1870 Census
Grant County, Indiana
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | Y | Z |
| SURNAME | GIVEN NAME | AGE | SEX | RACE | BIRTH PLACE | LOCALITY |
| Oakley | Ezran | 37 | M | W | NC | Fairmount |
| Oatess | George A. | 26 | M | W | OH | Washington Twp |
| Oatess | John | 25 | M | W | OH | Washington Twp |
| Oatess | Josiah | 52 | M | W | VA | Washington Twp |
| Obrien | John | 52 | M | W | Ireland | Monroe Twp |
| Odom | Franklin | 17 | M | W | IN | Richland Twp |
| Oge | Catharine | 73 | F | W | NY | Marion |
| Ogle | James | 60 | M | W | WV | Green Twp |
| Ogle | Wm | 30 | M | W | IN | Green Twp |
| Oldacre | Mary A. | 17 | F | W | IN | Liberty Twp |
| Oldacre | Maylon | 18 | M | W | IN | Liberty Twp |
| Oliver | Abi | 51 | M | W | NC | Monroe Twp |
| Oliver | David | 58 | M | W | PA | Fairmount Twp |
| Oliver | David | 19 | M | W | IN | Jefferson Twp |
| Oliver | Edmund | 42 | M | W | OH | Center Twp |
| Oliver | Harrison | 54 | M | W | NC | Mill Twp |
| Oliver | Jeremiah | 21 | M | W | IN | Jonesboro |
| Oliver | John | 27 | M | W | IN | Jonesboro |
| Oliver | John W. | 26 | M | W | OH | Monroe Twp |
| Oliver | Joseph | 22 | M | W | IN | Monroe Twp |
| Oliver | Louisn J. | 30 | F | W | OH | Mill Twp |
| Oliver | William | 33 | M | W | OH | Mill Twp |
| Oliver | Winburn | 53 | M | W | NC | Monroe Twp |
| Oppy | David | 54 | M | W | OH | Marion |
| Oppy | Henry | 23 | M | W | OH | Marion |
| Orsborn | George | 57 | M | W | NJ | Franklin Twp |
| Orsborn | John | 36 | M | W | IN | Green Twp |
| Orsborn | Lucinda | 29 | F | W | OH | Fairmount Twp |
| Osborn | Henry | 60 | M | W | NC | Fairmount Twp |
| Osborn | Jane | 25 | F | W | OH | Marion |
| Osborn | Samuel | 67 | M | W | OH | Pleasant Twp |
| Osborn | William | 72 | M | W | NC | Fairmount Twp |
| Osborn | Wm. P. | 32 | M | W | IN | Fairmount Twp |
| Osborn | Zimeri | 25 | M | W | IN | Fairmount Twp |
| Osen | Jesse | 63 | M | W | TN | Monroe Twp |
| Oswalt | John | 54 | M | W | MD | Jefferson Twp |
| Overhultz | Morris | 59 | M | W | VA | Franklin Twp |
| Overley | David | 31 | M | W | OH | Center Twp |
| Overman | Anderson C. | 32 | M | W | IN | Center Twp |
| Overman | Curtis | 26 | M | W | IN | Center Twp |
| Overman | David | 30 | M | W | IN | Center Twp |
| Overman | George | 37 | M | W | IN | Center Twp |
| Overman | H.J. | 30 | M | W | IN | Franklin Twp |
| Overman | James | 23 | M | W | IN | Marion |
| Overman | James | 21 | M | B | IN | Franklin Twp |
| Overman | Jesse | 58 | M | W | OH | Mill Twp |
| Overman | Joel | 48 | M | W | IN | Center Twp |
| Overman | Johannah | 66 | F | W | IN | Center Twp |
| Overman | John | 54 | M | W | IN | Center Twp |
| Overman | Joseph | 26 | M | W | IN | Richland Twp |
| Overman | Joseph H. | 29 | M | W | IN | Mill Twp |
| Overman | Lindley | 25 | M | W | IN | Franklin Twp |
| Overman | Malessa | 21 | F | W | IN | Center Twp |
| Overman | Mills | 16 | M | W | IN | Center Twp |
| Overman | Milton | 24 | M | W | IN | Marion |
| Overman | Nathan P. | 25 | M | W | IN | Center Twp |
| Overman | Polly | 77 | F | W | NC | Center Twp |
| Overman | Sarah | 55 | F | W | OH | Center Twp |
| Overman | Stephen | 55 | M | W | IN | Center Twp |
| Overman | Thomas | 55 | M | W | IN | Marion |
| Overman | Willis | 31 | M | W | IN | Center Twp |
| Owen | Adam K. | 39 | M | W | IN | Fairmount Twp |
| Owens | Geo. W. | 20 | M | W | OH | Liberty Twp |
| Owings | Isaiah | 50 | M | W | OH | Pleasant Twp |
| Oxley | Benjamin F. | 32 | M | W | IN | Van Buren Twp |