The Cathedral Church of St. Fachtna, Ross is a cathedral of the Church of Ireland in Rosscarbery, County Cork in Ireland. It is in the ecclesiastical province of Dublin.
Previously the cathedral of the Diocese of Ross, it is now one of three cathedrals in the United Dioceses of Cork, Cloyne and Ross.
St Fachtna's is one of the smallest cathedrals in Ireland. It is the size of a typical parish church. 
- ^ A History of the City and County of Cork by Mary Francis Cusack 1875
Coordinates: 51°34′40″N 09°01′34″W / 51.57778°N 9.02611°W