Liberty Jail is a historical jail in Liberty, Missouri, United States, which served as the county jail of Clay County, Missouri between December 1834 and 1853. The jail is known in The Church of Jesus Christ of Latter-day Saints due to the imprisonment of Church president Joseph Smith and some of his associates during the 1838 Mormon War.

Liberty is a city in and the county seat of Clay County, Missouri, United States and is a suburb of Kansas City, located in the Kansas City Metropolitan Area. As of the 2020 United States Census the population was 30,167. Liberty is home to William Jewell College.