All-Ireland Under 21 B Hurling Championship
The All-Ireland Under-21 B Hurling Championship is an annual hurling competition organised by the Gaelic Athletic Association for players aged between eighteen and twenty-one in Ireland. It is sponsored by Bord Gáis and therefore officially known as the Bord Gáis GAA Hurling All-Ireland Under-21 B Championship.
The series of games are played during the summer months with the All-Ireland final being played in September. The championship has always been played on a straight knockout basis open to teams from each of the four provinces of Ireland. Teams that are deemed ineligible or "too weak" for the All-Ireland Under-21 Hurling Championship participate in the B championship.
The championship currently consists of several stages, beginning with quarter-finals and culminating in a final.