| Alf Key | |
| Fullname: | Alf Key |
| Birth Date: | 14 November 1897 |
| Originalteam: | Carlton District |
| Statsend: | 1921 |
| Years1: | 1920 |
| Games Goals1: | 1 (0) |
| Years2: | 1921 |
| Games Goals2: | 2 (0) |
| Games Goalstotal: | 3 (0) |
Alf Key (14 November 1897 – 29 November 1977) was an Australian rules footballer who played for the Carlton Football Club and Fitzroy Football Club in the Victorian Football League (VFL).[1]