Hardyville is a small unincorporated community and census-designated place in Hart County, Kentucky, United States, located east of Munfordville on U.S. Route 31E. As of the 2010 census it had a population of 156.A post office was established in the community in 1868. It was named in honor of a series of popular stump speeches given at the crossroads during the 1850s by local politician James Greene Hardy, Lieutenant Governor of Kentucky from 1855 to 1856.