Residents of Gwillimbury N — Sub-district H, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 4 | obrien | james | M | 19 | Methodist | Irish | Ontario | No Occupation Listed | 104 |
| 10 | ough | amy | F | 4 | Methodist | English | Ontario | No Occupation Listed | 58 |
| 7 | ough | annie | F | 13 | Methodist | English | Ontario | No Occupation Listed | 58 |
| 4 | ough | elisa | F | 38 | Methodist | English | Ontario | No Occupation Listed | 58 |
| 9 | ough | flora | F | 6 | Methodist | English | Ontario | No Occupation Listed | 58 |
| 5 | ough | maria | F | 16 | Methodist | English | Ontario | No Occupation Listed | 58 |
| 6 | ough | marritt | M | 10 | Methodist | English | Ontario | No Occupation Listed | 58 |
| 8 | ough | richard | M | 8 | Methodist | English | Ontario | No Occupation Listed | 58 |
| 3 | ough | thomas | M | 43 | Methodist | English | England | Farmers, general and nfs | 58 |