Residents of Sarnia — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 6 | oldham | adilad | F | 34 | Anglican | English | Ontario | No Occupation Listed | 320 |
| 8 | oldham | minnie | F | 12 | Anglican | English | Ontario | No Occupation Listed | 320 |
| 7 | oldham | walter | M | 17 | Anglican | English | Ontario | No Occupation Listed | 320 |
| 5 | oldham | william | M | 47 | Anglican | English | England | Porters | 320 |
| 9 | oldham | william | M | 9 | Anglican | English | Ontario | No Occupation Listed | 320 |
| 11 | oliver | charlott | F | 11 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 402 |
| 12 | oliver | david | M | 9 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 402 |
| 15 | oliver | eliza | F | 0 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 402 |
| 14 | oliver | emelia | F | 4 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 402 |
| 10 | oliver | george | M | 13 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 402 |
| 8 | oliver | henry | M | 46 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | Farmers, general and nfs | 402 |
| 13 | oliver | joseph | M | 7 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 402 |
| 9 | oliver | mariah | F | 34 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 402 |
| 13 | omare | anne | F | 45 | Roman Catholic | Irish | Ireland | No Occupation Listed | 142 |
| 11 | omare | charles | M | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 142 |
| 9 | omare | denis | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 142 |
| 10 | omare | james | M | 24 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 142 |
| 12 | omare | philip | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 142 |
| 11 | otter | daniel | M | 30 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | Farmers, general and nfs | 407 |
| 15 | otter | eliza | F | 35 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 407 |
| 16 | otter | john | M | 1 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 407 |
| 12 | otter | nancy | F | 28 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 407 |
| 14 | otter | thomas | M | 8 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 407 |
| 13 | otter | wesley | M | 11 | Wesleyan Methodist | Aboriginal peoples, n.s | Ontario | No Occupation Listed | 407 |