%, 8/01/31 (b)    7,497    7,368,313 
          13,310,593 
Education - 2.6%  California State University, Systemwide Revenue Bonds,       
  Series A, 5%, 11/01/39 (b)    4,860    4,683,339 
  University of California Revenue Bonds, Series L, 5%, 5/15/40  7,398    7,105,084 
          11,788,423 
Transportation -  Long Beach, California, Harbor Revenue Bonds, AMT, Series A,       
7.3%  5.375%, 5/15/24    15,150    14,311,751 
  San Francisco, California, Bay Area Rapid Transit District, Sales       
  Tax Revenue Refunding Bonds, Series A, 5%, 7/01/30 (a)  19,630    19,639,030 
          33,950,781 
Utilities - 16.2%  Anaheim, California, Public Financing Authority, Electric System       
  Distribution Facilities Revenue Bonds, Series A, 5%, 10/01/31 (b)  3,568    3,511,268 
  Los Angeles, California, Department of Water and Power, Power       
  System Revenue Refunding Bonds, Series A, Sub-Series A-2,       
  5%, 7/01/27 (a)    16,000    15,923,360 
  Los Angeles, California, Water and Power Revenue Bonds (Power System),     
  Sub-Series A-1, 5.125%, 7/01/31 (b)    5,008    4,960,752 
  Metropolitan Water District of Southern California, Waterworks       
  Revenue Bonds, Series A, 5%, 7/01/37    15,000    15,169,500 

6

BlackRock MuniYield California Insured Fund, Inc.       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
  Municipal Bonds Transferred to Tender Option Bond Trusts (l)  (000)             Value 
  Rancho, California, Water District Financing Authority, Revenue     
  Refunding Bonds, Series A, 5%, 8/01/34 (b)    $ 9,277  $ 9,171,053 
  San Diego County, California, Water Authority, Water Revenue Bonds,     
  COP, Series A, 5%, 5/01/30 (b)    7,350  7,353,748 
  San Diego County, California, Water Authority, Water Revenue Bonds,     
  COP, Series A, 5%, 5/01/31 (b)    10,000  9,934,000 
  San Diego County, California, Water Authority, Water Revenue Refunding     
  Bonds, COP, Series A, 5%, 5/01/33 (b)    8,510  8,369,840 
        74,393,521 
  Total Municipal Bonds Transferred to Tender Option Bond Trusts - 29.0%  133,443,318 
  Total Long-Term Investments (Cost - $696,952,171) - 146.3%    672,798,137 
  Short-Term Securities       
California -  Los Angeles County, California, Metropolitan Transportation Authority,     
2.8%  Sales Tax Revenue Refunding Bonds, Proposition C, VRDN, Second     
  Senior Series A, 6%, 5/07/09 (a)(m)    13,000  13,000,000 
      Shares   
Money Market  CMA California Municipal Money Fund, 0.26% (n)(o)    8,236,924  8,236,924 
Fund - 1.8%         
  Total Short-Term Securities (Cost - $21,236,924) - 4.6%    21,236,924 
  Total Investments (Cost - $718,189,095*) - 150.9%    694,035,061 
  Other Assets Less Liabilities - 6.7%      30,874,579 
  Liability for Trust Certificates, Including Interest Expense and     
  Fees Payable - (15.8)%      (72,720,824) 
  Preferred Shares, at Redemption Value - (41.8)%      (192,342,808) 
  Net Assets Applicable to Common Shares - 100.0%      $ 459,846,008 

* The cost and unrealized appreciation (depreciation) of investments as of April 30, 2009, as

computed for federal income tax purposes, were as follows:

Aggregate cost  $  641,838,849 
Gross unrealized appreciation  $  4,816,000 
Gross unrealized depreciation    (25,139,611) 
Net unrealized depreciation  $  (20,323,611) 

(a) NPFGC Insured.
(b) FSA Insured.
(c) Assured Guaranty Insured.
(d) AMBAC Insured.
(e) Represents a zero-coupon bond. Rate shown is the effective yield at the time or purchase.
(f) FGIC Insured.
(g) BHAC Insured.
(h) FHLMC Collateralized.
(i) FNMA Collateralized.
(j) GNMA Collateralized.
(k) US government securities, held in escrow, are used to pay interest on this security as well as to retire the bond in full
at the date indicated, typically at a premium to par.

7

BlackRock MuniYield California Insured Fund, Inc.
Schedule of Investments April 30, 2009 (Unaudited)

(l) Securities represent bonds transferred to a tender option bond trust in exchange for which the Fund acquired
residual interest certificates. These securities serve as collateral in a financing transaction.
(m) Rate shown is as of report date and maturity shown is the final maturity date or the date the principal
owed can be recovered through demand.

(n) Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment
Company Act of 1940, were as follows:

Affiliate  Net Activity    Income 
CMA California Municipal Money Fund             8,030,671  $       134,720 

(o) Represents the current yield as of report date.

Ÿ Effective August 1, 2008, the Fund adopted Financial Accounting Standards Board Statement of Financial Accounting
Standards No. 157, "Fair Value Measurements" ("FAS 157"). FAS 157 clarifies the definition of fair value, establishes a
framework for measuring fair values and requires additional disclosures about the use of fair value measurements.
Various inputs are used in determining the fair value of investments, which are as follows:

Ÿ Level 1 - price quotations in active markets/exchanges for identical securities
Ÿ Level 2 - other observable inputs (including, but not limited to: quoted prices for similar assets
or liabilities in markets that are active, quoted prices for identical or similar assets in markets
that are not active, inputs other than quoted prices that are observable for the assets or
liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities,
credit risks and default rates) or other market-corroborated inputs)

Ÿ Level 3 - unobservable inputs based on the best information available in the circumstance, to
the extent observable inputs are not available (including the Fund's own assumption used in
determining the fair value of investments)

The inputs or methodology used for valuing securities are not necessarily an indication of the risk
associated with investing in those securities. For information about the Fund's policy regarding
valuation of investments and other significant accounting policies, please refer to the Fund's most
recent financial statements as contained in its semi-annual report.

The following table summarizes the inputs used as of April 30, 2009 in determining the fair valuation
of the Fund's investments:

Valuation    Investments in 
Inputs    Securities 
             Assets 
Level 1  $  8,236,924 
Level 2    685,798,137 
Level 3    - 
Total  $  694,035,061 

8

Item 2 – Controls and Procedures

2(a) – 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”)) are effective as of a date within 90 days of the filing of this report based on the
evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act
and Rule 13(a)-15(b) under the Securities Exchange Act of 1934, as amended.

2(b) – There were no changes in the registrant’s internal control over financial reporting (as
defined in Rule 30a-3(d) under the 1940 Act) 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

Certifications – Attached hereto

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.

BlackRock MuniYield California Insured Fund, Inc.

By: /s/ Donald C. Burke
Donald C. Burke
Chief Executive Officer of
BlackRock MuniYield California Insured Fund, Inc.

Date: June 19, 2009

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/ Donald C. Burke
Donald C. Burke
Chief Executive Officer (principal executive officer) of
BlackRock MuniYield California Insured Fund, Inc.

Date: June 19, 2009

By: /s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock MuniYield California Insured Fund, Inc.

Date: June 19, 2009