[7] The Etters Bridge was added to the National Register of Historic Places in 1986.

[8] The township is near the southeastern corner of Cumberland County, bordered to the southeast by Yellow Breeches Creek, a tributary of the Susquehanna River.

The Harrisburg Capital Beltway runs along the northern border of the township or just north of it, and the U.S. Route 15 freeway crosses the northwest part of the township, with access from three exits (Rossmoyne Road, Slate Hill Road, and Lower Allen Drive at the Capital City Mall).

Interstate 76, the Pennsylvania Turnpike, crosses the center of the township, with the closest access to the west in Upper Allen Township, where the turnpike crosses US 15 at Exit 236.

34.3% of all households were made up of individuals, and 16.4% had someone living alone who was 65 years of age or older.