Residents of Prince Arthur — Sub-district DD, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 10 | oconnell | james | M | 53 | Roman Catholic | Irish | United States | No Occupation Listed | 179 |
| 19 | oconnor | james | M | 23 | Roman Catholic | Irish | Ontario | Dealer, merchant etc. (Wholesale & retail trade) | 165 |
| 20 | oconnor | mary | F | 23 | Anglican | Irish | Ireland | No Occupation Listed | 165 |
| 20 | oheran | nelly | F | 30 | Roman Catholic | Canadian | Ontario | Servants nfs | 174 |
| 16 | oherron | william | M | 27 | Roman Catholic | Irish | Ontario | Porters | 177 |
| 22 | opie | gertrude | F | 22 | Wesleyan Methodist | English | England | No Occupation Listed | 203 |
| 23 | opie | hiline | F | 1 | Wesleyan Methodist | English | Ontario | No Occupation Listed | 203 |
| 21 | opie | thomas | M | 23 | Wesleyan Methodist | English | England | Miners | 203 |
| 24 | opie | thomas | F | 0 | Wesleyan Methodist | English | Ontario | No Occupation Listed | 203 |
| 19 | ottowell | phillip | M | 32 | Methodist | English | Ontario | No Occupation Listed | 129 |
| 16 | ottowell | tammy | F | 21 | Methodist | English | Ontario | No Occupation Listed | 129 |
| 18 | ottowell | william | M | 2 | Methodist | English | Ontario | No Occupation Listed | 129 |
| 24 | owen | camelia | F | 16 | Anglican | English | Ontario | No Occupation Listed | 269 |
| 22 | owen | catrine | F | 20 | Anglican | English | England | No Occupation Listed | 269 |
| 21 | owen | charles | M | 24 | Anglican | English | England | Farmers, general and nfs | 269 |
| 19 | owen | druss | M | 48 | Anglican | English | England | Farmers, general and nfs | 269 |
| 1 | owen | george | M | 12 | Anglican | English | England | No Occupation Listed | 269 |
| 23 | owen | joseph | M | 18 | Anglican | English | Ontario | No Occupation Listed | 269 |
| 20 | owen | mary | F | 44 | Anglican | English | England | No Occupation Listed | 269 |
| 25 | owen | teressa | F | 14 | Anglican | English | Ontario | No Occupation Listed | 269 |