Residents of Côte St. Louis, Town—Ville — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 15 | obrien | ann | F | 36 | Roman Catholic | Irish | Ireland | No Occupation Listed | 344 |
| 16 | oconnor | ellen | F | 70 | Roman Catholic | Irish | Ireland | No Occupation Listed | 229 |
| 15 | oconnor | thomas | M | 70 | Roman Catholic | Irish | Ireland | Farm workers (dairy) | 229 |
| 13 | ouimet | alberic | M | 14 | Roman Catholic | French Canadian | Quebec | No Occupation Listed | 45 |
| 11 | ouimet | casaire | M | 21 | Roman Catholic | French Canadian | Quebec | Farmers, general and nfs | 45 |
| 14 | ouimet | eliza | F | 22 | Roman Catholic | French Canadian | Quebec | Servants nfs | 45 |
| 16 | ouimet | georgine | F | 10 | Roman Catholic | French Canadian | Quebec | No Occupation Listed | 45 |
| 9 | ouimet | jevere | M | 47 | Roman Catholic | French Canadian | Quebec | Carpenters | 45 |
| 15 | ouimet | marie | F | 12 | Roman Catholic | French Canadian | Quebec | No Occupation Listed | 45 |
| 12 | ouimet | oscar | M | 15 | Roman Catholic | French Canadian | Quebec | Farmers, general and nfs | 45 |