Residents of Amherstburg, T-V — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 15 | obrien | jane | F | 11 | Roman Catholic | Irish | United States | No Occupation Listed | 416 |
| 16 | obrien | john | M | 9 | Roman Catholic | Irish | United States | No Occupation Listed | 416 |
| 13 | obrien | margaret | F | 19 | Roman Catholic | Irish | Ireland | No Occupation Listed | 416 |
| 12 | obrien | mary | F | 37 | Roman Catholic | Irish | Ireland | No Occupation Listed | 416 |
| 14 | obrien | mary | F | 14 | Roman Catholic | Irish | United States | No Occupation Listed | 416 |
| 11 | obrien | p | M | 41 | Roman Catholic | Irish | Ireland | Railway or Railroad Engineers and Enginemen | 416 |
| 24 | oliver | william | M | 56 | Christadelphian | English | England | Tailors and tailoresses | 23 |
| 10 | omadden | eliza | F | 48 | Roman Catholic | Irish | Ireland | Teachers (music) | 99 |
| 3 | omalley | m | F | 26 | Episcopal | Irish | United States | No Occupation Listed | 200 |
| 4 | omalley | may | F | 8 | Episcopal | Irish | United States | No Occupation Listed | 200 |
| 14 | oneal | annie | F | 23 | Roman Catholic | Irish | Ireland | No Occupation Listed | 458 |
| 13 | oneal | george | M | 28 | Roman Catholic | Irish | Ireland | Well-driller, borer or related worker, nfs | 458 |
| 15 | oneal | james | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 458 |
| 21 | orourke | catherine | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 23 | orourke | charles | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 15 | orourke | chas | M | 42 | Roman Catholic | Irish | West Indies | Carpenters | 390 |
| 19 | orourke | edward | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 16 | orourke | ellen | F | 38 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 22 | orourke | ellen | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 18 | orourke | george | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 20 | orourke | john | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 24 | orourke | mark | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 390 |
| 17 | orourke | thomas | M | 18 | Roman Catholic | Irish | Ontario | Carpenters | 390 |
| 15 | osborne | arthur | M | 21 | Anglican | English | England | Farmers, general and nfs | 401 |
| 16 | osborne | sarah | F | 18 | Anglican | English | England | No Occupation Listed | 401 |
| 17 | ouellette | d | M | 27 | Roman Catholic | French | Ontario | Clerk, nfs | 120 |
| 1 | ouellette | joseph | M | 25 | Roman Catholic | French | Quebec | Bakers | 45 |