Residents of Ascot — Sub-district F, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 7 | oconnor | george | M | 28 | Roman Catholic | Irish | Quebec | Farmers, general and nfs | 23 |
| 6 | oconnor | james | M | 46 | Roman Catholic | Irish | Quebec | Farmers, general and nfs | 23 |
| 5 | oconnor | john | M | 48 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 23 |
| 4 | oconnor | margret | F | 74 | Roman Catholic | Irish | Ireland | No Occupation Listed | 23 |
| 3 | oconnor | thomas | M | 77 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 23 |
| 16 | odear | mary | F | 14 | Roman Catholic | French | France | Servants nfs | 58 |
| 11 | oudett | agnis | F | 1 | Roman Catholic | French | Quebec | No Occupation Listed | 47 |
| 13 | oudett | edward | M | 35 | Roman Catholic | French | Quebec | Farmers, general and nfs | 47 |
| 5 | oudett | elie | M | 30 | Roman Catholic | French | Quebec | Farmers, general and nfs | 47 |
| 9 | oudett | georgie | F | 4 | Roman Catholic | French | Quebec | No Occupation Listed | 47 |
| 7 | oudett | hattie | F | 9 | Roman Catholic | French | Quebec | No Occupation Listed | 47 |
| 8 | oudett | james | M | 7 | Roman Catholic | French | Quebec | No Occupation Listed | 47 |
| 6 | oudett | rosalind | F | 26 | Roman Catholic | French | Quebec | No Occupation Listed | 47 |
| 10 | oudett | rosilla | F | 2 | Roman Catholic | French | Quebec | No Occupation Listed | 47 |
| 3 | oughtred | alien | M | 28 | Wesleyan Methodist | English | Ontario | law student | 1 |
| 2 | oughtred | bessie | F | 14 | Congregationalist | English | Quebec | No Occupation Listed | 1 |
| 1 | oughtred | dorothy | F | 59 | Congregationalist | English | Quebec | No Occupation Listed | 1 |
| 25 | owens | james | M | 48 | Wesleyan Methodist | Irish | Quebec | Farmers, general and nfs | 111 |
| 1 | owens | sarah | F | 47 | Roman Catholic | Irish | Quebec | No Occupation Listed | 111 |