Bishop Colm O'Reilly is the youngest of seven children born on the 11th January 1935 to John and Alicia O'Reilly of the Parish of Colmcille in the Diocese of Ardagh and Clonmacnois. His eldest brother, Peter, who died in 1988 was Superior General of St. Patrick's Missionary Society for sixteen years. Another brother, Brendan, who died in 2000, was a member of the Divine Word Missionary Order. He attended primary school in his native parish and subsequently went to St. Mel's College in Longford. He was ordained a priest in Maynooth on the 19th. of June 1960. Following on his ordination he spent his entire life as a priest in parishes in the Diocese of Ardagh and Clonmacnois. He ministered for nine years in Granard and until the time of his appointment as Bishop in 1983 he was Curate and later Administrator at St. Mel's Cathedral. As Bishop he has served the Episcopal Conference as President of Accord and of the Laity Commission of which he is still President. He is also currently President of Cura and is a member of the National Mission Council and the Pastoral Commission.