Residents of Hamilton, Ward—Quartier No. 7 — Sub-district G, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 2 | _oale | charlotte | F | 63 | Wesleyan Methodist | English | England | No Occupation Listed | 303 |
| 1 | _oale | william | M | 64 | Wesleyan Methodist | English | England | Printers nfs | 303 |
| 12 | obrien | anne | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 235 |
| 8 | obrien | bridget | F | 48 | Roman Catholic | Irish | Ireland | No Occupation Listed | 235 |
| 11 | obrien | edward | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 235 |
| 13 | obrien | henry | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 235 |
| 4 | obrien | james | M | 41 | Roman Catholic | Irish | Ireland | Metal moulders and coremakers and workers in… | 110 |
| 6 | obrien | james | M | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 110 |
| 7 | obrien | john | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 110 |
| 10 | obrien | joseph | M | 22 | Roman Catholic | Irish | Ontario | Railroad, railway clerks | 235 |
| 9 | obrien | josephine | F | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 235 |
| 8 | obrien | mathew | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 110 |
| 14 | obrien | maude | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 235 |
| 5 | obrien | rosana | F | 40 | Roman Catholic | Irish | Ontario | No Occupation Listed | 110 |
| 9 | obrien | rose | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 110 |
| 7 | obrien | william | M | 51 | Roman Catholic | Irish | Ireland | Metal moulders and coremakers and workers in… | 235 |
| 6 | ogrado | john | M | 40 | Roman Catholic | Irish | Ireland | Ambiguous responses | 272 |
| 8 | ogrado | m | M | 13 | Roman Catholic | Scottish | Scotland | No Occupation Listed | 272 |
| 7 | ogrado | mary | F | 32 | Presbyterian | Scottish | Scotland | No Occupation Listed | 272 |
| 9 | ogrado | rachel | F | 11 | Roman Catholic | Scottish | Scotland | No Occupation Listed | 272 |
| 10 | ogrado | | M | 3 | Roman Catholic | Scottish | Scotland | No Occupation Listed | 272 |
| 24 | ogrady | clementine | F | 2 | Roman Catholic | Irish | Ireland | No Occupation Listed | 348 |
| 24 | ogrady | edward | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 288 |
| 22 | ogrady | ellen | F | 29 | Roman Catholic | Irish | Ireland | No Occupation Listed | 288 |
| 21 | ogrady | james | M | 30 | Roman Catholic | Irish | Ontario | Metal moulders and coremakers and workers in… | 288 |
| 25 | ogrady | james | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 288 |
| 19 | ogrady | martin | M | 42 | Roman Catholic | Irish | Ireland | Ambiguous responses | 348 |
| 21 | ogrady | martin | M | 15 | Roman Catholic | Irish | Ireland | Ambiguous responses | 348 |
| 20 | ogrady | mary | F | 42 | Roman Catholic | Irish | Ireland | No Occupation Listed | 348 |
| 23 | ogrady | mary | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 288 |
| 22 | ogrady | sarah | F | 12 | Roman Catholic | Irish | Ireland | No Occupation Listed | 348 |
| 23 | ogrady | v | F | 6 | Roman Catholic | Irish | Ireland | No Occupation Listed | 348 |
| 2 | oliver | emma | F | 21 | Methodist | English | Ontario | Milliners | 147 |
| 9 | oneil | catherine | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 345 |
| 10 | oneil | gertrude | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 345 |
| 8 | oneil | john | M | 25 | Roman Catholic | Irish | United States | Other garment makers | 345 |
| 12 | orphens | james | M | 22 | Methodist | Canadian | Ontario | Boot and shoemakers and repairers | 67 |
| 4 | orr | eliza | F | 14 | Presbyterian | Scottish | Scotland | No Occupation Listed | 323 |
| 3 | orr | ellen | F | 24 | Presbyterian | Scottish | Scotland | No Occupation Listed | 323 |
| 7 | orr | henry | M | 0 | Presbyterian | Scottish | Ontario | No Occupation Listed | 323 |
| 2 | orr | james | M | 34 | Presbyterian | Scottish | Scotland | Fibre preparers | 323 |
| 5 | orr | jane | F | 6 | Presbyterian | Scottish | Ontario | No Occupation Listed | 323 |
| 6 | orr | mary | F | 3 | Presbyterian | Scottish | Ontario | No Occupation Listed | 323 |
| 5 | orton | fransis | F | 39 | Anglican | English | England | No Occupation Listed | 19 |
| 4 | orton | henry | M | 46 | Anglican | English | England | Machinists | 19 |
| 6 | oust | wm | M | 9 | Congregationalist | Scottish | Ontario | No Occupation Listed | 33 |
| 23 | overholt | charles | M | 12 | Methodist | German | Ontario | No Occupation Listed | 87 |
| 2 | overholt | edward | M | 5 | Methodist | German | Ontario | No Occupation Listed | 87 |
| 25 | overholt | elizabeth | F | 9 | Methodist | German | Ontario | No Occupation Listed | 87 |
| 21 | overholt | jane | F | 37 | Methodist | Irish | Ireland | No Occupation Listed | 87 |
| 22 | overholt | jerome | M | 23 | Methodist | German | Ontario | Tailors and tailoresses | 87 |
| 1 | overholt | lilly | F | 6 | Methodist | German | Ontario | No Occupation Listed | 87 |
| 24 | overholt | margaret | F | 9 | Methodist | German | Ontario | No Occupation Listed | 87 |
| 20 | overholt | moses | M | 48 | Methodist | German | Ontario | Tailors and tailoresses | 87 |
| 20 | owens | anne | F | 19 | Church of Scotland | Irish | Ireland | Servants nfs | 20 |
| 20 | oxley | elizabeth | F | 50 | Methodist | English | England | No Occupation Listed | 51 |
| 22 | oxley | walter | M | 27 | Methodist | English | England | Labourers nfs | 51 |
| 21 | oxley | william | M | 30 | Methodist | English | England | Gardeners nfs | 51 |