EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in Registration Statements No. 333-105537, 333-107329, 333-182433, and 333-233971 on Form S-8 of Westamerica Bancorporation of our report dated February 28, 2023 relating to the consolidated financial statements and effectiveness of internal control over financial reporting, appearing in this Annual Report on Form 10-K.
/s/ Crowe LLP
Crowe LLP
Sacramento, California
February 28, 2023