Residents of Holland — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 16 | ohara | joseph | M | 34 | Anglican | Irish | Ireland | Boot and shoemakers and repairers | 173 |
| 18 | ohara | joseph | M | 2 | Anglican | Irish | Ontario | No Occupation Listed | 173 |
| 17 | ohara | mary | F | 28 | Anglican | Irish | Ontario | No Occupation Listed | 173 |
| 19 | ohara | mary | F | 1 | Anglican | Irish | Ontario | No Occupation Listed | 173 |
| 22 | olmstead | eliza | F | 37 | Methodist | English | Ontario | No Occupation Listed | 382 |
| 23 | olmstead | francis | M | 14 | Methodist | English | Ontario | No Occupation Listed | 382 |
| 21 | olmstead | richard | M | 41 | Methodist | English | Ontario | Sawyer, and other titled wood or sawmill operatives | 382 |
| 24 | olmstead | richard | M | 8 | Methodist | English | Ontario | No Occupation Listed | 382 |
| 6 | omara | daniel | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 101 |
| 2 | omara | elizabeth | F | 55 | Roman Catholic | Irish | Ireland | No Occupation Listed | 101 |
| 4 | omara | ellen | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 101 |
| 3 | omara | james | M | 29 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 101 |
| 5 | omara | john | M | 18 | Roman Catholic | Irish | Ontario | Ambiguous responses | 101 |
| 1 | omara | micheal | M | 61 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 101 |
| 7 | orr | george | M | 60 | Anglican | Irish | Ireland | Servants nfs | 50 |
| 14 | owning | john | M | 27 | Methodist | English | Ontario | Farmers, general and nfs | 336 |
| 15 | owning | martha | F | 22 | Methodist | Scottish | Ontario | No Occupation Listed | 336 |