Residents of Clifton, Town—Ville — Sub-district L, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 17 | oakely | william | M | 36 | Anglican | English | England | Stone carvers or cutters and stone yard workers | 343 |
| 21 | obrine | william | M | 54 | Presbyterian | Scottish | Scotland | No Occupation Listed | 106 |
| 3 | oharra | maggie | F | 16 | Roman Catholic | Irish | Ireland | Servants nfs | 410 |
| 7 | oldfield | alice | F | 7 | Presbyterian | English | Ontario | No Occupation Listed | 276 |
| 8 | oldfield | annie | F | 5 | Presbyterian | English | Ontario | No Occupation Listed | 276 |
| 5 | oldfield | horris | M | 28 | Presbyterian | English | Ontario | Labourers nfs | 276 |
| 6 | oldfield | margaret | F | 28 | Presbyterian | English | Ontario | No Occupation Listed | 276 |
| 9 | oldfield | mary | F | 2 | Presbyterian | English | Ontario | No Occupation Listed | 276 |
| 8 | oleary | agness | F | 51 | Methodist | Irish | Ireland | No Occupation Listed | 140 |
| 3 | oleary | annie | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 139 |
| 25 | oleary | bridget | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 139 |
| 23 | oleary | daniel | M | 30 | Roman Catholic | Irish | Ireland | Stationary engineers and engine men | 139 |
| 7 | oleary | daniel | M | 62 | Roman Catholic | Irish | Ireland | Railway freight handlers | 140 |
| 9 | oleary | daniel | M | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 24 | oleary | ellen | F | 29 | Roman Catholic | Irish | Ontario | No Occupation Listed | 139 |
| 5 | oleary | ellen | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 139 |
| 14 | oleary | hannah | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 2 | oleary | james | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 139 |
| 6 | oleary | james | M | 72 | Roman Catholic | Irish | Ireland | No Occupation Listed | 139 |
| 13 | oleary | john | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 4 | oleary | joseph | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 139 |
| 10 | oleary | julia | F | 25 | Methodist | Irish | Ontario | No Occupation Listed | 140 |
| 11 | oleary | mary | F | 18 | Methodist | Irish | Ontario | No Occupation Listed | 140 |
| 1 | oleary | norah | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 139 |
| 12 | oleary | robert | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 15 | oleary | thomas | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 17 | oliver | elizabeth | F | 39 | Anglican | Irish | Quebec | No Occupation Listed | 34 |
| 16 | oliver | james | M | 40 | Anglican | Scottish | Scotland | Medical Doctors and physicians (not UK) | 34 |
| 7 | oneil | james | M | 75 | Roman Catholic | Irish | Ireland | No Occupation Listed | 247 |
| 10 | oneil | james | M | 22 | Roman Catholic | Irish | Ontario | Foremen and supervisors, railways | 247 |
| 8 | oneil | johanah | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 247 |
| 13 | oneil | john | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 247 |
| 11 | oneil | margaret | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 247 |
| 9 | oneil | mary | F | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 247 |
| 12 | oneil | patrick | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 247 |
| 14 | oneil | sarah | F | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 247 |
| 6 | oneill | annie | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 131 |
| 2 | oneill | catharine | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 131 |
| 20 | oneill | daniel | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 380 |
| 5 | oneill | james | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 131 |
| 16 | oneill | james | M | 28 | Roman Catholic | Irish | Ireland | Labourers nfs | 380 |
| 23 | oneill | john | M | 52 | Roman Catholic | Irish | Ireland | Labourers nfs | 131 |
| 3 | oneill | john | M | 21 | Roman Catholic | Irish | Ontario | Labourers nfs | 131 |
| 14 | oneill | john | M | 64 | Roman Catholic | Irish | Ireland | Labourers nfs | 380 |
| 24 | oneill | mary | F | 50 | Roman Catholic | Irish | Ireland | No Occupation Listed | 131 |
| 1 | oneill | mary | F | 25 | Roman Catholic | Irish | Ontario | Tailors and tailoresses | 131 |
| 21 | oneill | mary | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 380 |
| 15 | oneill | matelda | F | 49 | Roman Catholic | Irish | Ontario | No Occupation Listed | 380 |
| 25 | oneill | mathew | M | 27 | Roman Catholic | Irish | Ontario | Engineers (US) nfs | 131 |
| 17 | oneill | michael | M | 27 | Roman Catholic | Irish | Ontario | Labourers nfs | 380 |
| 19 | oneill | patrick | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 380 |
| 7 | oneill | sarah | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 131 |
| 18 | oneill | thomas | M | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 380 |
| 5 | orooke | ann | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 169 |
| 7 | orooke | annie | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 169 |
| 6 | orooke | james | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 169 |
| 4 | orooke | john | M | 50 | Roman Catholic | Irish | Ireland | Others in machinery | 169 |
| 8 | orooke | patrick | M | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 169 |
| 2 | orourke | edward | M | 32 | Roman Catholic | Irish | Ireland | Stone carvers or cutters and stone yard workers | 92 |
| 6 | orourke | edward | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 92 |
| 3 | orourke | marg | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 92 |
| 4 | orourke | mary | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 92 |
| 5 | orourke | thomas | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 92 |