UNITED STATES
                       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 20, 2004



                              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) (Zip Code)

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


Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ]  Written communications pursuant to Rule 425 under the Securities
     Act (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
     (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))


<PAGE>



Section 2 - Financial Information

Item 2.02  Results of Operations and Financial Condition

      Sonoma Valley Bancorp announced its results for the third quarter ended
September 30, 2004 on the attached press release.

Section 9 - Financial Statements and Exhibits

Item 9.01  Financial Statements and Exhibits

      Exhibit No.                Exhibit Description

      99                         Press release announcing third quarter results




<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 20, 2004                   /s/ Mel Switzer, Jr.
                                         -----------------------------------
                                         Mel Switzer, Jr.,
                                         Chief Executive Officer and President
                                         (Principal Executive Officer)


<PAGE>


                                  EXHIBIT INDEX


         Exhibit No.         Description

            99               Press release dated October 20, 2004 titled
                             "Sonoma Valley Bancorp Announces Total Assets
                             $211 Million"
[{"type": "8-K", "sequence": "1", "filename": "for102004.txt", "secsgml_size_bytes": 3370}]
{"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": "041087360"}, "business-address": {"street1": "C/O SONOMA VALLEY BANCORP", "street2": "202 WEST NAPA STREET", "city": "SONOMA", "state": "CA", "zip": "95476"}}
UNITED STATES
                       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 20, 2004

                              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) (Zip Code)

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

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ]  Written communications pursuant to Rule 425 under the Securities
     Act (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
     (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))
Section 2 - Financial Information

Item 2.02  Results of Operations and Financial Condition

      Sonoma Valley Bancorp announced its results for the third quarter ended
September 30, 2004 on the attached press release.

Section 9 - Financial Statements and Exhibits

Item 9.01  Financial Statements and Exhibits

      Exhibit No.                Exhibit Description

      99                         Press release announcing third quarter results
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 20, 2004                   /s/ Mel Switzer, Jr.
                                         -----------------------------------
                                         Mel Switzer, Jr.,
                                         Chief Executive Officer and President
                                         (Principal Executive Officer)
EXHIBIT INDEX

         Exhibit No.         Description

            99               Press release dated October 20, 2004 titled
                             "Sonoma Valley Bancorp Announces Total Assets
                             $211 Million"