Residents of Dorchester N — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 8 | oakley | alfred | M | 28 | Anglican | English | England | Labourers nfs | 117 |
| 10 | oakley | alfred | M | 4 | Anglican | English | Ontario | No Occupation Listed | 117 |
| 11 | oakley | benjaman | M | 3 | Anglican | English | Ontario | No Occupation Listed | 117 |
| 12 | oakley | harriett | F | 1 | Anglican | English | Ontario | No Occupation Listed | 117 |
| 9 | oakley | sarah | F | 28 | Anglican | English | Ontario | No Occupation Listed | 117 |
| 2 | odell | james | M | 2 | Reformed Baptist | English | Ontario | No Occupation Listed | 172 |
| 1 | odell | mary | F | 24 | Reformed Baptist | Scottish | Ontario | No Occupation Listed | 172 |
| 25 | odell | thomas | M | 24 | Episcopal Methodist | English | Ontario | Farmers, general and nfs | 172 |
| 21 | ogilvie | margret | F | 43 | Presbyterian | Scottish | Scotland | Servants nfs | 86 |
| 2 | ohara | henry | M | 18 | Roman Catholic | Irish | Ontario | Labourers nfs | 121 |
| 6 | oliver | adam | M | 13 | Methodist | Irish | Ontario | No Occupation Listed | 102 |
| 3 | oliver | catharin | F | 31 | Methodist | Irish | Ontario | No Occupation Listed | 102 |
| 23 | oliver | james | M | 29 | Methodist | Irish | Ontario | Farmers, general and nfs | 93 |
| 5 | oliver | john | M | 17 | Methodist | Irish | Ontario | Farmers, general and nfs | 102 |
| 25 | oliver | noble | M | 22 | Methodist | Irish | Ontario | Farmers, general and nfs | 93 |
| 24 | oliver | pheobe | F | 35 | Methodist | Irish | United States | No Occupation Listed | 93 |
| 4 | oliver | samuel | M | 22 | Methodist | Irish | Ontario | Farmers, general and nfs | 102 |
| 2 | oliver | sarah | F | 56 | Methodist | Irish | United States | No Occupation Listed | 102 |
| 7 | oliver | sarah | F | 9 | Methodist | Irish | Ontario | No Occupation Listed | 102 |
| 22 | oliver | william | M | 31 | Methodist | Irish | Ontario | Farmers, general and nfs | 93 |
| 1 | oliver | william | M | 81 | Methodist | Irish | Ireland | Farmers, general and nfs | 102 |
| 10 | oneil | ann | F | 56 | Anglican | English | United States | No Occupation Listed | 257 |
| 13 | oneil | charlotte | F | 5 | Methodist | Irish | Ontario | No Occupation Listed | 39 |
| 9 | oneil | cordelia | F | 6 | Anglican | English | Ontario | No Occupation Listed | 256 |
| 11 | oneil | eliza | F | 36 | Methodist | English | Ontario | No Occupation Listed | 39 |
| 14 | oneil | frederick | M | 2 | Methodist | Irish | Ontario | No Occupation Listed | 39 |
| 10 | oneil | james | M | 44 | Methodist | Irish | Ontario | Labourers nfs | 39 |
| 12 | oneil | lecretia | F | 7 | Methodist | Irish | Ontario | No Occupation Listed | 39 |
| 20 | oneil | mary | F | 22 | Methodist | Dutch | Ontario | No Occupation Listed | 10 |
| 21 | oneil | mary | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 81 |
| 8 | oneil | mary | F | 27 | Anglican | English | Ontario | No Occupation Listed | 256 |
| 20 | oneil | robert | M | 25 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 81 |
| 11 | oneil | sarah | F | 26 | Anglican | English | Ontario | No Occupation Listed | 257 |
| 25 | oneil | sharlott | F | 15 | Anglican | Irish | Ontario | No Occupation Listed | 213 |
| 7 | oneil | william | M | 38 | Anglican | English | Ontario | Farmers, general and nfs | 256 |
| 14 | orchard | ellen | F | 50 | Anglican | Irish | Ireland | No Occupation Listed | 175 |
| 13 | orchard | john | M | 60 | Anglican | English | England | Dealer, merchant etc. (Wholesale & retail trade) | 175 |
| 16 | orchard | john | M | 14 | Anglican | English | Ontario | No Occupation Listed | 175 |
| 15 | orchard | mary | F | 17 | Anglican | English | Ontario | No Occupation Listed | 175 |
| 3 | ovens | howard | M | 30 | Methodist | Irish | Ontario | Farmers, general and nfs | 188 |
| 7 | ovens | margret | F | 55 | Church of Scotland | Irish | Ireland | No Occupation Listed | 159 |
| 4 | ovens | mary | F | 34 | Anglican | Irish | Ontario | No Occupation Listed | 193 |
| 5 | ovens | minnie | F | 14 | Anglican | Irish | Ontario | No Occupation Listed | 193 |
| 4 | ovens | rhoda | F | 27 | Methodist | Irish | Ontario | No Occupation Listed | 188 |
| 5 | ovens | sarah | F | 5 | Methodist | Irish | Ontario | No Occupation Listed | 188 |
| 6 | ovens | thomas | M | 63 | Church of Scotland | Irish | Ireland | Farmers, general and nfs | 159 |
| 3 | ovens | thomas | M | 40 | Anglican | Irish | United States | Farmers, general and nfs | 193 |
| 6 | ovens | william | M | 1 | Methodist | Irish | Ontario | No Occupation Listed | 188 |
| 6 | ovens | william | M | 6 | Anglican | Irish | Ontario | No Occupation Listed | 193 |