 According to the United States Census Bureau, the township has a total area of 40.5 square miles (104.8 km²), of which, 38.7 square miles (100.2 km²) of it is land and 1.8 square miles (4.6 km²) of it (4.40%) is water.Tioga Township is bordered by Lawrence Township to the north, Jackson and Rutland Townships to the east, Richmond Township to the south and Middlebury and Farmington Townships to the west.Tioga Township surrounds the borough of Tioga.