United States Government--u S Postal Service, Latah Latah, WA 99018 Phone : (509) 286-3145 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Latah 123 W Market St Latah, WA 99018 Phone : (509) 286-3145 Post Office - Latah Business Category Post Offices Toll-Free           (800) ASK-USPS