Capital city Frankfurt Population 4,509,342 (2020) Surface 104,659 kmĀ² Governor Andy Beshear (D) Member of the US since 1792 Kentucky is one of the fifty states of the United States. The abbreviation for Kentucky is KY. Its nickname is ‘The Bluegrass State’. That means ‘Bluegrass State’. With 4,369,356 inhabitants, Kentucky is the 25th most populous…