Check the WESTAMERICA BANK routing numbers list. WESTAMERICA BANK has 3 active routing numbers.
WESTAMERICA BANK routing number is a nine-digit numeric code printed on the bottom of checks that is used to facilitate the electronic routing of funds (ACH transfer) from one bank account to another.
Click on the routing number to get information like telephone number and delivery address for the check.
Routing Number Address City State Zip
121140218 PO BOX 1200 SUISUN CITY CA 94585
121141000 PO BOX 1200 SUISUN CITY CA 94585
121141615 PO BOX 1200 SUISUN CITY CA 94585
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