Residents of Greenock — Sub-district G, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 17 | oahring | apolona | F | 3 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 11 | oahring | barbara | F | 20 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 12 | oahring | cathrine | F | 16 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 10 | oahring | henery | M | 22 | Roman Catholic | German | Ontario | Farmers, general and nfs | 68 |
| 18 | oahring | john | M | 2 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 16 | oahring | joseph | M | 6 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 7 | oahring | mary | F | 41 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 14 | oahring | mary | F | 10 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 13 | oahring | odilla | F | 11 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 6 | oahring | philip | M | 56 | Roman Catholic | German | Germany | Farmers, general and nfs | 68 |
| 9 | oahring | philip | M | 24 | Roman Catholic | German | Ontario | Farmers, general and nfs | 68 |
| 15 | oahring | theresa | F | 7 | Roman Catholic | German | Ontario | No Occupation Listed | 68 |
| 8 | oahring | william | M | 27 | Roman Catholic | German | Ontario | Farmers, general and nfs | 68 |
| 13 | obrine | aney | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 127 |
| 12 | obrine | bridget | F | 85 | Roman Catholic | Irish | Ireland | No Occupation Listed | 127 |
| 11 | obrine | patrick | M | 36 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 127 |
| 6 | odonold | anne | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 78 |
| 4 | odonold | charles | M | 29 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 78 |
| 5 | odonold | john | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 78 |
| 2 | oldheiser | annie | F | 29 | Roman Catholic | German | Ontario | No Occupation Listed | 15 |
| 1 | oldheiser | john | M | 33 | Roman Catholic | German | Germany | Farmers, general and nfs | 15 |
| 4 | oldheiser | john | M | 5 | Roman Catholic | German | Ontario | No Occupation Listed | 15 |
| 3 | oldheiser | joseph | M | 6 | Roman Catholic | German | Ontario | No Occupation Listed | 15 |
| 5 | oldheiser | mary | F | 4 | Roman Catholic | German | Ontario | No Occupation Listed | 15 |
| 6 | oldheiser | simon | M | 0 | Roman Catholic | German | Ontario | No Occupation Listed | 15 |
| 2 | osborn | albert | M | 60 | Anglican | English | England | Labourers nfs | 12 |
| 4 | osborn | charles | M | 14 | Anglican | English | Ontario | No Occupation Listed | 12 |
| 3 | osborn | mary | F | 57 | Anglican | English | England | No Occupation Listed | 12 |
| 9 | osborne | albert | M | 23 | Baptist | English | Ontario | Farmers, general and nfs | 227 |
| 10 | osborne | albert | M | 13 | Baptist | English | Ontario | No Occupation Listed | 377 |
| 13 | osborne | ellen | F | 5 | Baptist | English | Ontario | No Occupation Listed | 377 |
| 14 | osborne | emmie | F | 2 | Baptist | English | Ontario | No Occupation Listed | 377 |
| 11 | osborne | jarvis | M | 20 | Baptist | English | Ontario | Farmers, general and nfs | 227 |
| 10 | osborne | malicia | F | 19 | Baptist | English | Ontario | No Occupation Listed | 227 |
| 11 | osborne | mary | F | 11 | Baptist | English | Ontario | No Occupation Listed | 377 |
| 9 | osborne | minnie | F | 32 | Baptist | Canadian | Nova Scotia | No Occupation Listed | 377 |
| 8 | osborne | robert | M | 34 | Baptist | English | Ontario | Farmers, general and nfs | 377 |
| 12 | osborne | sarah | F | 9 | Baptist | English | Ontario | No Occupation Listed | 377 |