The Ulster Junior Hurling Championship was an annual hurling competition organised by the Ulster council. The championship forms the third-tier of Hurling for senior county teams in the province of Ulster (the Ulster Senior Hurling Championship is the first-tier trophy). It is contested by the six county teams ranked 18–23 in the All-Ireland Senior Hurling Championship. Each year, the champions are promoted to the Ulster Intermediate Hurling Championship.
The Ulster Championship was an integral part of the wider All-Ireland Junior Hurling Championship. The winners of the Ulster final, like their counterparts in the other provinces, are rewarded by advancing to the semi-final stage of the All-Ireland series of games.
The title has been won by 9 different counties, 8 of whom have won the title more than once. The all-time record-holders are Antrim, who have won the championship on 15 occasions. Down are the title-holders, defeating Fermanagh by 1–11 to 1–09 in the 2004 final.