| Gerry Sier | |
| Fullname: | Gerard John Sier |
| Birth Date: | 4 June 1928 |
| Originalteam: | CBC St Thomas, Clifton Hill |
| Height: | 180 cm |
| Weight: | 89 kg |
| Statsend: | 1950 |
| Years1: | 1948–49 |
| Games Goals1: | 10 (0) |
| Years2: | 1950 |
| Games Goals2: | 7 (0) |
| Games Goalstotal: | 17 (0) |
Gerard John Sier (4 June 1928 – 13 April 2006) was a former Australian rules footballer who played with Fitzroy and Richmond in the Victorian Football League (VFL).[1] His brother Ken Sier also played for Fitzroy and Richmond.