Residents of Nanaïmo, Noonas Bay — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 1 | obrien | charles | M | 27 | Roman Catholic | Irish | Australia | Miners | 452 |
| 25 | obrien | james | M | 27 | Roman Catholic | Irish | United States | Teamsters (inc. mine driver, etc.) | 141 |
| 1 | obrien | louisa | F | 19 | Wesleyan Methodist | English | British Columbia | No Occupation Listed | 141 |
| 18 | oconnell | margaret | F | 20 | Roman Catholic | Irish | England | No Occupation Listed | 413 |
| 19 | oconnell | patrick | M | 3 | Roman Catholic | Irish | United States | No Occupation Listed | 413 |
| 21 | oconnell | patrick | M | 70 | Roman Catholic | Irish | Ireland | No Occupation Listed | 413 |
| 17 | oconnell | thomas | M | 28 | Roman Catholic | Irish | United States | Miners | 413 |
| 20 | oconnell | thomas | M | 0 | Roman Catholic | Irish | United States | No Occupation Listed | 413 |
| 24 | oday | mary | F | 65 | Roman Catholic | Irish | Ireland | No Occupation Listed | 387 |
| 23 | oday | michael | M | 50 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 387 |
| 4 | ofthecross | sister | F | 37 | Roman Catholic | French | Ontario | Members of religious orders | 181 |
| 16 | old | albert | M | 1 | Wesleyan Methodist | English | British Columbia | No Occupation Listed | 127 |
| 12 | old | george | M | 42 | Wesleyan Methodist | English | England | Miners | 127 |
| 15 | old | john | M | 5 | Wesleyan Methodist | English | British Columbia | No Occupation Listed | 127 |
| 13 | old | nanny | F | 34 | Wesleyan Methodist | English | England | No Occupation Listed | 127 |
| 14 | old | william | M | 18 | Wesleyan Methodist | English | England | Miners | 127 |
| 8 | on_how | | M | 22 | | Chinese | China | Labourers nfs | 556 |
| 6 | on_yow | | M | 28 | | Chinese | China | Labourers nfs | 575 |
| 2 | on_yun | | M | 20 | | Chinese | China | Cooks | 229 |
| 16 | orwin | william | M | 62 | Anglican | English | England | Farmers, general and nfs | 386 |
| 15 | osullivan | catherine | F | 7 | Roman Catholic | Irish | United States | No Occupation Listed | 158 |
| 14 | osullivan | marth | F | 49 | Roman Catholic | Irish | Ireland | No Occupation Listed | 158 |
| 13 | osullivan | timothy | M | 48 | Roman Catholic | Irish | Ireland | Machinists | 158 |
| 5 | overton | david | M | 56 | Methodist | African Origins | United States | Farmers, general and nfs | 354 |