SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                            SCHEDULE 14A INFORMATION
                  Proxy Statement Pursuant to Section 14(a) of
                      the Securities Exchange Act of 1934
                                (Amendment No. 1)

Filed by the Registrant [X]
Filed by a party other than the Registrant [ ]

Check the appropriate box:
[ ]      Preliminary Proxy Statement
[ ]      Confidential, for Use of the Commission Only (as permitted by Rule 14a-
         6(e)(2))
[ ]      Definitive Proxy Statement
[X]      Definitive Additional Materials
[ ]      Soliciting Material Pursuant to [ ] ss.240.14a-11(c)
         or [ ] ss.240.14a-12

                              Sonoma Valley Bancorp
                (Name of Registrant as Specified In Its Charter)

               ---------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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                              SONOMA VALLEY BANCORP
                         ANNUAL MEETING OF SHAREHOLDERS
                                  MAY 14, 2003


                    ABOUT THE MEETING AND VOTING YOUR SHARES

What is the purpose of the Annual Meeting?

The  purpose  of the  annual  meeting  is to  allow  you to vote on the  matters
outlined in the accompanying Notice of Annual Meeting of Shareholders, including
the election of the directors.

Who is entitled to vote?

1)  Only  shareholders of record at the close of business on the record date are
    entitled to vote at the annual meeting, or any postponements or adjournments
    of the meeting.

2)  Shareholders who hold their shares under their broker - as  non-certificated
    shares or in "street name", are not shareholders  of record. Their votes are
    cast by their broker pursuant to their  instructions,  and as provided under
    the rules of the New York Stock Exchange governing broker votes.

How do I vote?

Sign and date each proxy card you receive  and return it in the  postage-prepaid
envelope enclosed with your proxy materials. If you are a registered shareholder
and attend the meeting, you may deliver your completed proxy card(s) in person.

If your  shares are held by your  broker or bank,  (in  "street  name") you will
receive a form from your  broker  or bank  seeking  instructions  as to how your
shares should be voted.  If you do not instruct your broker or bank how to vote,
your broker or bank will vote your shares if it has discretionary  power to vote
on a  particular  matter.  Brokers  generally  have  discretion  to  vote on the
election of directors,  unless instructed  otherwise by the beneficial owner, or
unless there is a proxy contest.  If you wish to vote your shares at the meeting
you must contact your broker for a power of attorney.

Can I change my vote after I return my proxy card?

Yes. If your shares are held by your broker or bank (in "street  name") you will
need to notify your broker prior to the  meeting.  If you are a  shareholder  of
record,  you have the right to revoke  your proxy at any time before the meeting
by notifying the Company's Secretary at the following address:

         Sonoma Valley Bancorp
         202 W. Napa Street
         Sonoma, CA  95476


What shares are included on the proxy card(s)?

The shares on your proxy card(s) represent ALL of your shares.

What does it mean if I get more than one proxy card?

If your shares are registered  differently and are in more than one account, you
will receive more than one proxy card. Sign and return all proxy cards to ensure
that all your shares are voted. We encourage you to have all accounts registered
in the same name and  address  (whenever  possible).  If your shares are held by
your  broker or bank in "street  name," you must  contact the broker or bank who
holds your shares.

What happens if I abstain?

Proxies  marked  "abstain"  will be counted as shares present for the purpose of
determining  the  presence  of a quorum,  but for  purposes of  determining  the
outcome of a proposal, shares represented by such proxies will not be treated as
affirmative votes. For proposals  requiring an affirmative vote of a majority of
the shares present, an abstention is equivalent to a "no" vote.