Hugh O’Reilly (1724–1801) was an Irish Catholic bishop.
O’Reilly was appointed the Coadjutor Bishop of the Diocese of Clogher in Ireland on 27 April 1777.
He became Roman Catholic Bishop of Clogher on 28 March 1778, following the death of his predecessor, Daniel O'Reilly.
[1] Ordained a bishop at the age of 38, Hugh O’Reilly was the youngest bishop of the diocese in modern times.
He died in office in on 3 September 1801 having served as bishop of his diocese for almost twenty-four years.