United States Government--postal Service, Harrisburg Stations & Branches, Offices, Grantville 5 Firehouse Rd Grantville, PA 17028 Phone : (717) 469-0312 Business Category Government Offices & Public Schools Automated Postal Center - Grantville 251 Firehouse Rd Grantville, PA 17028 Phone : (717) 469-0312 Business Category Automated Postal Centers Toll-Free           (800) ASK-USPS Post Office - Grantville 251 Firehouse Rd Grantville, PA 17028 Phone : (717) 469-0312 Business Category Post Offices Toll-Free           (800) ASK-USPS