Robert J. Armstrong | |
|---|---|
| Bishop of Sacramento | |
 | |
| Church | Catholic Church |
| See | Diocese of Sacramento |
| In office | January 4, 1929 – January 14, 1957 |
| Predecessor | Patrick Joseph James Keane |
| Successor | Joseph Thomas McGucken |
| Orders | |
| Ordination | December 10, 1910 |
| Consecration | March 12, 1929 |
| Personal details | |
| Born | November 17, 1884 San Francisco, California, US |
| Died | January 14, 1957 (aged 72) Sacramento, California, US |
Robert John Armstrong, (November 17, 1884 – January 14, 1957) was an American prelate of the Roman Catholic Church. He served as the fourth Bishop of the Diocese of Sacramento in California from 1929 until his death in 1957.
Armstrong served during the Great Depression, World War II, the Korean War and the Vietnam War.