The united diocese of Tuam, Killala and Achonry covers all of County Mayo, much of Counties Galway and Sligo and a small portion of County Roscommon. Geographically it forms one of the largest dioceses in the Church of Ireland but numerically is the smallest with fewer than two thousand parishioners spread across nine parochial cures. There are thirty churches attended and cared for by loyal and devout congregations.

Ballina Churches Together is an ecumenical Social Outreach Initiative involving the four main Christian denominations working closely together to identify and assist in addressing social justice issues in Ballina town.