Mountbolus (Irish: Cnocán Bhólais) is a small village in the parish of Killoughey situated at the foot of the Slieve Bloom Mountains in County Offaly, Ireland. It has a Church, a National School, a Shop/Post Office and two public houses. It also has a small GAA club called Kilcormac-Killoughey. When Offaly won the 1998 All-Ireland Senior Hurling Championship the goalkeeper on the team was Stephen Byrne from the club.