United States Government--postal Service U S, Lilliwaup Post Office 28621 N Us Highway 101 Lilliwaup, WA 98555 Phone : (360) 877-5472 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Lilliwaup 28611 N Us Highway 101 Lilliwaup, WA 98555 Phone : (360) 877-5472 Post Office - Lilliwaup Business Category Post Offices Toll-Free           (800) ASK-USPS