Located in Catharine Township is the Mount Etna Furnace Complex, originally listed on the National Register of Historic Places in 1973 and expanded in 1991.

Unincorporated communities in the township include Yellow Springs, Point View, St. Clair, and Robeson Extension.

[4] As of the census[6] of 2000, there were 758 people, 294 households, and 224 families residing in the township.

19.7% of all households were made up of individuals, and 10.2% had someone living alone who was 65 years of age or older.

A small portion of the Pennsylvania State Game Lands Number 118 is located in the eastern end of the township and a portion of Pennsylvania State Game Lands Number 166 lies on Canoe Mountain at the western end of the township.