Residents of Williams W-O — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 9 | oarr | william | M | 23 | Baptist | English | England | river drivers | 103 |
| 12 | ohanly | angus | M | 10 | Roman Catholic | Scottish | Ontario | No Occupation Listed | 122 |
| 11 | ohanly | mary | F | 12 | Roman Catholic | Scottish | Ontario | No Occupation Listed | 122 |
| 13 | ohanly | mary | F | 8 | Roman Catholic | Scottish | Ontario | No Occupation Listed | 122 |
| 7 | oliver | cathrine | F | 20 | Wesleyan Methodist | Irish | Ontario | No Occupation Listed | 52 |
| 5 | oliver | fanny | F | 46 | Wesleyan Methodist | Irish | Ontario | No Occupation Listed | 52 |
| 9 | oliver | maggie | M | 12 | Wesleyan Methodist | Irish | Ontario | No Occupation Listed | 52 |
| 6 | oliver | sarah | F | 23 | Wesleyan Methodist | Irish | Ontario | No Occupation Listed | 52 |
| 8 | oliver | stephen | M | 17 | Wesleyan Methodist | Irish | Ontario | Farmers, general and nfs | 52 |
| 11 | oneill | henry | M | 22 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 25 |
| 13 | oneill | margery | F | 20 | Presbyterian | Irish | Ontario | No Occupation Listed | 25 |
| 10 | oneill | mary | F | 44 | Presbyterian | Scottish | Ontario | No Occupation Listed | 25 |
| 12 | oneill | melissa | F | 10 | Presbyterian | Irish | Ontario | No Occupation Listed | 25 |
| 9 | oneill | william | M | 45 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 25 |