[3] On May 31, 1985, the township was hit by an F3 tornado as part of the 1985 United States–Canada tornado outbreak, destroying four businesses (Hummel's Texaco Service Station, Spotlight 88 Drive-In Theater, Kemp's Butcher Shop and J & J Supply hardware store) and several homes.

The northern boundary of the township is the Beaver County-Lawrence County line.

To the northeast across Connoquenessing Creek, North Sewickley Township runs adjacent with Franklin Township with a direct link via Mercer Road Bridge on PA Route 65.

As of the 2000 census,[7] there were 6,120 people, 2,238 households, and 1,759 families residing in the township.

There were 2,326 housing units at an average density of 112.0 per square mile (43.2/km2).

18.4% of all households were made up of individuals, and 9.6% had someone living alone who was 65 years of age or older.