Bernard O'Reilly (1 March 1803 – after 23 January 1856) was an Irish-born prelate of the Roman Catholic Church. Known for his service during the 1832 cholera outbreak in New York, he later served as Bishop of Hartford from 1850 until his death in 1856.
O'Reilly was born in Columcille, County Longford, and embarked for the United States in January 1825 with the intention of studying for the priesthood. He attended the Seminary of Montreal in Quebec, Canada, before completing his theological studies at St. Mary's Seminary in Baltimore, Maryland. His brother was the Rev. William O'Reilly, who was the pastor in the late 1840s of St. Raymond's Church (Bronx, New York) in the Diocese of New York, later rector of Our Lady of the Isle (Newport, Rhode Island), and eventually Vicar General of the Diocese of Hartford.
Bernard was ordained a priest in New York by Bishop Francis Kenrick on 13 October 1831. He was then assigned to St. James Church on Jay Street in Brooklyn, wher