 The Trostletown Bridge was added to the National Register of Historic Places in 1980.According to the United States Census Bureau, the township has a total area of 36.2 square miles (93.7 km2), of which 35.6 square miles (92.1 km2) is land and 0.6 square miles (1.6 km2) (1.74%) is water.It is bordered on the west by Jenner Township, on the north by Conemaugh Township and Paint Township, on the east by Shade Township, and on the south by Stonycreek Township and Somerset Township.