Residents of Gainsborough — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 16 | ortt | barbara | F | 4 | Baptist | German | Ontario | No Occupation Listed | 75 |
| 12 | ortt | charles | M | 46 | Baptist | German | United States | Stone masons | 75 |
| 17 | ortt | evia | F | 1 | Baptist | German | Ontario | No Occupation Listed | 75 |
| 13 | ortt | isabella | F | 34 | Baptist | Scottish | Ontario | No Occupation Listed | 75 |
| 14 | ortt | james | M | 14 | Baptist | German | Ontario | No Occupation Listed | 75 |
| 15 | ortt | may | F | 10 | Baptist | German | Ontario | No Occupation Listed | 75 |
| 10 | ostrosser | edgar | M | 8 | | Blank | Ontario | No Occupation Listed | 329 |
| 5 | ostrosser | john | M | 42 | Disciple of Christ | German | Ontario | Farmers, general and nfs | 329 |
| 9 | ostrosser | john | M | 10 | | Blank | Ontario | No Occupation Listed | 329 |
| 6 | ostrosser | mary | F | 31 | Disciple of Christ | Blank | Ontario | No Occupation Listed | 329 |
| 7 | ostrosser | samuel | M | 13 | | Blank | Ontario | No Occupation Listed | 329 |
| 8 | ostrosser | sarah | F | 11 | | Blank | Ontario | No Occupation Listed | 329 |
| 11 | ostrosser | william | M | 5 | | Blank | Ontario | No Occupation Listed | 329 |
| 25 | overholt | albert | M | 17 | Episcopal Methodist | German | Ontario | No Occupation Listed | 157 |
| 18 | overholt | david | M | 20 | Disciple of Christ | German | Ontario | Farmers, general and nfs | 235 |
| 15 | overholt | elizabeth | F | 54 | Disciple of Christ | German | Ontario | No Occupation Listed | 235 |
| 14 | overholt | isaac | M | 57 | Disciple of Christ | German | Ontario | Farmers, general and nfs | 235 |
| 16 | overholt | maranda | F | 30 | Disciple of Christ | German | Ontario | No Occupation Listed | 235 |
| 19 | overholt | mary | F | 15 | Disciple of Christ | German | Ontario | No Occupation Listed | 235 |
| 20 | overholt | sarah | F | 11 | Disciple of Christ | German | Ontario | No Occupation Listed | 235 |
| 17 | overholt | william | M | 27 | Disciple of Christ | German | Ontario | Farmers, general and nfs | 235 |