Located just 15 miles west of Louisville, Kentucky, Harrison County, Indiana was named for General William Henry Harrison, First Territorial Governor of Indiana who later became the 9th President of the United States.

The county seat is in Corydon, which was once the Indiana State Capitol. On May 1, 1813, the capital of the territory was removed form Vincennes to Corydon and the original stone building used as the Capitol Building still stands. Near this building, under an elm tree, was written the first constitution of the State of Indiana.