Residents of Mulmur — Sub-district D, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 13 | oconnor | cornelius | M | 14 | Roman Catholic | Irish | Ontario | Ambiguous responses | 221 |
| 12 | oconnor | hannah | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 221 |
| 14 | oconnor | jane | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 221 |
| 8 | oconnor | john | M | 50 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 221 |
| 9 | oconnor | mary | F | 40 | Roman Catholic | Irish | Ontario | No Occupation Listed | 221 |
| 16 | oconnor | mary | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 221 |
| 15 | oconnor | micheal | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 221 |
| 10 | oconnor | patrick | M | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 221 |
| 11 | oconnor | thomas | M | 16 | Roman Catholic | Irish | Ontario | Ambiguous responses | 221 |
| 19 | oflynn | allace | F | 4 | Presbyterian | Irish | Ontario | No Occupation Listed | 210 |
| 21 | oflynn | ethel | F | 1 | Presbyterian | Irish | Ontario | No Occupation Listed | 210 |
| 17 | oflynn | frank | M | 31 | Presbyterian | Irish | Ontario | Millers and related workers | 210 |
| 20 | oflynn | john | M | 2 | Presbyterian | Irish | Ontario | No Occupation Listed | 210 |
| 18 | oflynn | margaret | F | 24 | Presbyterian | Scottish | Ontario | No Occupation Listed | 210 |
| 9 | olliver | ann | F | 58 | Presbyterian | Irish | Ireland | No Occupation Listed | 292 |
| 16 | olliver | catharine | F | 14 | Presbyterian | Irish | Ontario | No Occupation Listed | 292 |
| 10 | olliver | elizabeth | F | 26 | Presbyterian | Irish | Nova Scotia | No Occupation Listed | 292 |
| 11 | olliver | james | M | 22 | Presbyterian | Irish | United States | No Occupation Listed | 292 |
| 13 | olliver | jane | F | 19 | Presbyterian | Irish | Ontario | No Occupation Listed | 292 |
| 8 | olliver | joseph | M | 59 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 292 |
| 15 | olliver | joseph | M | 16 | Presbyterian | Irish | Ontario | Ambiguous responses | 292 |
| 18 | olliver | margaret | F | 10 | Presbyterian | Irish | Ontario | No Occupation Listed | 292 |
| 14 | olliver | robert | M | 18 | Presbyterian | Irish | Ontario | Ambiguous responses | 292 |
| 12 | olliver | sarah | F | 21 | Presbyterian | Irish | Ontario | No Occupation Listed | 292 |
| 19 | olliver | sharlott | F | 8 | Presbyterian | Irish | Ontario | No Occupation Listed | 292 |
| 17 | olliver | thomas | M | 12 | Presbyterian | Irish | Ontario | No Occupation Listed | 292 |
| 20 | ormsby | christopher | M | 43 | Anglican | Irish | Ireland | Farmers, general and nfs | 161 |
| 12 | ormsby | eliza | F | 38 | Anglican | Irish | Ontario | No Occupation Listed | 159 |
| 15 | ormsby | george | M | 8 | Anglican | Irish | Ontario | No Occupation Listed | 159 |
| 17 | ormsby | isaiah | M | 4 | Anglican | Irish | Ontario | No Occupation Listed | 159 |
| 19 | ormsby | jane | F | 30 | Anglican | Irish | Ireland | No Occupation Listed | 160 |
| 13 | ormsby | john | M | 15 | Anglican | Irish | Ontario | No Occupation Listed | 159 |
| 18 | ormsby | john | M | 37 | Anglican | Irish | Ireland | Farmers, general and nfs | 160 |
| 11 | ormsby | robert | M | 40 | Anglican | Irish | Ireland | Farmers, general and nfs | 159 |
| 14 | ormsby | robert | M | 13 | Anglican | Irish | Ontario | No Occupation Listed | 159 |
| 16 | ormsby | susan | F | 6 | Anglican | Irish | Ontario | No Occupation Listed | 159 |
| 17 | orr | albert | M | 7 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 16 | orr | ana | F | 3 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 15 | orr | ann | F | 20 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 2 | orr | charlot | F | 19 | Methodist | Irish | Ontario | No Occupation Listed | 137 |
| 3 | orr | easter | F | 1 | Methodist | Irish | Ontario | No Occupation Listed | 137 |
| 10 | orr | elisabeth | F | 42 | Presbyterian | Irish | Ireland | No Occupation Listed | 145 |
| 11 | orr | elisabeth | F | 18 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 14 | orr | ellen | F | 48 | Presbyterian | Irish | Ireland | No Occupation Listed | 129 |
| 9 | orr | james | M | 45 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 145 |
| 12 | orr | margaret | F | 17 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 16 | orr | mary | F | 18 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 21 | orr | mary | F | 37 | Presbyterian | Irish | Ontario | No Occupation Listed | 134 |
| 22 | orr | mary | F | 15 | Presbyterian | Irish | Ontario | No Occupation Listed | 134 |
| 14 | orr | mary | F | 8 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 13 | orr | robert | M | 13 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 13 | orr | samuel | M | 50 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 129 |
| 1 | orr | william | M | 26 | Methodist | Irish | Ireland | Farmers, general and nfs | 137 |
| 15 | orr | william | M | 5 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 16 | owen | thomas | M | 10 | Methodist | English | England | No Occupation Listed | 202 |