Residents of Hemmingford — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 2 | oar | martha | F | 42 | Presbyterian | Irish | Quebec | No Occupation Listed | 20 |
| 10 | oar | robert | M | 43 | Methodist | Irish | Quebec | Farmers, general and nfs | 23 |
| 1 | oar | samuel | M | 49 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 20 |
| 11 | oar | sophia | F | 36 | Methodist | English | Quebec | No Occupation Listed | 23 |
| 3 | obrien | catharine | F | 53 | Roman Catholic | Irish | Ireland | No Occupation Listed | 47 |
| 7 | obrien | elizabeth | F | 8 | Roman Catholic | Irish | Quebec | No Occupation Listed | 47 |
| 6 | obrien | katie | F | 10 | Roman Catholic | Irish | Quebec | No Occupation Listed | 47 |
| 4 | obrien | maggie | F | 17 | Roman Catholic | Irish | Quebec | No Occupation Listed | 47 |
| 2 | obrien | patrick | M | 47 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 47 |
| 5 | obrien | patrick | M | 14 | Roman Catholic | Irish | Quebec | No Occupation Listed | 47 |
| 11 | oconnell | daniel | M | 22 | Roman Catholic | Irish | Quebec | Farmers, general and nfs | 158 |
| 13 | oconnell | edward | M | 15 | Roman Catholic | Irish | Quebec | Farmers, general and nfs | 158 |
| 15 | oconnell | francis | M | 11 | Roman Catholic | Irish | Quebec | No Occupation Listed | 158 |
| 10 | oconnell | joanna | F | 24 | Roman Catholic | Irish | Quebec | No Occupation Listed | 158 |
| 9 | oconnell | mary | F | 48 | Roman Catholic | Irish | Quebec | No Occupation Listed | 158 |
| 14 | oconnell | patrick | M | 13 | Roman Catholic | Irish | Quebec | No Occupation Listed | 158 |
| 8 | oconnell | timothy | M | 55 | Roman Catholic | Irish | United States | Farmers, general and nfs | 158 |
| 12 | oconnell | timothy | M | 17 | Roman Catholic | Irish | Quebec | Farmers, general and nfs | 158 |
| 18 | oconnell | william | M | 68 | Roman Catholic | Irish | Ireland | No Occupation Listed | 120 |
| 8 | odell | albert | M | 28 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 89 |
| 4 | odell | eveline | F | 16 | Presbyterian | Irish | Quebec | No Occupation Listed | 88 |
| 6 | odell | hannah | F | 69 | Presbyterian | Irish | Quebec | No Occupation Listed | 89 |
| 5 | odell | hiram | M | 13 | Presbyterian | Irish | Quebec | No Occupation Listed | 88 |
| 7 | odell | joseph | M | 31 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 89 |
| 2 | odell | juleues | M | 19 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 88 |
| 1 | odell | margaret | F | 56 | Presbyterian | Irish | Ireland | No Occupation Listed | 88 |
| 3 | odell | mary | F | 21 | Presbyterian | Irish | Quebec | No Occupation Listed | 88 |
| 25 | odell | william | M | 64 | Presbyterian | Canadian | Quebec | Farmers, general and nfs | 88 |
| 15 | oldfield | mary | F | 72 | Episcopal | Irish | Ireland | No Occupation Listed | 58 |
| 14 | oldfield | michael | M | 82 | Episcopal | Irish | Ireland | Labourers nfs | 58 |
| 10 | omeara | mary | F | 28 | Roman Catholic | Irish | Quebec | Servants nfs | 177 |
| 7 | oneill | henry | M | 43 | Presbyterian | Irish | Quebec | Manufacturers | 43 |
| 9 | oneill | henry | M | 15 | Presbyterian | Irish | Quebec | No Occupation Listed | 43 |
| 8 | oneill | jane | F | 38 | Presbyterian | Irish | Quebec | No Occupation Listed | 43 |
| 11 | oneill | owen | M | 22 | Roman Catholic | Irish | United States | river drivers | 148 |
| 4 | orr | albert | M | 23 | Presbyterian | Irish | Quebec | Hotel Keepers and Managers | 146 |
| 2 | orr | alexander | M | 13 | Presbyterian | Irish | Quebec | No Occupation Listed | 70 |
| 11 | orr | angus | M | 8 | Presbyterian | Irish | Quebec | No Occupation Listed | 46 |
| 11 | orr | ann | F | 45 | Anglican | Irish | Ireland | Farmers, general and nfs | 77 |
| 10 | orr | charles | M | 10 | Presbyterian | Irish | Quebec | No Occupation Listed | 46 |
| 7 | orr | david | M | 89 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 71 |
| 20 | orr | ellen | F | 62 | Presbyterian | Irish | Ireland | No Occupation Listed | 144 |
| 9 | orr | ellinor | F | 16 | Presbyterian | Irish | Quebec | No Occupation Listed | 71 |
| 1 | orr | emma | F | 11 | Methodist | Irish | Quebec | No Occupation Listed | 172 |
| 12 | orr | george | M | 6 | Presbyterian | Irish | Quebec | No Occupation Listed | 46 |
| 10 | orr | george | M | 14 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 71 |
| 6 | orr | gertrude | F | 0 | Methodist | Irish | Quebec | No Occupation Listed | 172 |
| 1 | orr | hannah | F | 38 | Presbyterian | Irish | Ireland | No Occupation Listed | 70 |
| 4 | orr | hugh | M | 6 | Methodist | Irish | Quebec | No Occupation Listed | 172 |
| 2 | orr | james | M | 10 | Methodist | Irish | Quebec | No Occupation Listed | 172 |
| 14 | orr | john | M | 3 | Presbyterian | Irish | Quebec | No Occupation Listed | 71 |
| 15 | orr | john | M | 88 | Presbyterian | Irish | Ireland | No Occupation Listed | 71 |
| 23 | orr | john | M | 82 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 172 |
| 24 | orr | john | M | 37 | Methodist | Irish | Quebec | Farmers, general and nfs | 172 |
| 25 | orr | joseph | M | 45 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 70 |
| 5 | orr | joseph | M | 1 | Presbyterian | Irish | Quebec | No Occupation Listed | 70 |
| 12 | orr | katherine | F | 7 | Presbyterian | Irish | Quebec | No Occupation Listed | 71 |
| 4 | orr | lauisa | F | 8 | Presbyterian | Irish | Quebec | No Occupation Listed | 70 |
| 11 | orr | laura | F | 9 | Presbyterian | Irish | United States | No Occupation Listed | 71 |
| 25 | orr | martha | F | 33 | Methodist | Irish | Quebec | No Occupation Listed | 172 |
| 3 | orr | mattie | F | 8 | Methodist | Irish | Quebec | No Occupation Listed | 172 |
| 3 | orr | nancy | F | 17 | Presbyterian | Irish | Quebec | Servants nfs | 59 |
| 8 | orr | olaiva | F | 38 | Presbyterian | Scottish | United States | No Occupation Listed | 71 |
| 12 | orr | orr | M | 7 | Anglican | Irish | Quebec | No Occupation Listed | 77 |
| 13 | orr | robert | M | 4 | Presbyterian | Irish | Quebec | No Occupation Listed | 46 |
| 3 | orr | robert | M | 10 | Presbyterian | Irish | Quebec | No Occupation Listed | 70 |
| 2 | orr | sarah | F | 20 | Presbyterian | Irish | Quebec | Servants nfs | 59 |
| 8 | orr | thomas | M | | Presbyterian | Irish | Quebec | Farmers, general and nfs | 46 |
| 19 | orr | thomas | M | 61 | Presbyterian | Irish | Ireland | Carpenters | 144 |
| 21 | orr | thomas | M | 21 | Presbyterian | Irish | Quebec | Farmers, general and nfs | 144 |
| 9 | orr | william | M | 12 | Presbyterian | Irish | Quebec | No Occupation Listed | 46 |
| 13 | orr | william | M | 5 | Presbyterian | Irish | Quebec | No Occupation Listed | 71 |
| 5 | orr | william | M | 4 | Methodist | Irish | Quebec | No Occupation Listed | 172 |