Johnsonville State Historic Park is a state park in Humphreys County in the U.S. state of Tennessee. This 1,075-acre park commemorates the Battle of Johnsonville, which was fought in 1864 during the Civil War, and the historic town site of Johnsonville, which was inundated by the creation of Kentucky Lake by the Tennessee Valley Authority in the 1940s. It is located north of New Johnsonville.