St. Mary's College was a Catholic institution established by William Byrne and George Elder in Elder's hometown of Hardin's Creek near Lebanon in Marion County, Kentucky. The community was later renamed "St. Mary" after the college. St. Mary's is now closed. It operated between 1821 and 1976. Before it closed, it was the third oldest operating Catholic college for boys in the nation.[1]
The St. Mary's College Historic District was listed on the National Register of Historic Places in 1980.[2]