Ambrose O'Madden (died 1715) was an Irish prelate of the Roman Catholic Church.
He was the parish priest of Loughrea when he was nominated Bishop of Killala and Apostolic Administrator of Kilmacduagh by the Sacred Congregation for the Propagation of the Faith on 30 August 1695.
[3] He was made Bishop of Kilmacduagh by Pope Clement XI on 15 November 1703, but the papal brief was delayed until 15 March 1707.
[6] On 10 May 1707, Archbishop James Lynch of Tuam wrote to Pope Clement XI saying it would be more convenient for O'Madden to be translated from Kilmacduagh to Clonfert, since O'Madden's parish of Loughrea was in the Diocese of Clonfert.
[4] However, it was not judged best at that time, and O'Madden was allowed to retain his parish of Loughrea, along with the see of Kilmacduagh.