Cleveland Junior Naval Academy (also known as Cleveland High School) was a magnet military academy high school in St. Louis, Missouri and was a part of the St. Louis Public Schools. Cleveland High School opened in 1915 as a comprehensive high school, merging with the Junior Naval Academy in 1984. The Junior Naval Academy was a magnet military academy, founded in 1981. In 2006, the school moved from its original location on Louisiana Avenue (38°34′40″N 90°14′34″W / 38.5777°N 90.2429°W) to the Pruitt Military Academy building on North 22nd Street, then, in 2010, it moved from Pruitt to the Southwest High School building at Arsenal and Kingshighway. In 2021, the St. Louis Public Schools board voted to close the location effective the upcoming school year.