There are 6 US Post Offices in Hart County serving a total of 19,209 residents equating to 3,202 residents per post office. It's estimated that approximately 30,660 packages are handled across the 6 county post offices annually. Hart County is a county located in the Commonwealth of Kentucky. As of the 2010 census, the population was 18,199. Its county seat is Munfordville. Hart County is a prohibition or dry county."