The Connacht Junior Hurling Championship is a junior "knockout" competition in the game of Hurling played in the province of Connacht in Ireland.

[1] The series of games are organised by the Connacht Council.

The winners of the Connacht Junior Hurling Championship each year progress to play the other provincial champions for a chance to win the All-Ireland Junior Hurling Championship.

The fifth county – Galway – have instead represented Connacht in the All-Ireland Intermediate Hurling Championship.

The most successful team of each decade, judged by number of titles, is as follows: