| Oliver Spencer Halstead | |
| Office: | 4th Mayor of Newark |
| Term Start: | 1840 |
| Term End: | 1841 |
| Predecessor: | James Miller |
| Successor: | William Wright |
| Birth Date: | 22 September 1792 |
| Birth Place: | Elizabeth, New Jersey |
| Death Place: | Newark, New Jersey |
| Party: | Whig |
Oliver Spencer Halstead (September 22, 1792 – August 29, 1877) was an American politician who served as the Mayor of Newark from 1840 to 1841.[1]