| 2000 O'Byrne Cup | |
| Province: | Leinster |
| Year: | 2000 |
| Trophy: | O'Byrne Cup |
| Winners: | Longford |
| Manager: | Michael McCormack |
| Captain: | Enda Barden |
| Runnersup: | Westmeath |
| Runnerupcaptain: | Martin Flanagan |
| Runnerupmanager: | Brendan Lowry |
| Ordinal: | 2 |
| Previous: | 1999 |
| Next: | 2001 |
The 2000 O'Byrne Cup was a Gaelic football competition played by the county teams of Leinster GAA.
The tournament was a straight knockout, with 12 teams.
Longford were the winners, defeating Westmeath in the final in Cusack Park, Mullingar.[1] [2] In the final, the Westmeath manager, Brendan Lowry, intruded onto the pitch and clashed with a Longford player and the referee; he received a six-month suspension.[3] [4] The suspension was later lifted.[5]