Residents of Pakenham — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 22 | obrien | george | M | 51 | Roman Catholic | Irish | Ontario | Hotel Keepers and Managers | 4 |
| 23 | obrien | mary | F | 40 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 18 | oconnor | christopher | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 13 | oconnor | danial | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 9 | oconnor | daniel | M | 40 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 49 |
| 15 | oconnor | dennis | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 16 | oconnor | francis | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 12 | oconnor | john | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 11 | oconnor | nellie | F | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 17 | oconnor | patrick | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 10 | oconnor | sarah | F | 36 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 14 | oconnor | timothy | M | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 19 | oconnor | timothy | M | 90 | Roman Catholic | Irish | Ireland | No Occupation Listed | 49 |
| 17 | oneil | andrew | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 45 |
| 13 | oneil | ann | F | 55 | Roman Catholic | Irish | Ireland | No Occupation Listed | 45 |
| 7 | oneil | annie | F | 22 | Anglican | Irish | Ontario | Teachers (unspecified) | 153 |
| 15 | oneil | charles | M | 4 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 12 | oneil | florence | F | 13 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 11 | oneil | george | M | 15 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 6 | oneil | isabella | F | 48 | Anglican | Scottish | Ontario | No Occupation Listed | 153 |
| 10 | oneil | isabella | F | 16 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 16 | oneil | james | M | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 45 |
| 8 | oneil | james | M | 21 | Anglican | Irish | Ontario | Clerk, nfs | 153 |
| 9 | oneil | jennie | F | 19 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 12 | oneil | john | M | 68 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 45 |
| 14 | oneil | john | M | 28 | Roman Catholic | Irish | Ontario | river drivers | 45 |
| 5 | oneil | john | M | 48 | Anglican | Irish | Ireland | Coach, carriage, cart and wagon makers | 153 |
| 13 | oneil | john | M | 10 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 15 | oneil | maria | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 45 |
| 16 | oneil | ruby | M | 0 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 18 | oneil | sarah | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 45 |
| 14 | oneil | sarah | F | 12 | Anglican | Irish | Ontario | No Occupation Listed | 153 |
| 17 | oneil | sarah | F | | Anglican | Irish | Ontario | Tailors and tailoresses | 153 |
| 9 | orr | alexander | M | 2 | Anglican | Irish | Ontario | No Occupation Listed | 57 |
| 10 | orr | john | M | 0 | Anglican | Irish | Ontario | No Occupation Listed | 57 |
| 4 | orr | mary | F | 28 | Anglican | Irish | Ontario | No Occupation Listed | 57 |
| 6 | orr | robert | M | 7 | Anglican | Irish | Ontario | No Occupation Listed | 57 |
| 7 | orr | samuel | M | 5 | Anglican | Irish | Ontario | No Occupation Listed | 57 |
| 5 | orr | sarah | F | 9 | Anglican | Irish | Ontario | No Occupation Listed | 57 |
| 3 | orr | william | M | 40 | Anglican | Irish | Ireland | Farmers, general and nfs | 57 |
| 8 | orr | william | M | 4 | Anglican | Irish | Ontario | No Occupation Listed | 57 |