| 2004 O'Byrne Cup | |
| Province: | Leinster |
| Year: | 2004 |
| Trophy: | O'Byrne Cup |
| Winners: | Meath |
| Manager: | Seán Boylan |
| Captain: | Ray Magee |
| Runnersup: | Westmeath |
| Runnerupmanager: | Páidí Ó Sé |
| Ordinal: | 7 |
| Next: | 2005 |
| Previous: | 2003 |
The 2004 O'Byrne Cup was a Gaelic football competition played by the teams of Leinster GAA, as well as one college team.[1] [2]