Residents of Orford — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 9 | oakes | charles | M | 28 | Episcopal Methodist | Irish | Ontario | Farmers, general and nfs | 34 |
| 10 | oakes | jennie | F | 11 | Episcopal Methodist | Irish | Ontario | No Occupation Listed | 34 |
| 8 | oakes | pheb | F | 30 | Episcopal Methodist | Irish | Ontario | No Occupation Listed | 34 |
| 7 | oakes | terzal | F | 53 | Episcopal Methodist | Welsh | Ontario | No Occupation Listed | 34 |
| 11 | oakes | wm | M | 5 | Episcopal Methodist | Irish | Ontario | No Occupation Listed | 34 |
| 6 | oakes | | M | 64 | Episcopal Methodist | Irish | Ontario | No Occupation Listed | 34 |
| 20 | oaks | fannie | F | 28 | Methodist | English | Ontario | No Occupation Listed | 35 |
| 19 | oaks | george | M | 25 | Methodist | English | Ontario | Farmers, general and nfs | 35 |
| 21 | oaks | miles | M | 5 | Methodist | English | Ontario | No Occupation Listed | 35 |
| 10 | oliver | elgeon | M | 8 | Wesleyan Methodist | German | Ontario | No Occupation Listed | 102 |
| 9 | oliver | samantha | F | 25 | Wesleyan Methodist | Blank | Ontario | No Occupation Listed | 102 |
| 8 | oliver | william | M | 30 | Wesleyan Methodist | German | United States | Butchers | 102 |
| 17 | oneal | david | M | 17 | Presbyterian | Irish | Ontario | No Occupation Listed | 82 |
| 16 | oneal | hannah | F | 36 | Presbyterian | Scottish | Scotland | No Occupation Listed | 82 |
| 20 | oneal | jane | F | 7 | Presbyterian | Irish | Ontario | No Occupation Listed | 82 |
| 22 | oneal | john | M | 1 | Presbyterian | Irish | Ontario | No Occupation Listed | 82 |
| 21 | oneal | mary | F | 4 | Presbyterian | Irish | Ontario | No Occupation Listed | 82 |
| 18 | oneal | susan | F | 15 | Presbyterian | Irish | Ontario | No Occupation Listed | 82 |
| 15 | oneal | william | M | 47 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 82 |
| 19 | oneal | william | M | 11 | Presbyterian | Irish | Ontario | No Occupation Listed | 82 |
| 8 | oneall | david | M | 12 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 5 | oneall | henry | M | 44 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 81 |
| 11 | oneall | james | M | 7 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 9 | oneall | john | M | 10 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 12 | oneall | maggy | F | 5 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 6 | oneall | mary | F | 35 | Presbyterian | Scottish | Scotland | No Occupation Listed | 81 |
| 10 | oneall | mary | F | 8 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 14 | oneall | nancy | F | 1 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 13 | oneall | robert | M | 3 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 7 | oneall | susan | F | 14 | Presbyterian | Irish | Ontario | No Occupation Listed | 81 |
| 22 | oneil | patrick | M | 50 | Roman Catholic | Irish | Ireland | Boot and shoemakers and repairers | 78 |
| 20 | ore | emma | F | 14 | Episcopal Methodist | English | Ontario | No Occupation Listed | 100 |
| 21 | ore | isic | M | 11 | Episcopal Methodist | English | Ontario | No Occupation Listed | 100 |
| 23 | ore | martha | F | 2 | Episcopal Methodist | English | Ontario | No Occupation Listed | 100 |
| 19 | ore | rebecca | F | 16 | Episcopal Methodist | English | Ontario | No Occupation Listed | 100 |
| 17 | ore | robbert | M | 48 | Episcopal Methodist | Irish | Ireland | Farmers, general and nfs | 100 |
| 18 | ore | ruth | F | 42 | Episcopal Methodist | English | Ontario | No Occupation Listed | 100 |
| 22 | ore | ruth | F | 6 | Episcopal Methodist | English | Ontario | No Occupation Listed | 100 |
| 8 | oster | mary | F | 25 | Methodist | English | Ontario | No Occupation Listed | 126 |
| 7 | oster | melven | M | 28 | Methodist | English | Ontario | No Occupation Listed | 126 |
| 19 | owenes | charlot | F | 50 | Methodist | English | Ontario | No Occupation Listed | 255 |
| 18 | owenes | hiram | M | 47 | Methodist | Irish | Ontario | Pedlars and hawkers | 255 |
| 22 | owenes | john | M | 9 | Methodist | Irish | Ontario | No Occupation Listed | 255 |
| 20 | owenes | martha | F | 12 | Methodist | Irish | Ontario | No Occupation Listed | 255 |
| 23 | owenes | mary | F | 7 | Methodist | Irish | Ontario | No Occupation Listed | 255 |
| 24 | owenes | rebeca | F | 4 | Methodist | Irish | Ontario | No Occupation Listed | 255 |
| 21 | owenes | sarah | F | 11 | Methodist | Irish | Ontario | No Occupation Listed | 255 |