 The Equinunk Historic District was listed on the National Register of Historic Places in 1999.According to the United States Census Bureau, the township has a total area of 45.0 square miles (116.4 km²), of which, 44.1 square miles (114 km²) of it is land and 0.9 square miles (2.0 km²) of it (2%) is water.As of the census of 2010, there were 836 people, 359 households, and 243 families residing in the township.