Residents of London E, Village — Sub-district D, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 3 | obrien | john | M | 16 | Roman Catholic | Irish | Quebec | Painters, nfs | 297 |
| 2 | obrien | margaret | F | 50 | Roman Catholic | Irish | Ireland | No Occupation Listed | 297 |
| 5 | obrien | mary | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 297 |
| 1 | obrien | thomas | M | 54 | Roman Catholic | Irish | Ireland | Labourers nfs | 297 |
| 4 | obrien | thomas | M | 14 | Roman Catholic | Irish | Quebec | No Occupation Listed | 297 |
| 6 | obrien | william | M | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 297 |
| 12 | obryen | john | M | 50 | Methodist | Irish | Ontario | Farmers, general and nfs | 208 |
| 13 | obryen | mary | F | 40 | Methodist | English | Ontario | No Occupation Listed | 208 |
| 6 | oeris | emma | F | 24 | Congregationalist | English | Ontario | No Occupation Listed | 162 |
| 11 | ogan | esther | F | 28 | Presbyterian | Irish | Unknown | No Occupation Listed | 182 |
| 10 | ogan | james | M | 30 | Presbyterian | Irish | Ontario | Clerk, nfs | 182 |
| 12 | ogan | jean | F | 3 | Presbyterian | Irish | Ontario | No Occupation Listed | 182 |
| 13 | ogan | mary | F | 0 | Presbyterian | Irish | Ontario | No Occupation Listed | 182 |
| 1 | ohanley | jessie | F | 21 | Roman Catholic | Irish | Ontario | Servants nfs | 135 |
| 8 | okeefe | martha | F | 63 | Anglican | Welsh | Wales | No Occupation Listed | 166 |
| 11 | oldridge | cate | F | 30 | Roman Catholic | Irish | Ireland | No Occupation Listed | 142 |
| 10 | oldridge | catherin | F | 65 | Roman Catholic | Irish | Ireland | No Occupation Listed | 142 |
| 21 | oliver | alice | F | 0 | Anglican | English | Ontario | No Occupation Listed | 169 |
| 20 | oliver | mary | F | 24 | Anglican | Irish | Ontario | No Occupation Listed | 169 |
| 19 | oliver | william | M | 23 | Anglican | English | England | Manufacturers | 169 |
| 16 | oliver | william | M | 23 | Methodist | English | Ontario | Machinists | 288 |
| 14 | omera | elizabeth | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 348 |
| 12 | omera | mary | F | 44 | Roman Catholic | Irish | Ireland | No Occupation Listed | 348 |
| 11 | omera | richard | M | 64 | Roman Catholic | Irish | Ireland | Labourers nfs | 348 |
| 13 | omera | richard | M | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 348 |
| 9 | oneil | charlotte | F | 14 | Congregationalist | Irish | Ontario | No Occupation Listed | 162 |
| 8 | oneil | edward | M | 15 | Congregationalist | Irish | Ontario | No Occupation Listed | 162 |
| 5 | oneil | emma | F | 50 | Congregationalist | English | England | No Occupation Listed | 162 |
| 7 | oneil | frederick | M | 19 | Congregationalist | Irish | Ontario | Metal moulders and coremakers and workers in… | 162 |
| 4 | oneil | hugh | M | 44 | Congregationalist | Irish | Ireland | Painters, nfs | 162 |
| 11 | orme | elizabeth | F | 48 | Methodist | English | United States | No Occupation Listed | 278 |
| 10 | orme | william | M | 48 | Methodist | Irish | Ontario | Insurance Salesmen and agent | 278 |
| 16 | oswayas | alice | F | 54 | Roman Catholic | Irish | Ireland | No Occupation Listed | 84 |
| 14 | oswayas | anteney | M | 50 | Roman Catholic | Irish | Ireland | No Occupation Listed | 84 |
| 15 | oswayas | mary | F | 52 | Roman Catholic | Irish | Ireland | No Occupation Listed | 84 |
| 16 | otoole | charles | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 181 |
| 14 | otoole | john | M | 18 | Roman Catholic | Irish | Ontario | Machinists | 181 |
| 13 | otoole | minnie | F | 22 | Roman Catholic | Irish | Ontario | Tailors and tailoresses | 181 |
| 10 | otoole | owen | M | 64 | Roman Catholic | Irish | Ireland | Carpenters | 181 |
| 11 | otoole | susan | F | 52 | Roman Catholic | Irish | Ireland | No Occupation Listed | 181 |
| 15 | otoole | timothy | M | 16 | Roman Catholic | Irish | Ontario | Painters, nfs | 181 |
| 12 | otoole | william | M | 24 | Roman Catholic | Irish | Ontario | Cigar makers | 181 |
| 19 | outram | hattie | F | 27 | Anglican | English | Ontario | No Occupation Listed | 372 |
| 1 | oxley | george | M | 53 | Methodist | English | England | Upholsterers except vehicle | 385 |
| 2 | oxley | jane | F | 45 | Methodist | Irish | Ontario | No Occupation Listed | 385 |