Residents of Malahide — Sub-district D, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 6 | obrien | catherine | F | 23 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 4 | obrien | eliza | F | 46 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 10 | obrien | eliza | F | 9 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 23 | obrien | eliza | F | 17 | Methodist | Irish | Ontario | Tailors and tailoresses | 69 |
| 1 | obrien | george | M | 8 | Methodist | Irish | Ontario | No Occupation Listed | 69 |
| 25 | obrien | isabella | F | 10 | Methodist | Irish | Ontario | No Occupation Listed | 69 |
| 9 | obrien | john | M | 15 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 24 | obrien | mary | F | 12 | Methodist | Irish | Ontario | No Occupation Listed | 69 |
| 3 | obrien | morris | M | 52 | Methodist | Irish | Ontario | Farmers, general and nfs | 234 |
| 7 | obrien | morris | M | 19 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 5 | obrien | ruth | F | 25 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 22 | obrien | sarah | F | 40 | Methodist | Irish | Ireland | No Occupation Listed | 69 |
| 8 | obrien | thomas | M | 17 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 21 | obrien | william | M | 60 | Anglican | Irish | Ireland | Farmers, general and nfs | 69 |
| 21 | obryan | emma | F | 18 | Episcopal Methodist | Irish | Ontario | No Occupation Listed | 235 |
| 20 | obryan | james | M | 22 | Episcopal Methodist | Irish | Ontario | river drivers | 235 |
| 2 | ofield | thomas | M | 33 | Anglican | English | Ontario | Farmers, general and nfs | 293 |
| 18 | oles | ernest | M | 19 | Anglican | Unknown | Ontario | river drivers | 347 |
| 12 | ostrander | frank | M | 12 | Anglican | German | Ontario | No Occupation Listed | 81 |
| 20 | ostrander | frank | M | 11 | Baptist | German | Ontario | Farmers, general and nfs | 321 |
| 12 | ostrander | guy | M | 0 | Roman Catholic | Scottish | Ontario | No Occupation Listed | 288 |
| 17 | ostrander | isaac | M | 54 | Baptist | German | Ontario | Farmers, general and nfs | 321 |
| 11 | ostrander | jane | F | 29 | Roman Catholic | Scottish | Ontario | No Occupation Listed | 288 |
| 19 | ostrander | lettie | F | 16 | Baptist | German | Ontario | Farmers, general and nfs | 321 |
| 9 | ostrander | margaret | F | 79 | Baptist | Irish | Ontario | No Occupation Listed | 81 |
| 18 | ostrander | sarah | F | 45 | Baptist | German | Ontario | Farmers, general and nfs | 321 |
| 10 | ostrander | sylvester | M | 40 | Anglican | German | Ontario | Farmers, general and nfs | 81 |
| 8 | ostrander | thadias | M | 88 | Baptist | German | Ontario | No Occupation Listed | 81 |
| 10 | ostrander | w | M | 28 | Roman Catholic | German | Ontario | Farmers, general and nfs | 288 |
| 11 | ostrander | wm | M | 30 | Anglican | German | Ontario | No Occupation Listed | 81 |