Residents of Dufferin N — Sub-district G, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 19 | oakes | william | M | 29 | Anglican | Scottish | Scotland | Farmers, general and nfs | 168 |
| 25 | obrien | adele | F | 0 | Roman Catholic | Irish | Manitoba | No Occupation Listed | 177 |
| 24 | obrien | louisa | F | 2 | Roman Catholic | Irish | Manitoba | No Occupation Listed | 177 |
| 23 | obrien | olive | F | 21 | Roman Catholic | Irish | United States | No Occupation Listed | 177 |
| 22 | obrien | timothy | M | 30 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 177 |
| 11 | oliver | earnest | M | 20 | Wesleyan Methodist | English | England | Farmers, general and nfs | 101 |
| 10 | oliver | herbert | M | 22 | Wesleyan Methodist | English | England | Farmers, general and nfs | 101 |
| 8 | oliver | jason | M | 51 | Wesleyan Methodist | English | England | Farmers, general and nfs | 101 |
| 13 | oliver | norah | F | 13 | Wesleyan Methodist | English | England | No Occupation Listed | 101 |
| 9 | oliver | sarah | F | 50 | Wesleyan Methodist | English | England | No Occupation Listed | 101 |
| 12 | oliver | sarah | F | 17 | Wesleyan Methodist | English | England | No Occupation Listed | 101 |
| 23 | orr | john | M | 44 | Presbyterian | Scottish | Scotland | Farmers, general and nfs | 177 |
| 25 | orr | kate | F | 1 | Presbyterian | Scottish | Ontario | No Occupation Listed | 177 |
| 8 | orr | malcolm | M | 22 | Presbyterian | Scottish | Scotland | river drivers | 37 |
| 24 | orr | nancy | F | 32 | Presbyterian | Scottish | Scotland | No Occupation Listed | 177 |
| 1 | orr | nancy | F | 0 | Presbyterian | Scottish | Manitoba | No Occupation Listed | 177 |
| 6 | ostrander | andrew | M | 51 | Episcopal Methodist | Dutch | Ontario | Farmers, general and nfs | 153 |
| 9 | ostrander | christian | M | 17 | Episcopal Methodist | Dutch | Ontario | Farmers, general and nfs | 153 |
| 21 | ostrander | easter | F | 24 | Episcopal Methodist | English | Ontario | No Occupation Listed | 140 |
| 11 | ostrander | evangeline | F | 13 | Episcopal Methodist | Dutch | Ontario | No Occupation Listed | 153 |
| 12 | ostrander | george | M | 7 | Episcopal Methodist | Dutch | Ontario | No Occupation Listed | 153 |
| 20 | ostrander | james | M | 24 | Episcopal Methodist | Dutch | Ontario | Farmers, general and nfs | 140 |
| 7 | ostrander | jane | F | 50 | Episcopal Methodist | Dutch | Ontario | No Occupation Listed | 153 |
| 10 | ostrander | mary | F | 14 | Episcopal Methodist | Dutch | Ontario | No Occupation Listed | 153 |
| 8 | ostrander | rebecca | F | 21 | Episcopal Methodist | Dutch | Ontario | No Occupation Listed | 153 |
| 13 | ostrander | william | M | 23 | Episcopal Methodist | Dutch | Ontario | Farmers, general and nfs | 154 |