The Most Reverend William David O'Brien | |
|---|---|
| Auxiliary Bishop of Chicago | |
| See | Chicago |
| Installed | April 25, 1934 |
| Term ended | February 19, 1962 |
| Orders | |
| Ordination | July 11, 1903 |
| Consecration | April 25, 1934 |
| Personal details | |
| Born | August 3, 1878 |
| Died | February 19, 1962 (aged 83) San Pierre, Indiana |
| Denomination | Roman Catholic Church |
William David O'Brien (August 3, 1878 – February 19, 1962) was an American prelate of the Roman Catholic Church. He served as an auxiliary bishop of the Archdiocese of Chicago from 1934 until his death in 1962, and was named an Archbishop in 1953.