Shareholder Information

Annual Report Copies
Westamerica Bancorporation will provide its security holders, without charge, a copy of its 2007 Annual Report on Form 10-K, including the financial statements and schedules thereto, as filed with the Securities and Exchange Commission. Requests for copies of this annual report should be directed to:

Westamerica Bancorporation
Investor Relations, A-2B
Post Office Box 1250, Suisun City, CA 94585-1250
Telephone (707) 863-6992, E-mail: investments@westamerica.com
www.westamerica.com

Westamerica Bancorporation Board of Directors
David L. Payne, Chairman, President and Chief Executive Officer, Westamerica Bancorporation, and President and General Manager, Gibson Publications
Etta Allen, President, Allen Heating and Sheet Metal
Louis E. Bartolini, Retired Merrill Lynch Executive
E. Joseph Bowler, Retired Westamerica Executive
Arthur C. Latno, Retired Executive Vice President, Pacific Telesis Company
Patrick D. Lynch, Consultant, High Technology Companies
Catherine Cope MacMillan, Attorney
Ronald A. Nelson, Investments
Edward B. Sylvester, President, Sylvester Engineering, Inc.

Westamerica Bancorporation Corporate Officers
David L. Payne, Chairman, President and Chief Executive Officer
Jennifer J. Finger, Senior Vice President and Treasurer
James Schneck, Vice President and General Auditor
Robert A. Thorson, Senior Vice President and Chief Financial Officer

Westamerica Bank Management Officers
David L. Payne,Chairman, President and Chief Executive Officer
Jennifer J. Finger, Senior Vice President and Treasurer
Dennis R. Hansen, Senior Vice President, Operations and Systems Division Manager
Robert A. Thorson, Senior Vice President and Chief Financial Officer
Frank Zbacnik, Senior Vice President Credit Administration

Dividend Reinvestment
Westamerica Bancorporation offers a dividend reinvestment program whereby registered shareholders may reinvest their dividends in shares of the Company. Information concerning this optional program is available from:
Computershare Investor Services LLC
Telephone (877) 588-4258 (Toll-free)

Notice of Annual Meeting
The Westamerica Bancorporation Annual Meeting will be held on Thursday, April 24, 2008 at 11:00 a.m., at the Fairfield Center for Creative Arts, Fairfield, California 94533.

Stock Listing
The NASDAQ Stock Market, Symbol: WABC
Approximately 9,000 Shareholders of record at December 31, 2007.

Transfer Agent
Computershare Investor Services LLC
Telephone (877) 588-4258 (Toll-free)
www.computershare.com/investor