| Jack Leavenworth | |
| Birth Date: | 20 July 1881 |
| Birth Place: | Wallingford, Connecticut, U.S. |
| Death Place: | Meriden, Connecticut, U.S. |
| Alma Mater: | Yale University (1905) |
| Player Years1: | 1904 |
| Player Team1: | Yale |
| Player Positions: | Halfback |
| Coach Years1: | 1905 |
| Coach Team1: | Alabama |
| Overall Record: | 6–4 |
John Wallace Leavenworth (July 20, 1881 – August 8, 1962) was an American college football player and coach. He served as the head football coach at the University of Alabama in 1905, compiling a record of 6–4. Leavenworth played football as a halfback at Yale University. He died on August 8, 1962, at Meriden Hospital in Meriden, Connecticut.[1]