Locations | Careers | Contact Us Search for: Business Personal About Us Access Your Account Contact Us Phone Numbers Customer Service Representatives (800) 848-1088 5 a.m. – midnight, 7 days a week 24-Hour Automated Telephone Banking (800) 848-1088 Banking Services (800) 829-8629 Business Online Services Merchant Card Services Loan Adjustments Loan Express Personal Loan Applications by Phone (800) 514-1460 Home Equity Lines of Credit (800) 442-6202 Mortgage Loan Servicing Mortgage Help (800) 877-8887 Investor Relations (707) 863-6992 Trust Services (800) 359-7562 Addresses General Bank Correspondence PO Box 1200 Suisun City, CA 94585-1200 Shipping and Overnight Deliveries 4550 Mangels Boulevard Fairfield, CA 94534 Loan Payments PO Box 1260 Suisun City, CA 94585-1260 Loan Servicing Loan documents, general correspondence PO Box 1190 Suisun City, CA 94585-1190 Mortgage Loan Servicing Mortgage documents, general correspondence PO Box 1180 Suisun City, CA 94585-1180 Investor Relations PO Box 1250 – A2B Suisun City, CA 94585-1200 Trust Services PO Box 1240 Suisun City, CA 94585-1240 CORPORATE HEADQUARTERS Westamerica Bancorporation and Subsidiary Bank Headquarters 1108 Fifth Avenue San Rafael, CA 94901 (415) 257-8000 HOLIDAY CLOSURES Branches and corporate offices are closed on the following holidays: New Year's Day Martin Luther King, Jr. Day Presidents Day Memorial Day Independence Day Labor Day Columbus Day Veterans Day Thanksgiving Day Christmas Day Business Business Online Banking Business Checking Business Savings Business Credit Cards Business Loans and Credit Business Services Personal Personal Online Banking Personal Checking Personal Savings Consumer Credit Cards Personal Loans and Credit Personal Services Info Privacy Policies Patriot Act Policy Web Accessibility Westamerica Bank Corporate Headquarters 1108 Fifth Avenue San Rafael, CA 94901 (800) 848-1088 Routing Number 121140218 Equal Housing Lender | Equal Opportunity Employer | Member FDIC Copyright © 2021 Westamerica Bancorporation. All Rights Reserved.