[3] Communities within the township include Hopwood, Hatfield, Hutchinson, Chadville, South Uniontown, Leith, and Revere.

South Union Township contains the larger two of the three Uniontown area shopping districts.

Another important shopping area is called Walnut Hill and is located in Hatfield.

The borough of Uniontown was taken from it in 1796, and a part of Wharton Township was added to it in 1802.

U.S. Route 40, following the National Road, forms the border with North Union Township.

U.S. Route 119 bypasses Uniontown to the west, with four exits in South Union Township.

27.4% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older.