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Westamerica Bank Routing Numbers

In our record, Westamerica Bank has a total of 3 routing numbers.

Routing NumberProcess FedACHProcess FedwireLocationRegistered Name
121140218YYSuisun City, CAWestamerica Bank
121141000YNSuisun City, CAWestamerica Bank
121141615YNSuisun City, CAWestamerica Bank


A routing number is a nine digit code, used in the United States to identify the financial institution. Routing numbers are used by Federal Reserve Banks to process Fedwire funds transfers, and ACH(Automated Clearing House) direct deposits, bill payments, and other automated transfers. The routing number can be found on your check.
bank check routing number

The routing number information on this page was updated on Mar. 25, 2024

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