| Alex Sinclair | |
| Fullname: | Alexander Sinclair |
| Birth Date: | 29 January 1882 |
| Birth Place: | Beaufort, Victoria |
| Death Place: | Rhodesia |
| Originalteam: | Beaufort |
| Statsend: | 1902 |
| Years1: | 1902 |
| Games Goals1: | 3 (0) |
Alexander Sinclair (29 January 1882 – 25 August 1962) was an Australian rules footballer who played for the St Kilda Football Club in the Victorian Football League (VFL).[1]