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) April 15, 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 first quarter results

Item 9.  Regulation FD Disclosure.

         Sonoma  Valley  Bancorp  announced its results for the first quarter of
2003 on  the attached press release. This information is being provided pursuant
to Item 12.




<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:  April 15, 2003              /S/ MARY QUADE DIETER
                                    --------------------------------------------
                                    Mary Quade Dieter,
                                    Chief Financial Officer
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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) April 15, 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 first quarter results

Item 9.  Regulation FD Disclosure.

         Sonoma  Valley  Bancorp  announced its results for the first quarter of
2003 on  the attached press release. This information is being provided pursuant
to Item 12.
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:  April 15, 2003              /S/ MARY QUADE DIETER
                                    --------------------------------------------
                                    Mary Quade Dieter,
                                    Chief Financial Officer