I think Hartford might be one of the few places in Kentucky that has a simple name based on its location. According to the Kentucky Encyclopedia, Hartford sits on the Rough River at a spot where deer (or Hart) would cross.
Ohio County is pretty old, being the thirty-fifth in order of formation. It got its name because it used to border the Ohio River to the North. The Kentucky Encyclopedia states that numerous burial mounds in the area indicate that the area was extensively populated by prehistoric people.
Ohio County’s Courthouses have had a rough history. The first log courthouse was built in 1800, but it collapsed in 1813. What remained of it was later burned when some particularly excited townspeople got a little out of hand celebrating Oliver Perry’s victory on Lake Erie. A brick courthouse built later was destroyed by Confederate soldiers. The third courthouse was demolished in 1940, when the courthouse above was built with PWA money.