 According to the United States Census Bureau, the township has a total area of 18.0 square miles (46.6 km²), of which, 17.7 square miles (46 km²) of it is land and 0.3 square miles (1 km²) of it (1.67%) is water.As of the census of 2010, there were 781 people, 314 households, and 237 families residing in the township.The population density was 44.1 people per square mile (17/km²).