[2] According to the United States Census Bureau, the township has a total area of 37.1 square miles (96 km2), of which 37.1 square miles (96 km2) is land and 0.03% is water.

Dott is an unincorporated community located within Bethel Township.

As of the census[4] of 2000, there were 1,420 people, 559 households, and 423 families residing in the township.

There were 559 households, out of which 31.5% had children under the age of 18 living with them, 64.2% were married couples living together, 8.1% had a female householder with no husband present, and 24.3% were non-families.

20.6% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older.