Residents of Humberstone — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 24 | o_term_e | henritta | F | 22 | Lutheran | German | Ontario | No Occupation Listed | 176 |
| 25 | o_term_e | john | M | 18 | Lutheran | German | Ontario | No Occupation Listed | 176 |
| 16 | obrine | james | M | 54 | Reformed Presbyterian | Scottish | Scotland | Metal moulders and coremakers and workers in… | 16 |
| 2 | obrine | john | M | 42 | Episcopal Methodist | Irish | Ireland | Labourers nfs | 41 |
| 20 | obrine | john | M | 18 | Roman Catholic | Irish | Ontario | Labourers nfs | 150 |
| 17 | obrine | mary | F | 48 | Reformed Presbyterian | Scottish | Scotland | No Occupation Listed | 16 |
| 21 | obrine | michael | M | 58 | Roman Catholic | Irish | Ireland | Labourers nfs | 13 |
| 12 | obrine | michael | M | 40 | Roman Catholic | Irish | Ireland | Labourers nfs | 208 |
| 8 | obrine | richard | M | 50 | Roman Catholic | Irish | Ontario | Labourers nfs | 171 |
| 4 | obrine | william | M | 24 | Roman Catholic | Irish | Ireland | Labourers nfs | 53 |
| 21 | obrine | wm | M | 0 | | Blank | — | Labourers nfs | 270 |
| 1 | oconel | james | M | 24 | Roman Catholic | Irish | Ontario | Labourers nfs | 145 |
| 22 | oconners | edwin | M | 46 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 285 |
| 23 | oconners | sarah | F | 40 | Roman Catholic | Irish | Ontario | No Occupation Listed | 285 |
| 13 | odea | william | M | 50 | Roman Catholic | Irish | Ontario | Labourers nfs | 83 |
| 18 | ogg | james | M | 48 | Episcopal Methodist | Scottish | Nova Scotia | Labourers nfs | 128 |
| 1 | ogornead | james | M | 19 | Roman Catholic | Irish | Ireland | Labourers nfs | 181 |
| 5 | ohana | thomas | M | 31 | Episcopal Methodist | English | Ontario | Labourers nfs | 128 |
| 3 | oherrin | james | M | 35 | Roman Catholic | Irish | Ontario | Labourers nfs | 12 |
| 19 | okeffe | doniel | M | 36 | Roman Catholic | French | Quebec | Labourers nfs | 462 |
| 4 | oleary | cathern | F | 26 | Roman Catholic | Irish | Ontario | No Occupation Listed | 178 |
| 5 | oleary | margaret | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 178 |
| 6 | oleary | mary | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 178 |
| 3 | oleary | michael | M | 31 | Roman Catholic | Irish | Ontario | Labourers nfs | 178 |
| 10 | oliver | e | M | 23 | Anglican | English | England | Labourers nfs | 271 |
| 9 | olliffe | john | M | 31 | Anglican | English | England | Labourers nfs | 90 |
| 7 | olmstead | adria | F | 5 | Anglican | English | Ontario | No Occupation Listed | 91 |
| 4 | olmstead | emma | F | 39 | Anglican | German | Ontario | No Occupation Listed | 91 |
| 8 | olmstead | ervin | M | 1 | Anglican | English | Ontario | No Occupation Listed | 91 |
| 6 | olmstead | evaline | F | 8 | Anglican | English | Ontario | No Occupation Listed | 91 |
| 5 | olmstead | frank | M | 10 | Anglican | English | Ontario | No Occupation Listed | 91 |
| 3 | olmstead | horace | M | 51 | Anglican | English | New York | Farmers, general and nfs | 91 |
| 15 | oneal | alice | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 15 | oneal | chester | M | 4 | Episcopal Methodist | English | Ontario | No Occupation Listed | 91 |
| 14 | oneal | clara | F | 6 | Episcopal Methodist | English | Ontario | No Occupation Listed | 91 |
| 10 | oneal | edward | M | 26 | Roman Catholic | Irish | Ireland | Labourers nfs | 357 |
| 10 | oneal | elisibeth | F | 34 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 17 | oneal | ellen | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 24 | oneal | james | M | 40 | Roman Catholic | Irish | Ontario | Labourers nfs | 26 |
| 14 | oneal | jane | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 9 | oneal | jerry | M | 45 | Anglican | English | Ireland | Labourers nfs | 26 |
| 21 | oneal | john | M | 20 | Roman Catholic | Irish | Ontario | Labourers nfs | 26 |
| 1 | oneal | john | M | 40 | Roman Catholic | Irish | Quebec | Labourers nfs | 44 |
| 18 | oneal | john | M | 26 | Roman Catholic | Irish | Ontario | Labourers nfs | 208 |
| 16 | oneal | josephene | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 13 | oneal | margret | F | 28 | Episcopal Methodist | English | Ontario | No Occupation Listed | 91 |
| 11 | oneal | mary | F | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 12 | oneal | petter | M | 34 | Episcopal Methodist | Irish | Ontario | Engineers (US) nfs | 91 |
| 16 | oneal | syrus | M | 23 | Episcopal Methodist | English | Ontario | No Occupation Listed | 91 |
| 9 | oneal | thomas | M | 36 | Roman Catholic | Irish | Ireland | Porters | 469 |
| 12 | oneal | thomas | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 13 | oneal | william | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 25 | orily | paterick | M | 23 | Roman Catholic | Irish | United States | Labourers nfs | 274 |
| 8 | ormer | arther | M | 23 | Anglican | English | England | Labourers nfs | 184 |
| 8 | ort | charley | M | 5 | Lutheran | German | Ontario | No Occupation Listed | 281 |
| 9 | ort | edward | M | 3 | Lutheran | German | Ontario | No Occupation Listed | 281 |
| 10 | ort | ellen | F | 2 | Lutheran | German | Ontario | No Occupation Listed | 281 |
| 11 | ort | manuel | M | 0 | Lutheran | German | Ontario | No Occupation Listed | 281 |
| 6 | ort | mary | F | 29 | Lutheran | German | Ontario | No Occupation Listed | 281 |
| 5 | ort | phillip | M | 32 | Lutheran | German | Ontario | Farmers, general and nfs | 281 |
| 7 | ort | william | M | 7 | Lutheran | German | Ontario | No Occupation Listed | 281 |
| 22 | owens | edwin | M | 50 | Episcopal Methodist | English | Ontario | Labourers nfs | 112 |
| 24 | owens | richard | M | 24 | Episcopal Methodist | English | Ontario | Labourers nfs | 112 |