| John O'Donnell | |
| Birth Name: | John Brook O'Donnell[1] |
| Birth Date: | c. 1902 |
| Death Date: | c. 1990 |
| Ru Position: | hooker |
| Repyears1: | 1928 |
| Repteam1: | Wallabies |
| Repcaps1: | 3 |
| Reppoints1: | 0 |
John Brook O'Donnell (c. 1902 – c. 1990) was a rugby union player who represented Australia. O'Donnell, a hooker, claimed a total of three international rugby caps for Australia.