 The Dellville Covered Bridge was added to the National Register of Historic Places in 1980.According to the United States Census Bureau, the township has a total area of 21.1 square miles (54.6 km²), of which, 20.9 square miles (54.2 km²) of it is land and 0.2 square miles (0.4 km²) of it (0.76%) is water.As of the census of 2000, there were 3,329 people, 1,206 households, and 943 families residing in the township.