| Honorific-Prefix: | The Most Reverend |
| John Patrick O’Loughlin, M.S.C. | |
| Birth Date: | 1911 7, df=yes |
| Religion: | Roman Catholicism |
| Occupation: | Bishop |
| Predecessor: | Francis Xavier Gsell |
| Successor: | Edmund Collins |
John Patrick O’Loughlin, M.S.C. (25 July 1911 – 14 November 1985) was the fourth[1] Bishop of the Roman Catholic Diocese of Darwin, serving in this position from 22 May 1949 until his death on 14 November 1985, a well-above-average period of over 36 years.[2]
As Adelaide Goal's, Catholic chaplain, he brought the case of the aborigine, Rupert Max Stuart to the attention of Fr. Tom Dixon who fought against the death sentence and treatment of aborigines by the police.