United States Government--postal Service, Cougar Office Cougar, WA 98616 Phone : (360) 238-5324 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Cougar 16745 Lewis River Rd Cougar, WA 98616 Phone : (360) 238-5324 Post Office - Cougar Business Category Post Offices Toll-Free           (800) ASK-USPS