Kentucky is a state located in the Southern United States. Kentucky is the 37th most extensive and the 26th most populous of the 50 United States. The bluegrass region in the central part of the state houses the state's capital, Frankfort, as well as its two largest cities, Louisville and Lexington, the two of which together are home to over 20% of the state's population. Kentucky shares borders with Illinois, Indiana, and Ohio to the north, West Virginia and Virginia to the east, Tennessee to the south, and Missouri to the west.