Residents of Renfrew, T-V — Sub-district L, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 15 | obrien | david | M | 32 | Roman Catholic | Irish | Ontario | Medical Doctors and physicians (not UK) | 118 |
| 17 | obrien | john | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 19 | obrien | mary | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 16 | obrien | terressa | F | 30 | Roman Catholic | Irish | Quebec | No Occupation Listed | 118 |
| 18 | obrien | william | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 16 | oconnor | annie | F | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 268 |
| 2 | oconnor | john | M | 22 | Roman Catholic | Irish | Ontario | Teachers (unspecified) | 208 |
| 15 | oconnor | margaret | F | 35 | Roman Catholic | Irish | Ontario | No Occupation Listed | 268 |
| 14 | oconnor | patrick | M | 43 | Roman Catholic | Irish | Ireland | Labourers nfs | 268 |
| 24 | odonnell | jane | F | 24 | Presbyterian | Irish | Ontario | No Occupation Listed | 44 |
| 25 | odonnell | john | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 44 |
| 1 | odonnell | katy | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 44 |
| 23 | odonnell | william | M | 23 | Roman Catholic | Irish | Ontario | Labourers nfs | 44 |
| 1 | ogorman | bridget | F | 22 | Roman Catholic | Irish | Ontario | Telegraph operators | 228 |
| 5 | ogorman | hanora | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 228 |
| 3 | ogorman | john | M | 19 | Roman Catholic | Irish | Ontario | Labourers nfs | 228 |
| 7 | ogorman | margaret | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 228 |
| 25 | ogorman | maria | F | 42 | Roman Catholic | Irish | Ireland | No Occupation Listed | 228 |
| 2 | ogorman | mary | F | 21 | Roman Catholic | Irish | Ontario | Telegraph operators | 228 |
| 8 | ogorman | michael | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 228 |
| 24 | ogorman | simon | M | 52 | Roman Catholic | Irish | Ireland | Coopers etc. | 228 |
| 6 | ogorman | simon | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 228 |
| 4 | ogorman | thomas | M | 17 | Roman Catholic | Irish | Ontario | Clerks in shops and stores | 228 |
| 13 | oharro | allice | F | 12 | Methodist | Irish | Ontario | No Occupation Listed | 110 |
| 12 | oharro | annie | F | 14 | Methodist | Irish | Ontario | No Occupation Listed | 110 |
| 14 | oharro | arthur | M | 11 | Methodist | Irish | Ontario | No Occupation Listed | 110 |
| 9 | oharro | henry | M | 22 | Methodist | Irish | Ontario | Blacksmiths | 110 |
| 11 | oharro | mary | F | 17 | Methodist | Irish | Ontario | No Occupation Listed | 110 |
| 7 | oharro | maryanne | F | 44 | Methodist | Irish | Ontario | No Occupation Listed | 110 |
| 10 | oharro | robert | M | 21 | Methodist | Irish | Ontario | Coach, carriage, cart and wagon makers | 110 |
| 15 | oharro | thomas | M | 9 | Methodist | Irish | Ontario | No Occupation Listed | 110 |
| 6 | oharro | william | M | 48 | Methodist | Irish | Ontario | Coach, carriage, cart and wagon makers | 110 |
| 8 | oharro | william | M | 23 | Methodist | Irish | Ontario | Teachers (unspecified) | 110 |
| 23 | oneil | alexander | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 185 |
| 24 | oneil | catherine | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 185 |
| 21 | oneil | mark | M | 29 | Roman Catholic | Irish | Ontario | Bookkeepers nfs | 185 |
| 22 | oneil | maryanne | F | 22 | Roman Catholic | Scottish | Ontario | No Occupation Listed | 185 |
| 25 | ourig | lorra | F | 38 | Roman Catholic | French | Quebec | No Occupation Listed | 197 |