 The Bells Mills Covered Bridge was listed on the National Register of Historic Places in 1980.According to the United States Census Bureau, the township has a total area of 26.8 square miles (69.5 km²), of which, 26.6 square miles (68.9 km²) of it is land and 0.2 square miles (0.5 km²) of it (0.75%) is water.Sewickley Township has five land borders, including North Huntingdon Township to the north, Hempfield Township to the east and southeast, Madison borough to the east-southeast, South Huntingdon Township to the south, and Sutersville borough to the southwest.