 According to the United States Census Bureau, the township has a total area of 35.8 square miles (92.7 km²), of which 35.7 square miles (92.5 km²) is land and 0.1 square mile (0.1 km²) (0.14%) is water.As of the census of 2000, there were 4,162 people, 1,469 households, and 1,213 families residing in the township.The population density was 116.5 per square mile (45.0/km²).