United States Government--postal Service, Loomis 100 E Palmer Ave Loomis, WA 98827 Phone : (509) 223-4351 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Loomis 12 Palmer Ave Loomis, WA 98827 Phone : (509) 223-4351 Business Category Post Offices Toll-Free           (800) ASK-USPS