UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-PX

                     ANNUAL REPORT OF PROXY VOTING RECORD OF
                   REGISTERED MANAGEMENT INVESTMENT COMPANIES

                   Investment Company Act file number 811-9537

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                      MFS CALIFORNIA INSURED MUNICIPAL FUND
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               (Exact name of registrant as specified in charter)

                500 Boylston Street, Boston, Massachusetts 02116
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               (Address of principal executive offices) (Zip code)

                                 Susan S. Newton
                    Massachusetts Financial Services Company
                               500 Boylston Street
                           Boston, Massachusetts 02116
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                    (Name and address of agents for service)

       Registrant's telephone number, including area code: (617) 954-5000

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                      Date of fiscal year end: November 30

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             Date of reporting period: July 1, 2008 - June 30, 2009




ITEM 1.  PROXY VOTING RECORD.




****************************** FORM N-Px REPORT ********************************

ICA File Number: 811-09537
Reporting Period: 07/01/2008 - 06/30/2009
MFS California Insured Municipal Fund

==================== MFS CALIFORNIA INSURED MUNICIPAL FUND =====================

There is no proxy voting activity for the fund, as the fund did not hold any
votable positions during the reporting period.

========== END NPX REPORT

                                     Page 1




                                   SIGNATURES

Pursuant to the requirements of 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: MFS CALIFORNIA INSURED MUNICIPAL TRUST

By (Signature and Title)  MARIA F. DWYER*
                          -------------------------------------------
                          Maria F. Dwyer, Principal Executive Officer

Date:  August 26, 2009

*By (Signature and Title)  /s/ Susan S. Newton
                           ------------------------------------------
                           Susan S. Newton, as attorney-in-fact

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*     Executed by Susan S. Newton on behalf of Maria F. Dwyer pursuant to a
      Power of Attorney dated October 27, 2008. (1)

(1)   Incorporated by reference to MFS Series Trust XIII (File Nos. 2-74959 and
      811-3327) Post-Effective Amendment No. 42 filed with the SEC via EDGAR on
      June 25, 2009.