Residents of Walpole — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 18 | oberlin | charles | M | 24 | Methodist | German | Ontario | Blacksmiths | 3 |
| 3 | odonell | anna | F | 31 | Roman Catholic | Irish | Ontario | No Occupation Listed | 156 |
| 4 | odonell | bernard | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 156 |
| 8 | odonell | gertrude | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 156 |
| 2 | odonell | james | M | 37 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 156 |
| 7 | odonell | james | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 156 |
| 9 | odonell | matilda | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 156 |
| 6 | odonell | sarah | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 156 |
| 5 | odonell | teresa | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 156 |
| 15 | ohara | catherine | F | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 28 |
| 5 | ohara | charles | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 119 |
| 3 | ohara | elizabeth | F | 40 | Roman Catholic | Scottish | Ontario | No Occupation Listed | 119 |
| 2 | ohara | james | M | 45 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 119 |
| 9 | ohara | john | M | 40 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 120 |
| 4 | ohara | kate | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 119 |
| 14 | ohara | peter | M | 26 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 28 |
| 11 | oliver | a | M | 30 | Presbyterian | Scottish | Ontario | Commercial travellers | 252 |
| 4 | oneil | catherine | F | 60 | Roman Catholic | Irish | Ireland | No Occupation Listed | 289 |
| 5 | oneil | edward | M | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 289 |
| 3 | oneil | patrick | M | 59 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 289 |
| 24 | onenloenny | eliza | F | 60 | Methodist | English | Ontario | No Occupation Listed | 246 |
| 11 | ooakes | robert | M | 70 | Primitive Methodist | English | England | Farmers, general and nfs | 113 |
| 13 | ororke | thomas | M | 42 | Roman Catholic | Irish | Ireland | river drivers | 186 |
| 10 | osborne | isaac | M | 25 | Methodist | German | Ontario | river drivers | 93 |