EXHIBIT 99.1

                            CAPITOLBANK SACRAMENTO
          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

     The undersigned hereby appoints Thayer T. Prentice, Vice Chairman of the 
Board & Chief Executive Officer, and Bernard Rao, Senior Vice President & Chief 
Administrative Officer, and each of them, with full power of substitution, as 
proxies of the undersigned, to attend the Special Meeting of Shareholders of 
CapitolBank Sacramento ("CapitolBank") to be held at 300 Capitol Mall, 
Sacramento, California, on Thursday, February 23, 1994 at 5:00 p.m. and any 
adjournment or postponement thereof, and to vote the number of shares the 
undersigned would be entitled to vote if personally present upon the following 
items and to vote according to their discretion on any other matter which may 
properly be presented for action at said meeting or any adjournment or 
postponement thereof:

     1. TO ADOPT AND APPROVE THE AGREEMENT AND PLAN OF REORGANIZATION DATED AS
        OF NOVEMBER 17, 1994, BY AND BETWEEN WESTAMERICA BANCORPORATION
        ("WESTAMERICA") AND CAPITOLBANK, AN AGREEMENT OF MERGER AMONG
        WESTAMERICA, CAPITOLBANK AND WESTAMERICA MERGER SUBSIDIARY, A WHOLLY-
        OWNED SUBSIDIARY OF WESTAMERICA ("MERGER SUB"), THE MERGER OF MERGER SUB
        WITH AND INTO CAPITOLBANK AND THE TRANSACTIONS CONTEMPLATED THEREBY.

           [ ] FOR               [ ] AGAINST          [ ] ABSTAIN

               (To be completed and signed on the reverse side)




 
                          (Continued from other side)

     THIS PROXY WILL BE VOTED AS SPECIFIED, OR IF NO CHOICE IS SPECIFIED, THIS 
PROXY WILL BE VOTED "FOR" THE PROPOSAL SET FORTH. Please sign exactly as name 
appears. When shares are held by joint tenants, both should sign. When signing 
as attorney, executor, administrator, trustee or guardian, please give full 
title as such. If a corporation, please sign in full corporate name by president
or other authorized officer. If a partnership, please sign in a partnership name
by authorized person.

                                Dated:_____________________,1994

                                Signature______________________________________

                                Signature, if held jointly_____________________

     SHAREHOLDERS ARE URGED TO MARK, DATE, SIGN AND RETURN THIS PROXY IN THE 
ENVELOPE PROVIDED, WHICH REQUIRES NO POSTAGE IF MAILED IN THE UNITED STATES.