[3] The Landis Mill Covered Bridge, Shenk's Mill Covered Bridge, Christian Habeck Farm, and Samuel N. Mumma Tobacco Warehouse are listed on the National Register of Historic Places.

[4] According to the U.S. Census Bureau, the township has a total area of 21.1 square miles (55 km2), all land.

It includes the unincorporated communities of Mechanicsville, Landisville, Bamford, Centerville, Chestnut Ridge, Rohrerstown, Donerville, Chestnut View, and Wheatland, as well as part of Salunga.

As of the census[6] of 2000, there were 21,399 people, 8,552 households, and 6,054 families residing in the township.

24.1% of all households were made up of individuals, and 9.5% had someone living alone who was 65 years of age or older.