 According to the United States Census Bureau, the township has a total area of 32.0 square miles (82.9 km²), of which, 31.1 square miles (80.6 km²) of it is land and 0.9 square miles (2.3 km²) of it (2.75%) is water.As of the census of 2000, there were 4,298 people, 1,624 households, and 1,216 families residing in the township.The population density was 138.2 people per square mile (53.3/km²).