Penn Township Supervisors--garage 100 Municipal Building R Duncannon, PA 17020 Phone : (717) 834-4938 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools Township Garage 100 Municipal Building Rd Duncannon, PA 17020 Phone : (717) 834-4938 Business Category Government Offices-City Village & Twp Legislative Bodies