Residents of Loughborough — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 11 | obrien | anstasia | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 10 | obrien | bridget | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 5 | obrien | catherine | F | 26 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 23 | obrien | edmond | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 183 |
| 13 | obrien | elen | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 4 | obrien | james | M | 64 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 469 |
| 7 | obrien | james | M | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 9 | obrien | martin | M | 19 | Roman Catholic | Irish | Ontario | Teachers (unspecified) | 469 |
| 7 | obrien | mary | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 166 |
| 8 | obrien | mary | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 6 | obrien | patrick | M | 50 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 166 |
| 12 | obrien | patrick | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 6 | obrien | rose | F | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 469 |
| 22 | obrien | william | M | 18 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 183 |
| 13 | oconer | catherine | F | 27 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 191 |
| 15 | oconer | lena | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 191 |
| 14 | oconer | may | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 191 |
| 12 | oconer | thomas | M | 32 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 191 |
| 15 | oconner | alice | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 43 |
| 16 | oconner | charles | M | 21 | Roman Catholic | Irish | Ontario | No Occupation Listed | 43 |
| 13 | oconner | elizabeth | F | 21 | Roman Catholic | Irish | Ontario | No Occupation Listed | 43 |
| 11 | oconner | john | M | 65 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 43 |
| 12 | oconner | margrett | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 43 |
| 14 | oconner | mary | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 43 |
| 18 | oconor | annie | F | 27 | Roman Catholic | Irish | Ontario | No Occupation Listed | 371 |
| 19 | oconor | eliza | F | 0 | | Blank | Ontario | No Occupation Listed | 371 |
| 17 | oconor | james | M | 32 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 371 |
| 16 | odonell | bridget | F | 53 | Roman Catholic | Irish | Ireland | No Occupation Listed | 48 |
| 18 | odonell | francisco | M | 15 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 48 |
| 17 | odonell | james | M | 30 | Roman Catholic | Irish | Ireland | No Occupation Listed | 48 |
| 19 | odonell | mary | F | 10 | Roman Catholic | Irish | Ireland | No Occupation Listed | 48 |
| 15 | odonell | micheal | M | 60 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 48 |
| 16 | odonnell | david | M | 22 | Roman Catholic | Irish | Ontario | Blacksmiths | 176 |
| 7 | oriley | anna | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 431 |
| 15 | oriley | bridget | F | 40 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 168 |
| 6 | oriley | catherine | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 431 |
| 16 | oriley | edword | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 168 |
| 4 | oriley | elen | F | 27 | Roman Catholic | Irish | Ontario | No Occupation Listed | 431 |
| 14 | oriley | james | M | 43 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 168 |
| 17 | oriley | james | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 168 |
| 5 | oriley | john | M | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 431 |
| 1 | oriley | luke | M | 57 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 431 |
| 2 | oriley | mary | F | 55 | Roman Catholic | Irish | Ireland | No Occupation Listed | 431 |
| 18 | oriley | rose | F | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 168 |
| 3 | oriley | thomas | M | 32 | Roman Catholic | Irish | Ontario | No Occupation Listed | 431 |
| 23 | orser | ambroze | M | 19 | Episcopal Methodist | German | Ontario | Servants nfs | 412 |
| 5 | orser | dolphes | M | 5 | Primitive Methodist | German | Ontario | No Occupation Listed | 412 |
| 1 | orser | florence | F | 13 | Episcopal Methodist | German | Ontario | No Occupation Listed | 412 |
| 3 | orser | george | M | 9 | Episcopal Methodist | German | Ontario | No Occupation Listed | 412 |
| 4 | orser | herbet | M | 7 | Episcopal Methodist | German | Ontario | No Occupation Listed | 412 |
| 25 | orser | jason | M | 15 | Episcopal Methodist | German | Ontario | No Occupation Listed | 412 |
| 2 | orser | oliver | M | 11 | Episcopal Methodist | German | Ontario | No Occupation Listed | 412 |
| 24 | orser | robert | M | 17 | Episcopal Methodist | German | Ontario | Servants nfs | 412 |
| 22 | orser | sarah | F | 45 | Episcopal Methodist | German | Ontario | No Occupation Listed | 412 |