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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 811-06499

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

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock
MuniYield California Fund, Inc., 55 East 52nd Street, New York, NY 10055.

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

Date of fiscal year end: 07/31/2010

Date of reporting period: 04/30/2010

Item 1 – Schedule of Investments


Schedule of Investments April 30, 2010 (Unaudited)

BlackRock MuniYield California Fund, Inc. (MYC)
(Percentages shown are based on Net Assets)

     Par   
Municipal Bonds    (000)  Value 
California — 108.8%       
Corporate — 4.2%       
California Pollution Control Financing       
   Authority, RB, Waste Management Inc.     
   Project, Series C, AMT, 6.75%,       
   12/01/27  $ 3,300  $ 3,381,213 
City of Chula Vista California, Refunding     
   RB, San Diego Gas & Electric,       
   Series A, 5.88%, 2/15/34    975  1,074,801 
University of California, RB, Limited       
   Project, Series B (AGM), 5.00%,       
   5/15/33    8,485  8,611,851 
      13,067,865 
County/City/Special District/School District — 38.4%   
Arcata Joint Powers Financing Authority,     
   California, Tax Allocation Bonds,       
   Refunding, Community Development     
   Project Loan, Series A (AMBAC),       
   6.00%, 8/01/23    2,520  2,521,184 
California State Department of Water       
   Resources, Refunding RB, Water       
   System, Series AF, 5.00%, 12/01/29  2,500  2,687,600 
City of Los Angeles California, COP,       
   Senior, Sonnenblick Del Rio West Los     
   Angeles (AMBAC), 6.20%, 11/01/31  2,000  2,032,480 
City of Los Angeles California, Refunding     
   RB, Series A, 5.00%, 6/01/39    9,870  10,226,899 
El Monte Union High School District,       
   California, GO, Election of 2002,       
   Series C (AGM), 5.25%, 6/01/32    10,120  10,449,204 
Fontana Unified School District,       
   California, GO, Series A (AGM), 5.25%,     
   8/01/28    7,000  7,414,680 
Los Angeles Municipal Improvement       
   Corp., RB, Real Property, Series E:       
       5.75%, 9/01/34    500  531,500 
       6.00%, 9/01/34    1,860  2,029,148 
Marin Community College District, GO,     
   Election of 2004, Series A (NPFGC),     
   5.00%, 8/01/28    5,885  6,068,082 
Modesto Irrigation District, COP,       
   Series B, 5.50%, 7/01/35    3,300  3,484,041 
Morgan Hill Unified School District,       
   California, GO, CAB (FGIC), 5.07%,       
   8/01/26 (a)(b)    7,570  3,785,379 
Murrieta Valley Unified School District,     
   Public Financing Authority, Special Tax     
   Bonds, Refunding, Series A (AGC),       
   5.13%, 9/01/26    6,675  7,022,567 

     Par   
Municipal Bonds    (000)  Value 
California (continued)       
County/City/Special District/School District (continued)   
Oak Grove School District, California,       
   GO, Election of 2008, Series A,       
   5.50%, 8/01/33  $ 4,000  $ 4,274,720 
Orange County Sanitation District, COP     
   (NPFGC), 5.00%, 2/01/33    5,250  5,337,780 
Pico Rivera Public Financing Authority,     
   RB:       
       5.50%, 9/01/31    1,500  1,536,180 
       5.75%, 9/01/39    4,365  4,507,823 
Pittsburg Redevelopment Agency, Tax       
   Allocation Bonds, Refunding,       
   Subordinate, Los Medanos       
   Community Project, Series A, 6.50%,     
   9/01/28    2,500  2,761,850 
San Diego Regional Building Authority,     
   California, RB, County Operations       
   Center & Annex, Series A:       
       5.38%, 2/01/28    150  160,857 
       5.38%, 2/01/36    3,200  3,381,536 
San Francisco Bay Area Transit       
   Financing Authority, Refunding RB,       
   Series A (NPFGC), 5.00%, 7/01/34    5,435  5,531,145 
San Jose Evergreen Community College     
   District, California, GO, Refunding,       
   CAB, Election of 2004, Series A       
   (NPFGC), 5.12%, 9/01/23 (a)    10,005  5,118,558 
San Juan Unified School District,       
   California, GO, Election of 2002       
   (NPFGC), 5.00%, 8/01/28    5,000  5,088,150 
Santa Ana Unified School District, GO,     
   Election of 2008, Series A, 5.13%,       
   8/01/33    5,000  5,167,800 
Santa Cruz County Redevelopment       
   Agency, California, Tax Allocation       
   Bonds, Live Oak/Soquel Community     
   Improvement, Series A:       
       6.63%, 9/01/29    1,000  1,085,760 
       7.00%, 9/01/36    500  554,530 
Twin Rivers Unified School District, GO,     
   Election of 2006 (AGM), 5.00%,       
   8/01/29    9,390  9,580,148 
Vacaville Unified School District,       
   California, GO, Election of 2001       
   (NPFGC), 5.00%, 8/01/30    4,745  4,770,765 
Ventura Unified School District,       
   California, GO, Election of 1997,       
   Series H (AGM), 5.13%, 8/01/34    1,000  1,017,680 

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 following list:

AGC  Assured Guaranty Corp.  FGIC  Financial Guaranty Insurance Co. 
AGM  Assured Guaranty Municipal Corp.  GNMA  Government National Mortgage Association 
AMBAC  American Municipal Bond Assurance Corp.  GO  General Obligation Bonds 
AMT  Alternative Minimum Tax (subject to)  LRB  Lease Revenue Bonds 
CAB  Capital Appreciation Bonds  NPFGC  National Public Finance Guarantee Corp. 
COP  Certificates of Participation  RB  Revenue Bonds 

BLACKROCK MUNIYIELD CALIFORNIA FUND, INC.

APRIL 30, 2010

1


Schedule of Investments (continued)

BlackRock MuniYield California Fund, Inc. (MYC)
(Percentages shown are based on Net Assets)

     Par   
Municipal Bonds    (000)  Value 
California (continued)       
County/City/Special District/School District (concluded)   
Westminster Redevelopment Agency,       
   California, Tax Allocation Bonds,       
   Subordinate, Commercial       
   Redevelopment Project No. 1 (AGC),     
   6.25%, 11/01/39  $ 1,250  $ 1,424,588 
      119,552,634 
Education — 7.7%       
California Educational Facilities       
   Authority, RB, Pitzer College, 6.00%,     
   4/01/40    2,500  2,667,325 
California State Enterprise Development     
   Authority, Refunding RB, The Thacher     
   School Project, 5.13%, 9/01/39    6,965  7,054,779 
California State University, RB,       
   Systemwide, Series A, 5.50%,       
   11/01/39    2,725  2,873,294 
University of California, RB:       
       Limited Project, Series D (NPFGC),     
       5.00%, 5/15/32    2,500  2,559,525 
       Series L, 5.00%, 5/15/36    8,500  8,785,005 
      23,939,928 
Health — 15.2%       
ABAG Finance Authority for Nonprofit       
   Corps, Refunding RB, Sharp       
   Healthcare, 6.38%, 8/01/34    1,750  1,843,730 
California Health Facilities Financing       
   Authority, Refunding RB:       
       Catholic Healthcare West, Series A,     
       6.00%, 7/01/39    10,000  10,719,900 
       Catholic Healthcare West, Series E,     
       5.63%, 7/01/25    6,000  6,399,960 
       Scripps Health, Series A, 5.00%,       
       11/15/36    9,605  9,521,148 
       St. Joseph Health System, Series A,     
       5.50%, 7/01/29    2,100  2,181,018 
California Statewide Communities       
   Development Authority, RB, Health       
   Facility, Memorial Health Services,       
   Series A:       
       6.00%, 10/01/23    3,270  3,411,755 
       5.50%, 10/01/33    3,015  3,060,255 
California Statewide Communities       
   Development Authority, Refunding RB:     
       Catholic Healthcare West, Series D,     
       5.50%, 7/01/31    5,055  5,193,103 
       Senior Living, Southern California,     
       6.25%, 11/15/19    500  539,515 
       Senior Living, Southern California,     
       6.63%, 11/15/24    650  690,807 
       Senior Living, Southern California,     
       7.00%, 11/15/29    500  537,035 
       Senior Living, Southern California,     
       7.25%, 11/15/41    1,750  1,897,840 

     Par   
Municipal Bonds    (000)  Value 
California (continued)       
Health (concluded)       
City of Torrance California, Refunding       
   RB, Torrance Memorial Medical       
   Center, Series A, 6.00%, 6/01/22  $ 1,310  $ 1,350,492 
      47,346,558 
Housing — 1.2%       
California Rural Home Mortgage Finance     
   Authority, RB, AMT:       
       Mortgage-Backed Securities       
       Program, Series B (GNMA), 6.15%,     
       6/01/20    25  25,258 
       Sub-Series FH-1, 5.50%, 8/01/47  415  232,392 
Santa Clara County Housing Authority,     
   California, RB, John Burns Gardens       
   Apartments Project, Series A, AMT,       
   6.00%, 8/01/41    3,500  3,516,310 
      3,773,960 
State — 8.2%       
California State Public Works Board, RB:     
       Department of Developmental       
       Services, Porterville, Series C,       
       6.25%, 4/01/34    1,100  1,164,636 
       Department of Education, Riverside     
       Campus Project, Series B, 6.50%,     
       4/01/34    10,000  10,770,000 
       Trustees of the California State       
       University, Series D, 6.00%,       
       4/01/27    215  223,561 
       Various Capital Projects,       
       Sub-Series I-1, 6.38%, 11/01/34    1,850  1,981,998 
State of California, GO, Various Purpose:     
       6.00%, 3/01/33    5,000  5,503,550 
       6.50%, 4/01/33    5,000  5,668,850 
      25,312,595 
Transportation — 6.3%       
County of Orange California, RB,       
   Series B, 5.75%, 7/01/34    3,000  3,258,990 
County of Sacramento, California, RB,       
   Senior, Series B, 5.75%, 7/01/39    900  967,851 
Los Angeles Department of Airports,       
   Refunding RB, Senior, Los Angeles       
   International Airport, Series A, 5.00%,     
   5/15/40    4,880  4,972,525 
San Francisco City & County Airports       
   Commission, RB, Series E, 6.00%,       
   5/01/39    4,835  5,303,221 
San Francisco Port Commission,       
   California, RB, Series A, 5.13%,       
   3/01/40    5,000  5,005,400 
      19,507,987 

2 BLACKROCK MUNIYIELD CALIFORNIA FUND, INC.

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock MuniYield California Fund, Inc. (MYC)
(Percentages shown are based on Net Assets)

  Par   
Municipal Bonds  (000)             Value 
California (concluded)     
Utilities — 27.6%     
California Infrastructure & Economic     
   Development Bank, RB, California     
   Independent System Operator,     
   Series A, 6.25%, 2/01/39  $ 2,170  $ 2,293,603 
California Statewide Communities     
   Development Authority, RB, Pooled     
   Financing Program, Series C, City of     
   West Sacramento (AGM), 5.25%,     
   10/01/28  2,380  2,422,316 
City of Chula Vista, California, Refunding     
   RB, San Diego Gas & Electric,     
   Series D, 5.88%, 1/01/34  2,500  2,755,900 
Eastern Municipal Water District,     
   California, COP, Series H, 5.00%,     
   7/01/35  7,775  7,994,955 
Los Angeles Department of Water &     
   Power, RB:     
       Power System, Sub-Series A-1     
       (AMBAC), 5.00%, 7/01/37  15,100  15,510,720 
       System, Sub-Series A-2 (AGM),     
       5.00%, 7/01/35  7,250  7,439,007 
Metropolitan Water District of Southern     
   California, RB:     
       Series A, 5.00%, 7/01/32  1,390  1,455,525 
       Series A (AGM), 5.00%, 7/01/30  1,000  1,036,770 
       Series C, 5.00%, 7/01/35  7,145  7,417,010 
Metropolitan Water District of Southern     
   California, Refunding RB:     
       Series B, 5.00%, 7/01/35  2,675  2,776,837 
       Series C, 5.00%, 7/01/31  1,750  1,869,280 
Oxnard Financing Authority, RB,     
   Redwood Trunk Sewer & Headworks,     
   Series A (NPFGC), 5.25%, 6/01/34  4,160  4,190,160 
Sacramento Municipal Utility District,     
   RB, Cosumnes Project (NPFGC),     
   5.13%, 7/01/29  18,500  18,620,250 
Sacramento Regional County Sanitation     
   District, Refunding RB, County     
   Sanitation District 1 (NPFGC), 5.00%,     
   8/01/35  5,675  5,776,810 
San Diego Public Facilities Financing     
   Authority, Refunding RB, Senior     
   Series A, 5.38%, 5/15/34  1,910  2,041,771 
San Francisco City & County Public     
   Utilities Commission, Refunding RB,     
   Series A, 5.13%, 11/01/39  2,295  2,403,117 
    86,004,031 
Total Municipal Bonds in California    338,505,558 

     Par   
Municipal Bonds    (000)  Value 
Puerto Rico — 3.2%       
County/City/Special District/School District — 1.8%   
Puerto Rico Sales Tax Financing Corp.,     
   RB, First Sub-Series A, 6.50%,       
   8/01/44  $ 5,000  $ 5,648,550 
State — 1.4%       
Commonwealth of Puerto Rico, GO,       
   Refunding, Public improvement,       
   Series B, 6.50%, 7/01/37    4,000  4,405,720 
Total Municipal Bonds in Puerto Rico      10,054,270 
 Total Municipal Bonds – 112.0%                                       348,559,828
Municipal Bonds Transferred to Tender     
Option Bond Trusts (c)       
California — 41.3%       
Corporate — 5.8%       
San Francisco Bay Area Rapid Transit       
   District, Refunding RB, Series A       
   (NPFGC), 5.00%, 7/01/30    6,000  6,167,280 
University of California, RB, Series L,       
   5.00%, 5/15/40    11,597  11,894,135 
      18,061,415 
County/City/Special District/School District — 14.3%   
Contra Costa Community College       
   District, California, GO, Election of       
   2002 (AGM), 5.00%, 8/01/30    10,215  10,421,750 
Fremont Unified School District,       
   Alameda County, California, GO,       
   Election of 2002, Series B (AGM),       
   5.00%, 8/01/30    4,003  4,101,120 
Los Angeles Community College District,     
   California, GO, Election of 2008,       
   Series A, 6.00%, 8/01/33    3,828  4,292,727 
San Diego Community College District     
   California, GO, Election of 2002,       
   5.25%, 8/01/33    7,732  8,119,958 
Santa Clara County Financing Authority,     
   Refunding LRB, Series L, 5.25%,       
   5/15/36    10,001  10,461,382 
Sonoma County Junior College District,     
   GO, Refunding, Election of 2002,       
   Series B (AGM), 5.00%, 8/01/28    6,875  7,098,479 
      44,495,416 
Education — 11.3%       
California Educational Facilities       
   Authority, RB, University of Southern     
   California, Series A, 5.25%, 10/01/18  13,845  14,846,270 
California State University, RB,       
   Systemwide, Series A (AGM), 5.00%,     
   11/01/39    4,840  4,894,063 

BLACKROCK MUNIYIELD CALIFORNIA FUND, INC.

APRIL 30, 2010

3


Schedule of Investments (concluded)

BlackRock MuniYield California Fund, Inc. (MYC)
(Percentages shown are based on Net Assets)

Municipal Bonds Transferred to Tender  Par   
Option Bond Trusts (c)  (000)  Value 
California (concluded)     
Education (concluded)     
Los Angeles Community College District,     
   California, GO, Election of 2003,     
   Series E (AGM), 5.00%, 8/01/31  $ 10,002  $ 10,237,933 
Peralta Community College District, GO,     
   Election of 2000, Series D (AGM),     
   5.00%, 8/01/30  1,995  2,043,878 
University of California, RB, Series O,     
   5.75%, 5/15/34  2,805  3,149,426 
    35,171,570 
Utilities — 9.9%     
Eastern Municipal Water District, COP,     
   Series H, 5.00%, 7/01/33  4,748  4,882,312 
Metropolitan Water District of Southern     
   California, RB, Series A, 5.00%,     
   7/01/37  20,000  20,892,400 
San Diego County Water Authority, COP,     
   Series A (AGM), 5.00%, 5/01/31  5,010  5,123,326 
    30,898,038 
Total Municipal Bonds Transferred to     
Tender Option Bond Trusts – 41.3%    128,626,439 
Total Long-Term Investments     
 (Cost – $465,274,902) – 153.3%                                        477,186,267
Short-Term Securities  Shares   
CMA California Municipal Money Fund,     
   0.04% (d)(e)  5,045,201  5,045,201 
Total Short-Term Securities     
(Cost – $5,045,201) – 1.6%    5,045,201 
Total Investments     
(Cost – $470,320,103*) – 154.9%    482,231,468 
Other Assets Less Liabilities –1.7%    5,225,806 
Liability for Trust Certificates, Including Interest   
   Expense and Fees Payable – (22.5)%    (70,188,507) 
Preferred Shares, at Redemption Value – (34.1)%  (105,968,869) 
Net Assets Applicable to Common Shares – 100.0%   $ 311,299,898 

* The cost and unrealized appreciation (depreciation) of investments as of
April 30, 2010, as computed for federal income tax purposes, were as

follows:   
Aggregate cost  $ 400,564,093 
Gross unrealized appreciation  $ 13,759,589 
Gross unrealized depreciation                     (2,228,222) 
Net unrealized appreciation  $ 11,531,367 

(a) Represents a zero-coupon bond. Rate shown reflects the current yield as
of report date.
(b) Security is collateralized by Municipal or US Treasury obligations.
(c) 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.
(d) Investments in companies considered to be an affiliate of the Fund
during the period, for purposes of Section 2(a)(3) of the Investment

Company Act of 1940, were as follows:

  Shares Held    Shares Held   
  at July 31,  Net  at April 30,   
Affiliate  2009  Activity  2010  Income 
CMA California         
   Municipal         
   Money Fund  7,607,697  (2,562,496)  5,045,201  $1,733 

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

• Fair Value Measurements - Various inputs are used in determining the fair

value of investments, which are as follows:

• Level 1 — price quotations in active markets/exchanges for identical
assets and liabilities

• 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 or liabilities 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)

• Level 3 — unobservable inputs based on the best information available
in the circumstances, to the extent observable inputs are not available
(including the Fund's own assumptions used in determining the fair
value of investments)

The inputs or methodologies 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, 2010 in
determining the fair valuation of the Fund's investments:

Investments in Securities

Valuation Inputs        Level 1  Level 2  Level 3  Total 
Assets:         
Long-Term         
Investments1  —           $477,186,267           —   $ 477,186,267 
Short-Term         
Securities  $ 5,045,201                 5,045,201 
Total  $ 5,045,201       $477,186,267             $ 482,231,468 

1 See above Schedule of Investments for values in each sector.

4 BLACKROCK MUNIYIELD CALIFORNIA FUND, INC.

APRIL 30, 2010


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 Fund, Inc.

By: /s/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer of
BlackRock MuniYield California Fund, Inc.

Date: June 28, 2010

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/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer (principal executive officer) of
BlackRock MuniYield California Fund, Inc.

Date: June 28, 2010

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

Date: June 28, 2010