{{Use Irish English, date=February 2020
The Diocese of Waterford was established in the year AD 1096. It was merged with the Diocese of Lismore on 16 June 1363 to form the Diocese of Waterford and Lismore.Diocese of Waterford and Lismore /ref> The merged entity remained an independent diocese in the
Roman Catholic
The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...
Church. In the
Church of Ireland
The Church of Ireland (, ; , ) is a Christian church in Ireland, and an autonomy, autonomous province of the Anglican Communion. It is organised on an all-Ireland basis and is the Christianity in Ireland, second-largest Christian church on the ...
, it underwent further mergers and is currently incorporated within the ''United Dioceses of Cashel, Waterford, Lismore, Ossory, Ferns and Leighlin'' and is referred to as the Diocese of Cashel and Ossory.
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Roman Catholic Diocese of Waterford and Lismore
The Diocese of Waterford and Lismore ( Irish: ''Deoise Phort Láirge agus Leasa Móire'' ) is a Latin diocese of the Catholic Church in Ireland. It is one of six suffragan dioceses in the ecclesiastical province of Cashel (also known as Munster) ...
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Diocese of Cashel and Ossory
The United Dioceses of Cashel and Ossory (''Full title'': the United Dioceses of Cashel, Waterford and Lismore with Ossory, Ferns and Leighlin, ) is a diocese of the Church of Ireland in the south-eastern part of Ireland