| Code: | Hurling |
| Sport: | Hurling |
| John Killeen | |
| Irish: | Seán Ó Cillín |
| Birth Date: | 1920 |
| Death Date: | July 2005 |
| County: | Laois |
| Province: | Connacht |
| Clubs: | Tynagh Clonad |
| Clcounty: | 2 |
| Counties: | Galway |
| Icposition: | Left wing-forward |
| Icyears: | 1944–1954 |
| Icallireland: | 0 |
| Nhl: | 1 |
| Birth Place: | Tynagh, County Galway, Ireland |
| Death Place: | Portlaoise, County Laois, Ireland |
John Killeen (1920 – June 2005) was an Irish hurler who played as a left wing-forward for the Galway senior team.[1]
Killeen made his first appearance for the team during the 1944 championship and was a regular member of the starting fifteen until his retirement a decade later after the 1954 championship. During that time he won a National Hurling League winners' medal.
At club level Duffy began his club career with Tynagh in Galway before later winning two county club championship medals with Clonad in Laois.