[3] It is the birthplace of both Baseball Hall of Fame member Nellie Fox, and United States Army brigadier general and legislator, Charles Thomas Campbell.

The Franklin Furnace Historic District, Chambersburg and Bedford Turnpike Road Company Toll House, and Woodland are listed on the National Register of Historic Places.

It was later called "Campbelltown", a designation that prevailed for many years until, at the suggestion of William Archibald, it received the official designation "St. Thomas", purportedly still honoring Thomas Campbell, who had laid out the village.

Conodoguinet Creek, a tributary of the Susquehanna River, rises in the extreme western corner of the township, at the juncture of Little and Blue mountains.

The rest of the township is drained by tributaries of Conococheague Creek, part of the Potomac River watershed.

U.S. Route 30 crosses the township, leading east to Chambersburg, the county seat, and west to McConnellsburg.

17.8% of all households were made up of individuals, and 7.7% had someone living alone who was 65 years of age or older.