An overview map of Kentucky to publish. What do you call the state of Kentucky? When did Kentucky become the 15th state in the U.S.A.? Kentucky was the 15 th state in the United States; it became a state on June 1, 1792. Invite to the official UK tourist website https://kentucky-time46654.blogitright.com/7400126/kentucky-airport-can-be-fun-for-everyone