Residents of Longueuil, Town—Ville — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
|---|
| 4 | obrien | anna | F | 35 | Roman Catholic | Irish | Ireland | No Occupation Listed | 137 |
| 3 | obrien | thomas | M | 27 | Roman Catholic | Irish | Ireland | Day labourers (e.g journalier) | 137 |
| 5 | obrien | walter | M | 5 | Roman Catholic | Irish | Quebec | No Occupation Listed | 137 |
| 16 | oreilly | george | M | 0 | Episcopal | English | Quebec | No Occupation Listed | 13 |
| 11 | oreilly | james | M | 39 | Episcopal | English | England | inspecteur de marine | 13 |
| 14 | oreilly | james | M | 8 | Episcopal | English | Ireland | No Occupation Listed | 13 |
| 12 | oreilly | jane | F | 30 | Presbyterian | Irish | Ireland | No Occupation Listed | 13 |
| 13 | oreilly | john | M | 9 | Episcopal | English | Ireland | No Occupation Listed | 13 |
| 15 | oreilly | william | M | 6 | Episcopal | English | England | No Occupation Listed | 13 |
| 8 | ouellette | marie | F | 31 | Roman Catholic | French | Quebec | No Occupation Listed | 214 |
| 21 | oxley | eva | F | 6 | Episcopal | English | Quebec | No Occupation Listed | 198 |
| 19 | oxley | frederic | M | 34 | Episcopal | English | England | Salespeople, wholesale or retail trade | 198 |
| 20 | oxley | lisbith | F | 28 | Episcopal | English | Ontario | No Occupation Listed | 198 |
| 22 | oxley | mable | F | 4 | Episcopal | English | Quebec | No Occupation Listed | 198 |
| 24 | oxley | maldrit | F | 0 | Episcopal | English | Quebec | No Occupation Listed | 198 |
| 23 | oxley | marguerite | F | 2 | Episcopal | English | Quebec | No Occupation Listed | 198 |