Kentucky County is a term used to refer to the counties in the state of Kentucky. Boone County, with five letters, is located in northern Kentucky and is named after frontiersman Daniel Boone. Knox County, with four letters, is located in the southeastern part of the state and was named after Henry Knox, the first Secretary of War. BOURBON County, with seven letters, is located in the central part of the state and is named after the French royal family. Adair County, with five letters, is located in south-central Kentucky and is named after John Adair, a Revolutionary War hero. Harlan County, with six letters, is located in southeastern Kentucky and is named after Silas Harlan, a soldier in the American Revolution.