The combined title was first used by the Church of Ireland from 1638 to 1660 and again from 1679 to 1835.
At present the title is being used by the Roman Catholic Church.
Since 1835, the sees of Cork, Cloyne and Ross have again been reunited under one bishop.
The Roman Catholic title was formed by the union of the bishoprics of Cork and Ross on 19 April 1958.
The current bishop is the Most Reverend Fintan Gavin, Bishop of the Roman Catholic Diocese of Cork and Ross who was appointed by the Holy See on 8 April 2019 and was installed at the Cathedral of St Mary and St Anne, Cork, on 30 June 2019.