U S Government--postal Service, Fredericksburg Ofc 133 Pine St Fredericksburg, PA 17026 Phone : (717) 865-5459 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Fredericksburg 3024 S Pine Grove St Fredericksburg, PA 17026 Phone : (717) 865-5459 Post Office - Fredericksburg Business Category Post Offices Toll-Free           (800) ASK-USPS