The Diocese of Killaloe is a Roman Catholic diocese in mid-western Ireland. It is one of six suffragan dioceses in the ecclesiastical province of Cashel (also known as Munster) and is subject to the Archbishop of Cashel and Emly. The Ordinary, Kieran O'Reilly, received episcopal ordination on August 29th 2010. The cathedral church of Ss Peter and Paull is situated in Ennis, County Clare.