Kilcormac–Killoughey were the defending champions, however, they were defeated by St Rynagh's at the semi-final stage.
[1][2] Shamrocks entered the championship as a promoted team.
On 18 October 2015, Coolderry won the championship following a 2–15 to 1–16 defeat of St Rynagh's in the final.
[3] All but one of the twelve teams from the 2014 championship participated in the top tier of Offaly hurling in 2015.
Shamrocks, who defeated St Rynagh's by 0-22 tp 1–6 in the final of the intermediate championship in 2014, gained automatic promotion to the senior championship.