| Type: | bishop |
| Honorific-Prefix: | The Most Reverend |
| Denis Joseph O'Connell | |
| Bishop of Richmond | |
| See: | Diocese of Richmond |
| Enthroned: | March 19, 1912 |
| Ended: | January 15, 1926 |
| Predecessor: | Augustine Van de Vyver |
| Successor: | Andrew James Louis Brennan |
| Ordination: | May 26, 1877 |
| Ordained By: | Raffaele Monaco La Valletta |
| Consecration: | May 3, 1908 |
| Consecrated By: | Cardinal James Gibbons |
| Other Post: | Auxiliary Bishop of San Francisco (1907–12) |
| Birth Date: | 28 January 1849 |
| Birth Place: | Donoughmore, County Cork, Ireland |
| Death Place: | Richmond, Virginia, USA |
| Buried: | Sacred Heart Cathedral, Richmond, Virginia, United States |
| Nationality: | American |
| Religion: | Roman Catholic |
| Parents: | Michael and Bridget O'Connell |
| Alma Mater: | Pontifical North American College |
Denis J. O'Connell (January 28, 1849 - January 1, 1927) was an Irish-born American prelate of the Roman Catholic Church. He served as bishop of the Diocese of Richmond in Virginia from 1912 to 1926. He previously served as an auxiliary bishop of the Archdiocese of San Francisco in California from 1908 to 1912.
Before becoming a bishop, O'Connell served as rector of the Pontifical North American College in Rome, then as rector of the Catholic University of America in Washington, D.C.
O'Connell was born on January 28, 1849, in Donoughmore, County Cork to Michael and Bridget O'Connell. His family emigrated to the United States and settled in Columbia, South Carolina, where his father's two brothers, Jeremiah and Joseph O'Connell, were serving as missionary priests.[1]
As a young man, O'Connell felt called to be a priest and entered St. Charles College in Ellicott City, Maryland, in 1868.[2] In part due to the influence of his uncles, in 1871 he was sent to Rome to study at the Pontifical North American College. "So brilliant was the young man that at his examination for the degree of Doctor of Divinity the cardinal prefect and examining professors accorded it to him by acclamation instead of by the usual method of balloting."[3]
O'Connell was ordained in Rome for the Diocese of Richmond on May 26, 1877, by Cardinal Raffaele La Valletta.[4]
When Bishop James Gibbons was appointed archbishop of the Archdiocese of Baltimore, he sent O'Connell to Rome in November as his procurator to accept the bishop's pallium. In 1884, O'Connell became secretary to Gibbons, and was sent to Rome with the decrees of the Third Plenary Council of Baltimore.
In 1885, O'Connell was appointed rector of the North American College a position he held until 1895.[5] In 1887, he was given the papal honor of domestic prelate with the title of monsignor.[6] Upon his return to Richmond, O'Connell was assigned to St. Peter's Parish. From 1903 to 1909, he served as the third rector of The Catholic University of America.
On December 16, 1907, O'Connell was appointed as titular bishop of Sebaste in Phrygia by Pope Pius X. O'Connell was consecrated at Cathedral of the Assumption of the Blessed Virgin Mary in Baltimore by Cardinal Gibbons on May 3, 1908.
On December 24, 1908, O'Connell was appointed by Pius X as an auxiliary bishop for the Archdiocese of San Francisco
On January 19, 1912, O'Connell was appointed as the seventh bishop of the Diocese of Richmond by Pius X.[7]
O'Connell's resignation for health reasons as bishop of the Diocese of Richmond was accepted by the pope on January 15, 1926; he was named the titular bishop of Mariamme.[8]
Denis O'Connell died on January 1, 1927, in Richmond at age 77. Bishop Denis J. O'Connell High School in Arlington, Virginia, founded when the location was still part of the Diocese of Richmond, is named for him.