Residents of Kingston, Victoria, Ward—Quartier — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 20 | obrien | agnes | F | 25 | Roman Catholic | Irish | Ontario | Servants nfs | 49 |
| 21 | obrien | annie | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 17 | obrien | catherine | F | 41 | Roman Catholic | Irish | Ireland | No Occupation Listed | 115 |
| 22 | obrien | e | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 19 | obrien | fanny | F | 41 | Roman Catholic | Irish | Ireland | No Occupation Listed | 305 |
| 18 | obrien | helen | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 24 | obrien | helen | F | 71 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 25 | obrien | jane | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 18 | obrien | john | M | 43 | Roman Catholic | Irish | Ireland | Labourers nfs | 305 |
| 16 | obrien | lawrance | M | 50 | Roman Catholic | Irish | Ireland | Engineers (US) nfs | 115 |
| 20 | obrien | margaret | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 19 | obrien | mary | F | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 23 | obrien | mathew | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 115 |
| 21 | obrien | patrick | M | 1 | Roman Catholic | Irish | Ireland | No Occupation Listed | 305 |
| 20 | obrien | thos | M | 8 | Roman Catholic | Irish | Ireland | No Occupation Listed | 305 |
| 3 | oddonell | ageline | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 24 | oddonell | agnes | F | 35 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 2 | oddonell | arthur | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 5 | oddonell | carry | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 1 | oddonell | ed | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 4 | oddonell | emma | F | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 6 | oddonell | henreatta | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 21 | oddonell | margaret | F | 72 | Roman Catholic | Irish | Ireland | No Occupation Listed | 45 |
| 23 | oddonell | patrick | M | 41 | Roman Catholic | Irish | Ontario | Dealer, merchant etc. (Wholesale & retail trade) | 4 |
| 25 | oddonell | william | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 17 | odonell | eddy | M | 8 | Roman Catholic | Irish | Ireland | No Occupation Listed | 304 |
| 15 | odonell | ellen | F | 61 | Roman Catholic | Irish | Ireland | No Occupation Listed | 304 |
| 16 | odonell | ellen | F | 25 | Roman Catholic | Irish | Ireland | No Occupation Listed | 304 |
| 20 | odonnell | bryan | M | 55 | Roman Catholic | Irish | Ireland | Gardeners nfs | 340 |
| 21 | odonnell | mary | F | 50 | Roman Catholic | Irish | Ireland | No Occupation Listed | 340 |
| 21 | ohern | ann | F | 57 | Roman Catholic | Irish | Ireland | No Occupation Listed | 286 |
| 20 | ohern | oshane | M | 60 | Roman Catholic | Irish | Ireland | No Occupation Listed | 286 |
| 13 | oliver | fanny | F | 13 | Anglican | English | Ontario | No Occupation Listed | 239 |
| 10 | oliver | fred | M | 42 | Anglican | English | England | Proprietors and executive officials, railways | 239 |
| 15 | oliver | harriet | F | 3 | Anglican | English | Ontario | No Occupation Listed | 239 |
| 11 | oliver | jane | F | 38 | Anglican | English | England | No Occupation Listed | 239 |
| 12 | oliver | maude | F | 15 | Anglican | English | Ontario | No Occupation Listed | 239 |
| 14 | oliver | susan | F | 10 | Anglican | English | Ontario | No Occupation Listed | 239 |
| 25 | oniel | christina | F | 16 | Roman Catholic | Irish | Quebec | No Occupation Listed | 234 |
| 22 | orielly | ann | F | 75 | Roman Catholic | Irish | Ireland | No Occupation Listed | 50 |
| 7 | orielly | annie | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 6 | orielly | emily | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 8 | orielly | eveline | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 5 | orielly | gertrude | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 9 | orielly | lorretta | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 2 | orielly | margaret | F | 41 | Roman Catholic | Irish | Ireland | No Occupation Listed | 122 |
| 3 | orielly | sarah | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 4 | orielly | theresa | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 1 | orielly | thomas | M | 43 | Roman Catholic | Irish | Ontario | Engineers (US) nfs | 122 |
| 16 | otoole | catherine | F | 32 | Roman Catholic | Irish | Ontario | No Occupation Listed | 13 |
| 17 | otoole | charles | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 13 |
| 15 | otoole | john | M | 35 | Roman Catholic | Irish | Ireland | Metal moulders and coremakers and workers in… | 13 |
| 18 | otoole | kevine | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 13 |
| 20 | otoole | mary | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 13 |
| 19 | otoole | micheal | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 13 |
| 13 | otto | charles | M | 15 | Baptist | Irish | Ontario | No Occupation Listed | 242 |
| 8 | otto | joshua | M | 53 | Baptist | Irish | Ireland | Paper and paperboard products makers except boxes | 242 |
| 12 | otto | lilly | F | 18 | Baptist | Irish | Ontario | No Occupation Listed | 242 |
| 11 | otto | maria | F | 22 | Baptist | Irish | Ontario | No Occupation Listed | 242 |
| 10 | otto | percy | M | 29 | Baptist | Irish | Ontario | No Occupation Listed | 242 |
| 9 | otto | sarah | F | 45 | Baptist | Irish | Ontario | No Occupation Listed | 242 |
| 2 | ovens | rufus | M | 22 | Reformed Presbyterian | English | Ontario | No Occupation Listed | 7 |
| 24 | owielly | elizabeth | F | 40 | Roman Catholic | Irish | Ontario | No Occupation Listed | 50 |