SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    Form 8-K

                Current Report Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported) October 9, 2003



                              SONOMA VALLEY BANCORP
                              ---------------------
             (Exact name of registrant as specified in its charter)


   California                   000-31929                     68-0454068
   ----------                   ---------                     ----------
 (State or other           (Commission File No.)           (I.R.S. Employer
  jurisdiction                                            Identification No.)
of incorporation)



                 202 West Napa Street, Sonoma, California 95476
                 ----------------------------------------------
                    (Address of principal executive offices)

                                 (707) 935-3200
                                 --------------
                         (Registrant's telephone number,
                              including area code)



<PAGE>


Item 7. Financial Statements and Exhibits.

         Exhibit No.          Exhibit Description
         -----------          -------------------

         99                   Press release announcing third quarter results

Item 12. Results of Operations and Financial Condition.

     Sonoma Valley Bancorp announced its results for the third quarter of fiscal
year 2003 on the attached press release.



<PAGE>


                                    SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                            SONOMA VALLEY BANCORP,
                                            a California Corporation


Dated:  October 9, 2003             /s/ Mary Quade Dieter
                                    --------------------------------------------
                                    Mary Quade Dieter,
                                    Executive  Vice  President,  Chief Operating
                                    Officer and Chief Financial Officer
                                    (Principal Financial and Accounting Officer)
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{"company-data": {"conformed-name": "SONOMA VALLEY BANCORP", "cik": "0001120427", "assigned-sic": "6021", "irs-number": "680454068", "state-of-incorporation": "CA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-31929", "film-number": "03935884"}, "business-address": {"street1": "C/O SONOMA VALLEY BANCORP", "street2": "202 WEST NAPA STREET", "city": "SONOMA", "state": "CA", "zip": "95476"}}
SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    Form 8-K

                Current Report Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported) October 9, 2003

                              SONOMA VALLEY BANCORP
                              ---------------------
             (Exact name of registrant as specified in its charter)

   California                   000-31929                     68-0454068
   ----------                   ---------                     ----------
 (State or other           (Commission File No.)           (I.R.S. Employer
  jurisdiction                                            Identification No.)
of incorporation)

                 202 West Napa Street, Sonoma, California 95476
                 ----------------------------------------------
                    (Address of principal executive offices)

                                 (707) 935-3200
                                 --------------
                         (Registrant's telephone number,
                              including area code)
Item 7. Financial Statements and Exhibits.

         Exhibit No.          Exhibit Description
         -----------          -------------------

         99                   Press release announcing third quarter results

Item 12. Results of Operations and Financial Condition.

     Sonoma Valley Bancorp announced its results for the third quarter of fiscal
year 2003 on the attached press release.
SIGNATURE

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                            SONOMA VALLEY BANCORP,
                                            a California Corporation

Dated:  October 9, 2003             /s/ Mary Quade Dieter
                                    --------------------------------------------
                                    Mary Quade Dieter,
                                    Executive  Vice  President,  Chief Operating
                                    Officer and Chief Financial Officer
                                    (Principal Financial and Accounting Officer)