Residents of Enniskillen — Sub-district D, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 14 | oconnor | annie | F | 46 | Roman Catholic | Irish | Ireland | No Occupation Listed | 632 |
| 13 | oconnor | edward | M | 26 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 632 |
| 17 | oconnor | john | M | 16 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 632 |
| 16 | oconnor | mary | F | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 632 |
| 15 | oconnor | micheal | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 632 |
| 18 | oconnor | paterick | M | 14 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 632 |
| 19 | oconnor | william | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 632 |
| 12 | odell | annie | F | 14 | Episcopal Methodist | English | England | No Occupation Listed | 362 |
| 24 | odell | emley | F | 26 | Episcopal Methodist | German | Ontario | No Occupation Listed | 561 |
| 5 | odell | george | M | 49 | Episcopal Methodist | English | England | Farmers, general and nfs | 362 |
| 7 | odell | george | M | 27 | Episcopal Methodist | English | England | Farmers, general and nfs | 362 |
| 8 | odell | henry | M | 23 | Episcopal Methodist | English | England | Farmers, general and nfs | 362 |
| 23 | odell | james | M | 30 | Episcopal Methodist | English | England | Labourers nfs | 561 |
| 11 | odell | janie | F | 16 | Episcopal Methodist | English | England | No Occupation Listed | 362 |
| 2 | odell | martha | F | 1 | Episcopal Methodist | English | Ontario | No Occupation Listed | 561 |
| 25 | odell | mary | F | 7 | Episcopal Methodist | English | Ontario | No Occupation Listed | 561 |
| 1 | odell | samuel | M | 5 | Episcopal Methodist | English | Ontario | No Occupation Listed | 561 |
| 13 | odell | sarah | F | 12 | Episcopal Methodist | English | England | No Occupation Listed | 362 |
| 6 | odell | susan | F | 48 | Episcopal Methodist | English | England | No Occupation Listed | 362 |
| 9 | odell | susan | F | 21 | Episcopal Methodist | English | England | No Occupation Listed | 362 |
| 14 | odell | thomas | M | 9 | Episcopal Methodist | English | Ontario | No Occupation Listed | 362 |
| 10 | odell | william | M | 19 | Episcopal Methodist | English | England | Farmers, general and nfs | 362 |
| 1 | oliver | alexander | M | 13 | Presbyterian | Scottish | Ontario | No Occupation Listed | 59 |
| 23 | oliver | fanny | F | 21 | Presbyterian | Irish | Ontario | No Occupation Listed | 59 |
| 24 | oliver | isaac | M | 19 | Presbyterian | Irish | Ontario | No Occupation Listed | 59 |
| 22 | oliver | john | F | 27 | Presbyterian | Irish | Ontario | No Occupation Listed | 59 |
| 2 | oliver | laurie | F | 3 | Presbyterian | Scottish | Ontario | No Occupation Listed | 59 |
| 21 | oliver | rebecca | F | 56 | Presbyterian | Irish | Ireland | Matrons | 59 |
| 25 | oliver | robert | M | 15 | Presbyterian | Irish | Ontario | No Occupation Listed | 59 |
| 21 | olver | francis | M | | Anglican | English | Ontario | No Occupation Listed | 197 |
| 22 | olver | george | M | | Anglican | English | Ontario | No Occupation Listed | 197 |
| 16 | olver | john | M | 30 | Anglican | English | Ontario | Boot and shoemakers and repairers | 197 |
| 19 | olver | mary | F | | | Blank | Ontario | No Occupation Listed | 197 |
| 17 | olver | sable | F | 27 | Anglican | English | Ontario | No Occupation Listed | 197 |
| 18 | olver | sarah | F | 9 | Anglican | English | Ontario | No Occupation Listed | 197 |
| 20 | olver | william | M | | Anglican | English | Ontario | No Occupation Listed | 197 |
| 19 | oneil | emma | F | 19 | Methodist | Irish | Ontario | No Occupation Listed | 46 |
| 18 | oneil | neil | M | 27 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 46 |
| 20 | oneil | robert | M | 0 | Methodist | Irish | Ontario | No Occupation Listed | 46 |
| 22 | orens | charles | M | 28 | Presbyterian | Scottish | Quebec | Farmers, general and nfs | 447 |
| 24 | ormerod | henry | M | 23 | Primitive Methodist | English | Ontario | Farmers, general and nfs | 29 |
| 25 | ormerod | mary | F | 17 | Primitive Methodist | English | Ontario | No Occupation Listed | 29 |
| 3 | ormrod | david | M | 0 | Primitive Methodist | English | Ontario | No Occupation Listed | 30 |
| 2 | ormrod | elizabeth | F | 19 | Primitive Methodist | English | Ontario | No Occupation Listed | 30 |
| 1 | ormrod | john | M | 25 | Primitive Methodist | English | Ontario | Farmers, general and nfs | 30 |
| 23 | osborne | alexander | M | 22 | Methodist | English | Ontario | Labourers nfs | 609 |
| 25 | ovens | charles | M | 6 | Presbyterian | Scottish | Ontario | No Occupation Listed | 7 |
| 6 | ovens | david | M | 8 | Presbyterian | Scottish | Ontario | No Occupation Listed | 8 |
| 22 | ovens | elizabeth | F | 40 | Presbyterian | Scottish | Quebec | No Occupation Listed | 7 |
| 5 | ovens | euphemia | F | 28 | Presbyterian | Scottish | Ontario | No Occupation Listed | 8 |
| 1 | ovens | isabella | F | 5 | Presbyterian | Scottish | Ontario | No Occupation Listed | 7 |
| 9 | ovens | jane | F | 1 | Presbyterian | Scottish | Ontario | No Occupation Listed | 8 |
| 24 | ovens | jennett | F | 8 | Presbyterian | Scottish | Ontario | No Occupation Listed | 7 |
| 21 | ovens | john | M | 41 | Presbyterian | Scottish | Quebec | Farmers, general and nfs | 7 |
| 3 | ovens | margaret | F | 0 | Presbyterian | Scottish | Ontario | No Occupation Listed | 7 |
| 7 | ovens | margret | F | 6 | Presbyterian | Scottish | Ontario | No Occupation Listed | 8 |
| 23 | ovens | mariah | F | 10 | Presbyterian | Scottish | Quebec | No Occupation Listed | 7 |
| 2 | ovens | mary | F | 3 | Presbyterian | Scottish | Ontario | No Occupation Listed | 7 |
| 8 | ovens | thomas | M | 3 | Presbyterian | Scottish | Ontario | No Occupation Listed | 8 |
| 4 | ovens | william | M | 33 | Presbyterian | Scottish | Quebec | Farmers, general and nfs | 8 |