St Mary's Cathedral, Elphin

St. Mary's Cathedral, Elphin
53°50′43″N 8°11′26″W / 53.845229°N 8.190599°W / 53.845229; -8.190599
LocationAchonry, Co Roscommon
CountryIreland
DenominationChurch of Ireland
Previous denominationRoman Catholic
Administration
ProvinceProvince of Armagh
DioceseDiocese of Kilmore, Elphin and Ardagh

St Mary's Cathedral, Elphin, is a former cathedral in Ireland.

It was formerly the cathedral of the Diocese of Elphin, and then a joint cathedral in Kilmore, Elphin and Ardagh. It was founded by St. Patrick and destroyed during the Rebellion of 1641. It was rebuilt during the time of Bishop John Parker. It has lain ruined since 1957.