Ohio County is a county located in the U.S. state of Kentucky. As of the 2020 census, the population was 23,772. Its county seat is Hartford, and its largest city is Beaver Dam. The county is named after the Ohio River, which originally formed its northern boundary. It is a moist county, which means that the sale of alcohol is only legal within certain city limits.

Hartford is a home rule-class city in Ohio County, Kentucky, in the United States. It is the seat of its county. The population was 2,668 at the 2020 census. The town slogan, "Home of 2,000 happy people and a few soreheads", welcomes visitors when they enter the community. The Hartford, Kentucky website explains that "soreheads are community-minded, progressive citizens who work to promote civic pride".