Census records of free Black heads of household in the antebellum South
| Name | State | Num In Family | Notes |
|---|---|---|---|
| Odill, Ichabod | Massachusetts | — | — |
| Ogden | New York | — | — |
| Oggs, Charles | North Carolina | 4 | — |
| Ogle, Benjamin | Maryland | — | — |
| Oidome, Jock | New Hampshire | 4 | — |
| Olive, Neptune | Connecticut | 4 | — |
| Oliver, Isaac | New York | — | — |
| Oliver, Timothy | Connecticut | 5 | — |
| Olliver, Matthew (Negro) | Maryland | — | — |
| Olney, Aaron (Negro) | Rhode Island | 8 | — |
| Olney, Bristol | Rhode Island | 10 | — |
| Omearica, Richmond’s (free Negro) | Delaware | 0 | — |
| Omer, Moses | Pennsylvania | — | — |
| Onion, Ceasar | Rhode Island | 1 | — |
| Opie, Lindsy | Virginia | — | — |
| Orange, Henry | North Carolina | 3 | — |
| Orm, Richard (free) | New York | — | — |
| Orson (free Negro) | Maryland | — | — |
| Osborne, Francis | Virginia | — | — |
| Othrington, Caleb (mulatto) | Maryland | — | — |
| Otis, Joseph (Negro) | Connecticut | 6 | — |
| Over, David | Pennsylvania | — | — |
| Overing, Bacchus | Rhode Island | 1 | — |
| Overing, Toby | Rhode Island | 2 | — |
| Overton, Lemuel | North Carolina | 2 | — |