Residents of Elmsley N — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 11 | obrien | margret | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 114 |
| 10 | obrien | mary | F | 27 | Roman Catholic | Irish | Ireland | Factory labourers (non-specified manufacturing) | 114 |
| 16 | ohara | charles | M | 90 | Presbyterian | Irish | Ireland | No Occupation Listed | 104 |
| 20 | ohara | charles | M | 27 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 105 |
| 15 | ohara | eliza | F | 55 | Presbyterian | Scottish | Ontario | No Occupation Listed | 104 |
| 23 | ohara | elizabeth | F | 19 | Presbyterian | Irish | Ontario | No Occupation Listed | 105 |
| 14 | ohara | harford | M | 53 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 104 |
| 22 | ohara | john | M | 23 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 105 |
| 21 | ohara | margret | F | 25 | Presbyterian | Irish | Ontario | Teachers (unspecified) | 105 |
| 19 | ohara | mary | F | 53 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 105 |
| 24 | ohara | mary | F | 16 | Presbyterian | Irish | Ontario | No Occupation Listed | 105 |
| 25 | oliver | euphemia | F | 31 | Presbyterian | Scottish | Ontario | No Occupation Listed | 174 |
| 24 | oliver | george | M | 33 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 174 |
| 2 | oliver | george | M | 3 | Presbyterian | Scottish | Ontario | No Occupation Listed | 174 |
| 1 | oliver | john | M | 9 | Presbyterian | Scottish | Ontario | No Occupation Listed | 174 |
| 20 | orr | anella | F | 6 | Anglican | Irish | Ontario | No Occupation Listed | 118 |
| 19 | orr | cathrine | F | 10 | Anglican | Irish | Ontario | No Occupation Listed | 118 |
| 17 | orr | edward | M | 15 | Anglican | Irish | Ontario | Clerks in shops and stores | 118 |
| 18 | orr | margret | F | 13 | Anglican | Irish | Ontario | No Occupation Listed | 118 |
| 14 | orr | mary | F | 22 | Anglican | Irish | Ontario | Teachers (unspecified) | 118 |
| 12 | orr | rebecca | F | 42 | Anglican | Irish | Ontario | No Occupation Listed | 118 |
| 15 | orr | rebecca | F | 19 | Anglican | Irish | Ontario | No Occupation Listed | 118 |
| 16 | orr | robert | M | 18 | Anglican | Irish | Ontario | Factory labourers (non-specified manufacturing) | 118 |
| 13 | orr | william | M | 23 | Anglican | Irish | Ontario | Factory labourers (non-specified manufacturing) | 118 |