In the seventh century, the monastery of Kilmacduagh was founded by Saint Colman, son of Duagh.
4. c. 37), the united see became part of the bishopric of Killaloe and Clonfert in 1834.
Since 1976, Kilmacduagh has been one of the sees held by the Bishop of Limerick and Killaloe.
[2][3] The Roman Catholic Church bishopric of Kilmacduagh continued as a separate title until 1750 when Pope Benedict XIV decreed that it be united with the bishopric of Kilfenora.
Since 1883, the two sees have been part of the united Diocese of Galway, Kilmacduagh and Kilfenora.