 According to the United States Census Bureau, the township has a total area of 20.5 square miles (53.2 km²), of which, 19.9 square miles (51.5 km²) of it is land and 0.7 square miles (1.7 km²) of it (3.26%) is water.As of the census of 2000, there were 408 people, 162 households, and 120 families residing in the township.The population density was 20.5 people per square mile (7.9/km²).