| Jack Cahill | |
| Fullname: | John Thomas Cahill |
| Birth Date: | 1 June 1895 |
| Birth Place: | Goornong, Victoria |
| Death Place: | Glen Iris, Victoria |
| Originalteam: | Williamstown / Brunswick |
| Statsend: | 1925 |
| Years1: | 1925 |
| Games Goals1: | 4 (3) |
John Thomas Cahill (1 June 1895 – 9 October 1972) was an Australian rules footballer who played with Carlton in the Victorian Football League (VFL).[1]
Originally from Brunswick, Cahill transferred to Williamstown for the 1923 season and played 10 games without kicking a goal before crossing to Carlton Districts in 1924. From there he was recruited by Carlton the following season.