Kilmacduagh (Irish: Cill Mhic Dhuach, meaning 'Church of Duach's son') is a small village in south County Galway, near Gort, in Ireland.
It is the site of Kilmacduagh monastery, seat of the Diocese of that name. The diocese is now part of the Diocese of Galway and Kilmacduagh in the Roman Catholic Church and in the Diocese of Tuam, Limerick and Killaloe in the Church of Ireland. The former cathedral is now a ruin.
The village is 5 km to the south-west of Gort via the R460 road.