Residents of Trois-Rivières, Notre-Dame, Ward—Quartier — Sub-district D, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 19 | oisard | anna | F | 7 | Roman Catholic | French | Quebec | No Occupation Listed | 75 |
| 21 | oisard | edouard | M | 2 | Roman Catholic | French | Quebec | No Occupation Listed | 75 |
| 22 | oisard | joseph | M | 80 | Roman Catholic | French | Quebec | Legislative officials and heads of government | 75 |
| 20 | oisard | josephine | F | 4 | Roman Catholic | French | Quebec | No Occupation Listed | 75 |
| 18 | oisard | marie | F | 13 | Roman Catholic | French | Quebec | No Occupation Listed | 75 |
| 17 | oisard | oscar | M | 14 | Roman Catholic | French | Quebec | No Occupation Listed | 75 |
| 15 | oisard | ovila | M | 48 | Roman Catholic | French | Quebec | Butchers | 75 |
| 13 | onezime | prenoveau | M | 25 | Roman Catholic | French | Quebec | Other production and related workers nec | 74 |
| 17 | ormogaste | brigitt | F | 53 | Roman Catholic | Irish | Quebec | No Occupation Listed | 345 |
| 6 | ouelleur | alexandre | M | 24 | Roman Catholic | French | Quebec | Other production and related workers nec | 153 |