(October 4, 1804 – July 4, 1874) was an Irish-born bishop of the Catholic Church in the United States.

[1] Born in the village of Cranna in County Tipperary, Ireland, O'Gorman professed solemn vows as a Trappist at Mount Melleray Abbey on March 25, 1841, and was ordained a priest on December 23, 1843.

He emigrated to the United States and became a monk at New Melleray Monastery near Dubuque, Iowa where he became its second Prior.

The principal co-consecrators were Bishops John Baptiste Miège, S.J., the Vicar Apostolic of Kansas, and Henry Juncker of Alton.

[4] When the Vicariate was established in 1859 it covered 357,000 square miles (920,000 km2) and emcopassed what are now the states of Nebraska, Wyoming, Montana, North Dakota, South Dakota, as well as northeastern Colorado, and parts of Utah.