Residents of Aylmer, Village — Sub-district AA, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 3 | oben | esther | F | 27 | Roman Catholic | French | Ontario | Washing and laundry services | 24 |
| 5 | oben | joseph | M | 1 | Roman Catholic | French | Quebec | No Occupation Listed | 24 |
| 6 | oben | mary | F | 1 | Roman Catholic | French | Quebec | No Occupation Listed | 24 |
| 4 | oben | oliver | M | 5 | Roman Catholic | French | Quebec | No Occupation Listed | 24 |
| 17 | oconner | mary | F | 40 | Roman Catholic | Irish | Ireland | Servants nfs | 126 |
| 20 | odonell | edword | M | 60 | Roman Catholic | Irish | Ireland | Labourers nfs | 158 |
| 21 | odonell | ellen | F | 50 | Roman Catholic | Irish | Ireland | No Occupation Listed | 158 |
| 2 | odonell | ellen | F | 14 | Roman Catholic | Irish | Quebec | No Occupation Listed | 178 |
| 1 | odonell | james | M | 16 | Roman Catholic | Irish | Quebec | No Occupation Listed | 178 |
| 5 | odonell | john | M | 6 | Roman Catholic | Irish | Quebec | No Occupation Listed | 178 |
| 24 | odonell | juley | F | 38 | Roman Catholic | Irish | Ireland | No Occupation Listed | 178 |
| 25 | odonell | mary | F | 18 | Roman Catholic | Irish | Quebec | No Occupation Listed | 178 |
| 6 | odonell | mary | F | 3 | Roman Catholic | Irish | Quebec | No Occupation Listed | 178 |
| 3 | odonell | theresa | F | 11 | Roman Catholic | Irish | Quebec | No Occupation Listed | 178 |
| 23 | odonell | thomas | M | | Roman Catholic | Irish | England | Boot and shoemakers and repairers | 178 |
| 4 | odonell | thomas | M | 9 | Roman Catholic | Irish | Quebec | No Occupation Listed | 178 |
| 2 | oriley | margret | F | 62 | Roman Catholic | Irish | Quebec | No Occupation Listed | 307 |