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): February 17, 2005



                              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 8 - Other Events
------------------------

Item 8.01  Other Events

     Sonoma Valley  Bancorp  declared a twenty-five  cent ($0.25) per share cash
dividend on February 17, 2005. The cash dividend is payable to  shareholders  of
record  on  March  1,  2005  and  will be paid  on  March  15,  2005.  For  more
information, please see the press release attached as Exhibit 99.

Section 9 - Financial Statements and Exhibits
---------------------------------------------

Item 9.01  Financial Statements and Exhibits

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

         99                       Press  release  dated February 17, 2005 titled
                                  "Sonoma Valley Bancorp Declares Cash Dividend"

<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:  February 18, 2005                   /s/ Mel Switzer, Jr.
        -----------------                   ------------------------------------
                                            Mel Switzer, Jr.,
                                            Chief Executive Officer

<PAGE>


                                  EXHIBIT INDEX


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

              99                  Press  release  dated February 17, 2005 titled
                                  "Sonoma Valley Bancorp Declares Cash Dividend"
[{"type": "8-K", "sequence": "1", "filename": "for021705.txt", "secsgml_size_bytes": 3708}]
{"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": "05628727"}, "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): February 17, 2005

                              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 8 - Other Events
------------------------

Item 8.01  Other Events

     Sonoma Valley  Bancorp  declared a twenty-five  cent ($0.25) per share cash
dividend on February 17, 2005. The cash dividend is payable to  shareholders  of
record  on  March  1,  2005  and  will be paid  on  March  15,  2005.  For  more
information, please see the press release attached as Exhibit 99.

Section 9 - Financial Statements and Exhibits
---------------------------------------------

Item 9.01  Financial Statements and Exhibits

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

         99                       Press  release  dated February 17, 2005 titled
                                  "Sonoma Valley Bancorp Declares Cash Dividend"
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:  February 18, 2005                   /s/ Mel Switzer, Jr.
        -----------------                   ------------------------------------
                                            Mel Switzer, Jr.,
                                            Chief Executive Officer
EXHIBIT INDEX

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

              99                  Press  release  dated February 17, 2005 titled
                                  "Sonoma Valley Bancorp Declares Cash Dividend"