The 1954 O'Byrne Cup was a Gaelic football tournament contested by the county teams of Leinster GAA. It was the first staging of the competition, then referred to as the Matt Byrne Memorial Cup.
Offaly won the tournament after defeating Louth in the final, played at Croke Park on 20 March 1955.
The tournament was contested on a knockout basis. First-round byes were awarded to Carlow, Laois, Longford and Meath.