Boyle County is a county located in the central part of Kentucky. As of the 2020 census, the population was 30,614. Its county seat is Danville. The county was formed in 1842 and named for John Boyle, a U.S. Representative, chief justice of the Kentucky Court of Appeals, and later federal judge for the District of Kentucky, and is part of the Danville, KY Micropolitan Statistical Area.