The Leinster Junior Hurling Championship is a junior "knockout" competition in the game of Hurling played in the province of Leinster in Ireland. The series of games are organized by the Leinster Council.
The winners of the Leinster Junior Hurling Championship each year progress to play the other provincial champions for a chance to win the All-Ireland Junior Hurling Championship.
Generally, the strong hurling counties have fielded their second team in this competition. In recent years though, they have participated in the Leinster Intermediate Hurling Championship instead. Since 2005, the competition has been suspended, with the counties participating in the Christy Ring Cup or Nicky Rackard Cup instead.
The championship was suspended after the completion of the 2004 Leinster Junior Hurling Championship. Five counties competed in the championship.
The championship is currently suspended but 12 counties would be eligible for the championship
At the end of the championship, the winning team progresses to the All-Ireland Junior Hurling Championship.