United States Government--postal Service, Harrisburg Stations & Branches, Offices, Campbelltown Palmyra, PA 17078 Phone : (717) 838-3021 Business Category Government Offices & Public Schools Post Office - Campbelltown 20 N Palmyra Rd Campbelltown, PA 17010 Phone : (717) 838-3021 Business Category Post Offices Toll-Free           (800) ASK-USPS U S Government--postal Service, Campbelltown Palmyra, PA 17078 Phone : (717) 838-3021 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--postal Service, Main Office, Nearby Offices, Campbelltown Palmyra, PA 17078 Phone : (717) 838-3021 Business Category Government Offices-Federal Government Offices & Public Schools