Residents of Lancaster — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 2 | odette | mary | F | 4 | Roman Catholic | French | Ontario | No Occupation Listed | 148 |
| 1 | odette | virginia | F | 12 | Roman Catholic | French | Ontario | No Occupation Listed | 148 |
| 20 | oneil | lawrence | M | 53 | Roman Catholic | Irish | Ireland | Labourers nfs | 17 |
| 12 | oriley | catharine | F | 47 | Roman Catholic | Irish | Ireland | No Occupation Listed | 146 |
| 17 | oriley | catharine | F | 12 | Roman Catholic | Irish | United States | No Occupation Listed | 146 |
| 21 | oriley | edward | M | 20 | Roman Catholic | Irish | United States | No Occupation Listed | 138 |
| 1 | oriley | elizabeth | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 138 |
| 15 | oriley | frank | M | 17 | Roman Catholic | Irish | United States | Farmers, general and nfs | 146 |
| 11 | oriley | hugh | M | 55 | Roman Catholic | Irish | United States | Farmers, general and nfs | 146 |
| 22 | oriley | john | M | 15 | Roman Catholic | Irish | United States | No Occupation Listed | 138 |
| 24 | oriley | luke | M | 10 | Roman Catholic | Irish | United States | No Occupation Listed | 138 |
| 16 | oriley | margaret | F | 14 | Roman Catholic | Irish | United States | No Occupation Listed | 146 |
| 25 | oriley | mark | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 138 |
| 2 | oriley | mary | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 138 |
| 13 | oriley | mary | F | 23 | Roman Catholic | Irish | United States | No Occupation Listed | 146 |
| 19 | oriley | sarah | F | 46 | Roman Catholic | Irish | United States | No Occupation Listed | 138 |
| 18 | oriley | thomas | M | 46 | Roman Catholic | Irish | Quebec | Farmers, general and nfs | 138 |
| 20 | oriley | thomas | M | 21 | Roman Catholic | Irish | United States | No Occupation Listed | 138 |
| 14 | oriley | thomas | M | 22 | Roman Catholic | Irish | United States | Farmers, general and nfs | 146 |
| 23 | oriley | william | M | 12 | Roman Catholic | Irish | United States | No Occupation Listed | 138 |