Post Office - Adamsville 3940 Main St Ste 105 Adamsville, PA 16110 Phone : (724) 932-3949 Post Office - Adamsville Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--post Office, Adamsville 3940 Main St Jamestown, PA 16134 Phone : (724) 932-3949 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools