| John O'Mahony | |
| Fullname: | John O'Mahony |
| Birth Date: | 7 December 1931 |
| Originalteam: | Camberwell Juniors |
| Debutdate: | Round 14, 1951 |
| Debutteam: | Hawthorn |
| Debutopponent: | St Kilda |
| Debutstadium: | Junction Oval |
| Height: | 179 cm |
| Weight: | 70 kg |
| Position: | Halfback / Centre |
| Statsend: | 1960 |
| Years1: | 1951–1960 |
| Games Goals1: | 112 (28) |
| Careerhighlights: |
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Individual