United States--u S Post Offices, Husum White Salmon, WA 98672 Phone : (509) 493-2630 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Husum 210 Main St Husum, WA 98623 Phone : (509) 493-2630 Business Category Post Offices Toll-Free           (800) ASK-USPS