Residents of Kingston, Ontario, Ward—Quartier — Sub-district E, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 15 | obrien | daniel | M | 69 | Roman Catholic | Irish | Ireland | Waiters | 190 |
| 24 | obrien | father | M | 25 | Roman Catholic | Irish | Ontario | Ministers of Religion | 133 |
| 14 | obrien | mary | F | 19 | Roman Catholic | Irish | Ireland | No Occupation Listed | 189 |
| 9 | oconnell | james | M | 43 | Roman Catholic | Irish | Ireland | Boot and shoemakers and repairers | 230 |
| 10 | oconnell | mary | F | 43 | Roman Catholic | Irish | Ireland | No Occupation Listed | 230 |
| 16 | odonell | catherine | F | 60 | Roman Catholic | Irish | Ireland | Servants nfs | 191 |
| 9 | odonnell | mary | F | 54 | Roman Catholic | Irish | Ireland | No Occupation Listed | 58 |
| 8 | odonnell | william | M | 53 | Roman Catholic | Irish | Ireland | Labourers nfs | 58 |
| 17 | offord | elizabeth | F | 15 | Methodist | English | Ontario | No Occupation Listed | 255 |
| 16 | offord | emma | F | 19 | Methodist | English | Ontario | No Occupation Listed | 255 |
| 18 | offord | fredrick | M | 10 | Methodist | English | Ontario | No Occupation Listed | 255 |
| 13 | offord | george | M | 57 | Methodist | English | England | Manufacturers | 255 |
| 14 | offord | george | M | 23 | Methodist | English | Ontario | Clerk, nfs | 255 |
| 15 | offord | james | M | 21 | Methodist | English | Ontario | No Occupation Listed | 255 |
| 19 | offord | victoria | F | 8 | Methodist | English | Ontario | No Occupation Listed | 255 |
| 15 | ohara | brother | M | 33 | Roman Catholic | Irish | Ontario | Members of religious orders | 131 |
| 12 | ohare | sister | F | 35 | Roman Catholic | Irish | Quebec | No Occupation Listed | 141 |
| 8 | olliver | gertrude | F | 2 | Anglican | Scottish | Ontario | No Occupation Listed | 29 |
| 6 | olliver | mary | F | 30 | Anglican | English | Ontario | No Occupation Listed | 29 |
| 7 | olliver | may | F | 3 | Anglican | Scottish | Ontario | No Occupation Listed | 29 |
| 6 | oloughlin | anna | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 14 |
| 5 | oloughlin | catherin | F | 70 | Roman Catholic | Irish | Ireland | Dealer, merchant etc. (Wholesale & retail trade) | 14 |
| 24 | omara | henry | M | 39 | Roman Catholic | Irish | Ontario | Seamen | 64 |
| 25 | omara | mary | F | 38 | Roman Catholic | Irish | Ireland | No Occupation Listed | 64 |
| 7 | omara | william | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 14 |
| 20 | oneill | briget | F | 40 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 18 | oriley | richard | M | 27 | Anglican | Irish | Ontario | Clerk, nfs | 114 |
| 20 | orr | catherine | F | 24 | Presbyterian | Irish | Ontario | No Occupation Listed | 150 |
| 19 | orr | jane | F | 30 | Presbyterian | Irish | Ontario | No Occupation Listed | 150 |
| 17 | orr | john | M | 28 | Presbyterian | Irish | Ontario | Clerk, nfs | 150 |
| 16 | orr | matilda | F | 60 | Presbyterian | Irish | Ireland | No Occupation Listed | 150 |
| 18 | orr | matilda | F | 34 | Presbyterian | Irish | Ontario | No Occupation Listed | 150 |
| 2 | oshaughnessy | bridget | F | 60 | Roman Catholic | Irish | Ireland | No Occupation Listed | 160 |
| 1 | oshaughnessy | michael | M | 70 | Roman Catholic | Irish | Ireland | No Occupation Listed | 160 |
| 5 | oshea | elizabeth | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 34 |
| 4 | oshea | john | M | 46 | Roman Catholic | Irish | Ireland | Ambiguous responses | 34 |
| 10 | owens | mary | F | 75 | Roman Catholic | Irish | Ontario | No Occupation Listed | 213 |