Westamerica Bank, 4560 Mangels Blvd, Fairfield, CA 94534, US

Westamerica Bancorporation operates as a holding company for Westamerica Bank, a regional community bank with 80-plus branches and two trust offices in more than 20 Northern and Central California counties. The largest subsidiary in the holding company, Westamerica Bank is a regional community bank with 90 offices located throughout Northern and Central California. The bank offers personal and business banking services that include cash and payment management services, electronic banking services, deposit accounts, loans, credit, trust services, alternative investments, foreign exchange, deposit-related services, check cards and 24-hour customer service. First chartered in 1884, Westamerica Bank is headquartered in San Rafael, Calif., with locations in Fairfield, Calif.