Leinster Junior Football Championship

The Leinster Junior Football Championship was a junior "knockout" competition in the game of Gaelic football played in the province of Leinster in Ireland. The series of games were organised by the Leinster Council. The competition ran from 1905 to 2019. The most successful county was Dublin who have won on twenty occasions.

The winners of the Leinster Junior Football Championship each year would then progress to play the other provincial champions for a chance to win the All-Ireland Junior Football Championship.

At GAA Congress in 2021, a motion was passed to change the entire structure of the All Ireland Junior Football Championship competition to that of a mostly 'overseas competition' along with just one Irish county, Kilkenny. The All-Ireland Junior Football Championship competition now involves just four teams: New York, Kilkenny, and the winner and runner-up of the British Junior Championship, all meeting in the All Ireland Junior Championship semi-finals. Hence there is no longer any Leinster Junior Football Championship competition.

Roll of honour
(* 1924 Longford awarded the title following an objection to Meath playing a Senior player. )