Post Office - Landisburg 101 N Carlisle St Landisburg, PA 17040 Phone : (717) 789-3311 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--postal Service, Landisburg Ofc Landisburg, PA 17040 Phone : (717) 789-3311 Business Category Government Offices-Federal Government Offices & Public Schools