Residents of Admaston — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 11 | obrey | catherine | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 10 | obrey | joseph | M | 46 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 177 |
| 8 | obrey | louis | M | 72 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 177 |
| 9 | obrey | rosannah | F | 72 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 23 | obryne | bridget | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 325 |
| 24 | obryne | hannah | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 325 |
| 20 | obryne | mary | F | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 325 |
| 25 | obryne | maryan | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 325 |
| 19 | obryne | maurice | M | 29 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 325 |
| 22 | obryne | nickolas | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 325 |
| 21 | obryne | patrick | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 325 |
| 18 | oconner | bridget | F | 60 | Roman Catholic | Irish | Ireland | No Occupation Listed | 19 |
| 8 | oconner | joseph | M | 47 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 97 |
| 19 | oconner | margaret | F | 23 | Roman Catholic | Irish | Ireland | No Occupation Listed | 19 |
| 17 | oconner | mary | F | 30 | Roman Catholic | Irish | Ireland | No Occupation Listed | 19 |
| 9 | oconner | mary | F | 46 | Roman Catholic | Irish | Ireland | No Occupation Listed | 97 |
| 16 | oconner | micheal | M | 21 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 19 |
| 23 | oconnor | denis | M | 36 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 262 |
| 8 | ocormos | james | M | 37 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 319 |
| 9 | ocormos | margarethe | F | 59 | Roman Catholic | Irish | Ireland | No Occupation Listed | 319 |
| 10 | ocormos | mary | F | 30 | Roman Catholic | Irish | Ireland | No Occupation Listed | 319 |
| 21 | odea | edward | M | 24 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 362 |
| 20 | odea | james | M | 26 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 362 |
| 18 | odea | john | M | 65 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 362 |
| 23 | odea | john | M | 28 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 363 |
| 19 | odea | margaret | F | 64 | Roman Catholic | Irish | Ireland | No Occupation Listed | 362 |
| 22 | odea | margaret | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 362 |
| 20 | ohanly | david | M | 58 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 134 |
| 21 | ohanly | dorah | F | 56 | Roman Catholic | Irish | Ireland | No Occupation Listed | 134 |
| 22 | ohanly | margaret | F | 25 | Roman Catholic | Irish | Ireland | No Occupation Listed | 134 |
| 7 | ohare | ann | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 143 |
| 20 | ohare | annie | F | 48 | Roman Catholic | Irish | Ireland | No Occupation Listed | 377 |
| 6 | ohare | bridget | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 143 |
| 5 | ohare | denis | M | 14 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 143 |
| 19 | ohare | denis | M | 50 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 377 |
| 25 | ohare | hugh | M | 24 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 143 |
| 2 | ohare | johannah | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 143 |
| 3 | ohare | john | M | 18 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 143 |
| 8 | ohare | margaret | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 143 |
| 24 | ohare | mary | F | 40 | Roman Catholic | Irish | Ontario | No Occupation Listed | 143 |
| 1 | ohare | mary | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 143 |
| 23 | ohare | patrick | M | 50 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 143 |
| 4 | ohare | patrick | M | 16 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 143 |
| 17 | oleary | bridget | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 152 |
| 16 | oleary | john | M | 40 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 152 |
| 18 | oleary | mary | F | 45 | Roman Catholic | Irish | Ireland | No Occupation Listed | 152 |