Residents of Alice & Fraser — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 22 | obrian | bridget | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 276 |
| 20 | obrian | henery | M | 77 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 276 |
| 21 | obrian | jane | F | 55 | Roman Catholic | Irish | Ireland | No Occupation Listed | 276 |
| 11 | ohara | elizabeth | F | 21 | Baptist | Irish | Ontario | Teachers (unspecified) | 17 |
| 13 | oleary | catharine | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 11 | oleary | edward | M | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 6 | oleary | james | M | 40 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 274 |
| 7 | oleary | julie | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 8 | oleary | margaret | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 14 | oleary | martha | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 12 | oleary | mary | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 4 | oleary | michael | M | 67 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 252 |
| 9 | oleary | michael | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 10 | oleary | thomas | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 274 |
| 16 | oloughlan | lawrence | M | 34 | Roman Catholic | Irish | Ontario | Lumberers and loggers | 321 |
| 25 | omara | anne | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 3 | omara | elizabeth | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 1 | omara | ellen | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 4 | omara | loretta | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 22 | omara | margaret | F | 42 | Roman Catholic | Irish | Ireland | No Occupation Listed | 78 |
| 2 | omara | margaret | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 24 | omara | mary | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 21 | omara | patrick | M | 53 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 78 |
| 5 | omara | patrick | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 23 | omara | william | M | 25 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 78 |