The Duhallow Junior B Hurling Championship is the second highest hurling competition in the Duhallow division in Cork. It is run for teams deemed too weak for the Duhallow Junior A Hurling Championship. The championship includes a group stage, so every team has at least two matches. The winners of the Duhallow competition go on to compete in the Cork Junior B Inter-Divisional Hurling Championship.
Newmarket are the title-holders, defeating Dromtarriffe by 0âÂÂ21 to 0âÂÂ07 in the 2025 final.
As of the 2026 competition, the teams were: