Residents of Pittsburg — Sub-district E, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 2 | _ot | ann | F | 53 | Anglican | Scottish | Scotland | No Occupation Listed | 1 |
| 4 | _ot | edward | M | 23 | Anglican | English | Ontario | No Occupation Listed | 1 |
| 1 | _ot | henry | M | 54 | Anglican | English | Ontario | Farmers, general and nfs | 1 |
| 3 | _ot | john | M | 25 | Anglican | English | Ontario | No Occupation Listed | 1 |
| 6 | _ot | joseph | M | 16 | Anglican | English | Ontario | No Occupation Listed | 1 |
| 7 | _ot | william | M | 14 | Anglican | English | Ontario | No Occupation Listed | 1 |
| 5 | _ot | | M | 24 | Anglican | English | Ontario | No Occupation Listed | 1 |
| 13 | oborrnan | francis | M | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 146 |
| 10 | oborrnan | james | M | 40 | Roman Catholic | Irish | Ireland | Contractors (and builders, U.S.) | 146 |
| 11 | oborrnan | kathrine | F | 81 | Roman Catholic | Irish | Ireland | No Occupation Listed | 146 |
| 12 | oborrnan | miria | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 146 |
| 23 | ogrey | annie | F | 10 | Anglican | English | Ontario | No Occupation Listed | 177 |
| 22 | ogrey | henry | M | 13 | Anglican | English | Ontario | No Occupation Listed | 177 |
| 21 | ogrey | james | M | 14 | Anglican | English | Ontario | Labourers nfs | 177 |
| 25 | oreily | mary | F | 24 | Roman Catholic | Irish | Ontario | Servants nfs | 210 |
| 24 | orr | annie | F | 17 | Presbyterian | Irish | Ontario | No Occupation Listed | 43 |
| 21 | orr | cathrine | F | 46 | Presbyterian | Scottish | Scotland | No Occupation Listed | 43 |
| 2 | orr | henry | M | 13 | Presbyterian | Scottish | Ontario | No Occupation Listed | 43 |
| 20 | orr | james | M | 49 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 43 |
| 22 | orr | james | M | 24 | Presbyterian | Irish | Ontario | Coach, carriage, cart and wagon makers | 43 |
| 3 | orr | jane | F | 8 | Presbyterian | Scottish | Ontario | No Occupation Listed | 43 |
| 25 | orr | katie | F | 17 | Presbyterian | Irish | Ontario | No Occupation Listed | 43 |
| 1 | orr | robert | M | 15 | Presbyterian | Scottish | Ontario | No Occupation Listed | 43 |
| 23 | orr | tayler | M | 22 | Presbyterian | Irish | Ontario | Coach, carriage, cart and wagon makers | 43 |