Residents of Caistor — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 22 | oads | francis | M | 56 | Anglican | English | England | Farmers, general and nfs | 103 |
| 25 | oads | mary | F | 11 | Episcopal Methodist | English | Ontario | No Occupation Listed | 103 |
| 23 | oads | rebecca | F | 49 | Episcopal Methodist | Welsh | United States | No Occupation Listed | 103 |
| 24 | oads | robert | M | 18 | Episcopal Methodist | English | Ontario | No Occupation Listed | 103 |
| 16 | ogilvy | fredric | M | 17 | Presbyterian | Scottish | Ontario | No Occupation Listed | 40 |
| 25 | oliver | jane | F | 51 | Presbyterian | Scottish | Scotland | No Occupation Listed | 148 |
| 24 | oliver | john | M | 56 | Presbyterian | Scottish | Scotland | Farmers, general and nfs | 148 |
| 2 | oliver | mary | F | 25 | Presbyterian | Scottish | Ontario | No Occupation Listed | 148 |
| 3 | oliver | oliver | M | 3 | Presbyterian | Scottish | Ontario | No Occupation Listed | 148 |
| 1 | oliver | robert | M | 28 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 148 |