| Jack Douglas | |
| Fullname: | John William Douglas |
| Birth Date: | 6 November 1872 |
| Birth Place: | Melbourne, Victoria |
| Death Date: | [1] |
| Death Place: | East Melbourne, Victoria |
| Originalteam: | Cardigan |
| Statsend: | 1898 |
| Years1: | 1898 |
| Games Goals1: | 1 (0) |
John William Douglas (6 November 1872 – 15 October 1905) was an Australian rules footballer who played with Carlton in the Victorian Football League (VFL).