| Honorific Prefix: | His Eminence, The Most Reverend |
| James O'Reilly | |
| Bishop of Fargo | |
| Church: | Roman Catholic Church |
| See: | Diocese of Fargo |
| Appointed: | --> |
| Term: | May 19, 1910 to December 19, 1934 |
| Predecessor: | John Shanley |
| Successor: | Aloisius Joseph Muench |
| Ordination: | June 24, 1882 |
| Consecration: | May 19, 1910 |
| Consecrated By: | Archbishop John Ireland |
| Birth Date: | 10 October 1855 |
| Birth Place: | County Cavan, Ireland |
| Tomb: | --> |
| Nationality: | Irish |
| Education: | All Hallows College |
James O'Reilly (October 10, 1855—December 19, 1934) was an Irish-born prelate of the Roman Catholic Church. He served as the second bishop of the Diocese of Fargo from 1910 until his death in 1934.
James O'Reilly was born in Lisgrea, County Cavan Ireland on June 24, 1882. He was educated at All Hallows College in Dublin
O'Reilly was ordained to the priesthood on June 24, 1882, for the Archdiocese of St. Paul. After his ordination, he served as pastor in parishes in Belle Creek, Lake City and Stillwater, Minnesota.[1] In 1886, O'Reilly was appointed pastor of St. Anthony of Padua Parish in Minneapolis.
On December 18, 1909, O'Reilly was appointed the second bishop of the Diocese of Fargo by Pope Pius X.[2] He received his episcopal consecration on May 19, 1910, from Archbishop John Ireland, with Bishops James McGolrick and James Trobec serving as co-consecrators.[3]
James O'Reilly died on December 19, 1934, at age 79.