| Type: | Bishop |
| Honorific Prefix: | The Most Reverend |
| Arthur Joseph O'Neill | |
| Bishop of Rockford | |
| Church: | Roman Catholic Church |
| See: | Diocese of Rockford |
| Term: | October 11, 1968 – April 19, 1994 |
| Predecessor: | Loras Thomas Lane |
| Successor: | Thomas G. Doran |
| Ordination: | March 27, 1943 |
| Birth Date: | 14 December 1917 |
| Birth Place: | East Dubuque, Illinois, US |
| Death Place: | Narragansett, Rhode Island, US |
| Motto: | Ut Omnes Unum Sint (They may all be one) |
| Ordained By: | John Joseph Boylan |
| Consecration: | October 11, 1968 |
| Consecrated By: | Gerald Thomas Bergan |
Arthur Joseph O'Neill (December 14, 1917 - April 27, 2013) was an American prelate of the Roman Catholic Church. He served as bishop of the Diocese of Rockford in Illinois from 1968 to 1994.[1]
Arthur O'Neill was born on December 14, 1917, in East Dubuque, Illinois. He was ordained a priest for the Diocese of Rockford, Illinois, by Bishop John Boylan on March 27, 1943.
Pope Paul VI appointed O'Neill as bishop of the Diocese of Rockford on August 19, 1968. He was consecrated a bishop by Archbishop Gerald Bergan on October 11, 1968. Contemporary accounts described O'Neill as a compassionate man who enjoyed speaking with parishioners.[2]
Pope John Paul II accepted O'Neill's resignation as bishop of Rockford on April 19, 1994.[3] Arthur O'Neill died on April 27, 2013, in Rockford, Illinois, at the age of 95.