Michael O'Connor (American bishop)

His Excellency, The Most Reverend Michael O'Connor S.J.
Bishop of Pittsburgh
See	Diocese of Pittsburgh
In office	August 15, 1843 – July 29, 1853; December 20, 1853 – May 23, 1860
Successor	Michael Domenec, C.M.
Other post(s)	Bishop of Erie (July 29, 1853 - December 20, 1853)
Orders
Ordination	June 1, 1833 by Costantino Patrizi Naro
Consecration	August 15, 1843 by Giacomo Filippo Fransoni
Personal details
Born	(1810-09-27)September 27, 1810 Cobh, County Cork, Ireland, United Kingdom of Great Britain and Ireland
Died	October 18, 1872(1872-10-18) (aged 62) Woodstock, Maryland, US
Education	Urban College of the Propaganda

Michael O'Connor, S.J. (September 27, 1810 – October 18, 1872) was an Irish-born prelate of the Roman Catholic Church in the United States and a member of the Society of Jesus. He served twice as bishop of the Diocese of Pittsburgh in Pennsylvania (1843 to early 1853 and late 1853 to 1860). O'Connor served briefly as bishop of the Diocese of Erie for several months in 1853.