[3] The Clemson Island Prehistoric District was listed on the National Register of Historic Places in 1981.

Unincorporated communities in the township include Powells Valley and Matamoras in the south.

[5] Most of the surface water in the township is part of the Susquehanna River, which averages 1 mile (1.6 km) wide in this area.

Powell Creek crosses the southern part of the township, and Armstrong Creek crosses the center, flowing into the Susquehanna north of Halifax borough.

18.1% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older.