Hardinsburg is a home rule-class city in Breckinridge County, Kentucky, in the United States. It is the seat of its county. The population was 2,343 at the 2010 census. Hardinsburg was named after Captain William Hardin.

Breckinridge County is a county located in the Commonwealth of Kentucky. As of the 2020 census, the population was 20,432. Its county seat is Hardinsburg, Kentucky. The county was named for John Breckinridge (1760–1806), a Kentucky Attorney General, state legislator, United States Senator, and United States Attorney General. It was the 38th Kentucky county in order of formation. Breckinridge County is now a wet county, following a local-option election on January 29, 2013, but it had been a dry county for the previous 105 years.