Founded in July 1797, Elizabethtown is the Hardin County seat. In 1779, three early settlers, Capt. Thomas Helm, Col. Andrew Hynes, and Col. Samuel Haycraft, built forts with block houses to use as stockades for defense against Native Americans. The forts, being one mile apart, formed a triangle. At the time, there were no other settlements between the Ohio River and the Green River. Soon, however, other people came and settled around these forts.

Hardin County was established in 1793 and named for Colonel John Hardin, an Indian fighter who had been killed by Native Americans while on a peace mission with tribes in Ohio. It did not take long for the settlement to become an active community. In just a few years, professional men and tradesmen came to live in the area. In 1793, Colonel Hynes had thirty acres of land surveyed and laid off into lots and streets to establish Elizabethtown. Named in honor of the wife of Andrew Hynes, Elizabethtown was legally established on July 4, 1797.