United States Government--u S Postal Service, Post Offices, Malden Malden, WA 99149 Phone : (509) 569-2161 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Malden 1 S Main St Malden, WA 99149 Phone : (509) 569-2161 Post Office - Malden Business Category Post Offices Toll-Free           (800) ASK-USPS