Residents of Dunham — Sub-district H, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 9 | obonie | francis | M | 10 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 10 | obonie | james | M | 8 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 15 | obonie | joana | F | 0 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 8 | obonie | mary | F | 32 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 14 | obonie | mary | F | 2 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 7 | obonie | michael | M | 26 | Roman Catholic | Irish | Canada | Labourers nfs | 90 |
| 12 | obonie | michael | M | 5 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 13 | obonie | pahis | M | 3 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 11 | obonie | thomas | M | 6 | Roman Catholic | Irish | Canada | No Occupation Listed | 90 |
| 1 | oborin | allise | F | 32 | Anglican | Irish | Quebec | No Occupation Listed | 55 |
| 23 | oborin | alonzo | M | 30 | Anglican | Irish | Quebec | Farmers, general and nfs | 55 |
| 22 | oborin | evaline | F | 63 | Anglican | American | United States | No Occupation Listed | 55 |
| 2 | oborin | maryann | F | 20 | Anglican | Irish | Quebec | No Occupation Listed | 55 |
| 24 | oborin | ottis | M | 22 | Anglican | Irish | Quebec | Farmers, general and nfs | 55 |
| 21 | oborin | robt | M | 60 | Anglican | Irish | Ireland | Farmers, general and nfs | 55 |
| 25 | oborin | william | M | 17 | Anglican | Irish | Quebec | No Occupation Listed | 55 |
| 8 | obrien | aggie | F | 5 | Roman Catholic | Irish | Quebec | No Occupation Listed | 123 |
| 4 | obrien | caroline | F | 17 | Roman Catholic | Irish | Quebec | No Occupation Listed | 123 |
| 7 | obrien | eliza | F | 8 | Roman Catholic | Irish | Quebec | No Occupation Listed | 123 |
| 5 | obrien | erastus | M | 12 | Roman Catholic | Irish | Quebec | No Occupation Listed | 123 |
| 3 | obrien | ivy | F | 19 | Roman Catholic | Irish | Quebec | Teachers (unspecified) | 123 |
| 1 | obrien | john | M | 47 | Roman Catholic | Irish | Quebec | Farmers, general and nfs | 123 |
| 9 | obrien | kate | F | 70 | Anglican | Irish | Ireland | No Occupation Listed | 101 |
| 8 | obrien | kennedy | M | 86 | Anglican | Irish | Ireland | Farmers, general and nfs | 101 |
| 6 | obrien | marcus | M | 10 | Roman Catholic | Irish | Quebec | No Occupation Listed | 123 |
| 2 | obrien | mary | F | 38 | Roman Catholic | Irish | Quebec | No Occupation Listed | 123 |
| 9 | obrien | roselle | F | 3 | Roman Catholic | Irish | Quebec | No Occupation Listed | 123 |
| 1 | obrine | hugh | M | 32 | Anglican | Irish | Quebec | Farmers, general and nfs | 16 |
| 12 | ohaloran | anna | F | 15 | Anglican | Irish | Quebec | No Occupation Listed | 12 |
| 10 | ohaloran | edward | M | 20 | Anglican | Irish | Quebec | No Occupation Listed | 12 |
| 9 | ohaloran | elizabeth | F | 25 | Anglican | Irish | Quebec | No Occupation Listed | 12 |
| 11 | ohaloran | george | M | 17 | Anglican | Irish | Quebec | No Occupation Listed | 12 |
| 7 | ohaloran | james | M | 59 | Roman Catholic | Irish | Ireland | advocate | 12 |
| 13 | ohaloran | james | M | 12 | Anglican | Irish | Quebec | No Occupation Listed | 12 |
| 14 | ohaloran | joseph | M | 4 | Anglican | Irish | Quebec | No Occupation Listed | 12 |
| 8 | ohaloran | mary | F | 47 | Anglican | Irish | Quebec | No Occupation Listed | 12 |
| 16 | ohegan | sara | F | 70 | Roman Catholic | Irish | Ireland | No Occupation Listed | 117 |
| 14 | oldall | elizabeth | F | 41 | Methodist | English | Nova Scotia | No Occupation Listed | 112 |
| 19 | oldall | james | M | 9 | Methodist | English | Quebec | No Occupation Listed | 112 |
| 18 | oldall | may | F | 12 | Methodist | English | Quebec | No Occupation Listed | 112 |
| 17 | oldall | nellie | F | 14 | Methodist | English | Quebec | No Occupation Listed | 112 |
| 16 | oldall | oscar | M | 17 | Methodist | English | Ontario | No Occupation Listed | 112 |
| 21 | oldall | sarah | F | 3 | Methodist | English | Quebec | No Occupation Listed | 112 |
| 13 | oldall | sidney | M | 42 | Methodist | English | England | Dealer, merchant etc. (Wholesale & retail trade) | 112 |
| 20 | oldall | sidney | M | 5 | Methodist | English | Quebec | No Occupation Listed | 112 |
| 15 | oldall | william | M | 20 | Methodist | English | Ontario | Clerk, nfs | 112 |
| 20 | oliver | adam | M | 48 | Congregationalist | Scottish | Quebec | Dealer, merchant etc. (Wholesale & retail trade) | 27 |
| 24 | oliver | alfred | M | 16 | Congregationalist | Scottish | Quebec | No Occupation Listed | 27 |
| 21 | oliver | anna | F | 46 | Congregationalist | English | Quebec | No Occupation Listed | 27 |
| 23 | oliver | jennie | F | 19 | Congregationalist | Scottish | Quebec | No Occupation Listed | 27 |
| 22 | oliver | william | M | 22 | Congregationalist | Scottish | Quebec | Clerk, nfs | 27 |
| 11 | oneill | anna | F | 78 | Roman Catholic | Irish | Ireland | No Occupation Listed | 160 |
| 10 | oneill | martin | M | 38 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 160 |
| 12 | oneill | william | M | 16 | Roman Catholic | Irish | Quebec | No Occupation Listed | 160 |
| 20 | orderway | casey | F | 20 | Wesleyan Methodist | English | Quebec | No Occupation Listed | 43 |
| 19 | orderway | frank | M | 25 | Wesleyan Methodist | English | United States | river drivers | 43 |
| 20 | outelle | joseph | M | 21 | Roman Catholic | French | Quebec | Printers nfs | 93 |
| 15 | ovitt | almon | M | 27 | Episcopal | American | United States | Labourers nfs | 127 |
| 16 | ovitt | emma | F | 34 | Episcopal | American | United States | No Occupation Listed | 127 |