The 2007 O'Byrne Cup was a Gaelic football competition played by the teams of Leinster GAA.
Wexford, Wicklow, DIT, Offaly, Laois, Louth, Westmeath and Dublin went on to play in the quarter-finals of the O'Byrne Cup.
The teams that exited in the first round were Carlow, Longford, UCD, Kildare, Meath, Athlone IT, and DCU who went on to play in the O'Byrne Shield.
The quarter finals involved Longford, UCD, Meath, Kildare, Athlone IT, DCU, Dundalk IT and Carlow.
Dundalk IT did not continue after dropping out of the O'Byrne Cup as replacements for Kilkenny, therefore their expected opponents Carlow qualified directly for the Shield semi final.