 As the crow flies, Lycoming County is about northwest of Philadelphia and east-northeast of Pittsburgh.According to the United States Census Bureau, the township has a total area of 34.2 square miles (88.5 km2).34.1 square miles (88.3 km2) of it is land and 0.1 square miles (0.2 km2) of it (0.23%) is water.Limestone Township is in the southwestern corner of Lycoming County.