Residents of Blenheim — Sub-district G, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 3 | odair | eliza | F | 63 | Presbyterian | Irish | Ireland | Servants nfs | 235 |
| 2 | odair | james | M | 20 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 235 |
| 6 | odair | mary | F | 28 | Presbyterian | Irish | Ireland | Servants nfs | 235 |
| 7 | odair | matilda | F | 25 | Presbyterian | Irish | Ireland | Servants nfs | 235 |
| 4 | odair | robert | M | 10 | Presbyterian | Irish | Ireland | No Occupation Listed | 235 |
| 16 | oleon | adam | M | 57 | Presbyterian | English | Scotland | Farmers, general and nfs | 114 |
| 18 | oleon | isabellah | F | 21 | Presbyterian | English | Ontario | Servants nfs | 114 |
| 17 | oleon | jane | F | 54 | Presbyterian | English | Scotland | No Occupation Listed | 114 |
| 21 | oleon | jennet | F | 13 | Presbyterian | English | Ontario | No Occupation Listed | 114 |
| 19 | oleon | john | M | 19 | Presbyterian | English | Ontario | Farmers, general and nfs | 114 |
| 22 | oleon | walter | M | 10 | Presbyterian | English | Ontario | No Occupation Listed | 114 |
| 20 | oleon | william | M | 16 | Presbyterian | English | Ontario | No Occupation Listed | 114 |
| 4 | oliver | agnes | F | 33 | Presbyterian | Scottish | Ontario | No Occupation Listed | 135 |
| 4 | oliver | catherine | F | 28 | Presbyterian | Scottish | Ontario | No Occupation Listed | 1 |
| 6 | oliver | christina | F | 1 | Presbyterian | Scottish | Ontario | No Occupation Listed | 135 |
| 6 | oliver | david | M | 24 | Presbyterian | Irish | Ontario | Printers nfs | 319 |
| 5 | oliver | ellen | F | 44 | Presbyterian | Scottish | Ontario | No Occupation Listed | 261 |
| 5 | oliver | george | M | 3 | Presbyterian | Scottish | Ontario | No Occupation Listed | 135 |
| 8 | oliver | george | M | 18 | Presbyterian | Irish | Ontario | Labourers nfs | 319 |
| 9 | oliver | hugh | M | 15 | Presbyterian | Irish | Ontario | Labourers nfs | 319 |
| 4 | oliver | isabella | F | 50 | Presbyterian | Irish | Ireland | No Occupation Listed | 319 |
| 5 | oliver | james | M | 26 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 1 |
| 3 | oliver | james | M | 60 | Presbyterian | Irish | Ireland | Labourers nfs | 319 |
| 5 | oliver | james | M | 26 | Presbyterian | Irish | Ontario | lawyer | 319 |
| 3 | oliver | jane | F | 30 | Presbyterian | Scottish | Ontario | Dressmakers | 1 |
| 7 | oliver | janet | F | 73 | Presbyterian | Scottish | Scotland | No Occupation Listed | 135 |
| 1 | oliver | john | M | 54 | Presbyterian | Scottish | Scotland | Farmers, general and nfs | 1 |
| 7 | oliver | john | M | 17 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 1 |
| 6 | oliver | maggie | F | 20 | Presbyterian | Scottish | Ontario | No Occupation Listed | 1 |
| 2 | oliver | margret | F | 53 | Presbyterian | Scottish | Scotland | No Occupation Listed | 1 |
| 8 | oliver | margret | F | 40 | Presbyterian | Scottish | Scotland | No Occupation Listed | 135 |
| 7 | oliver | mary | F | 22 | Presbyterian | Irish | Ontario | No Occupation Listed | 319 |
| 3 | oliver | robert | M | 43 | Presbyterian | Scottish | Scotland | Farmers, general and nfs | 135 |
| 10 | oliver | samuel | M | 13 | Presbyterian | Irish | Ontario | No Occupation Listed | 319 |
| 8 | oliver | william | M | 14 | Presbyterian | Scottish | Ontario | No Occupation Listed | 1 |
| 4 | oliver | william | M | 44 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 261 |
| 11 | oliver | william | M | 11 | Presbyterian | Irish | Ontario | No Occupation Listed | 319 |
| 5 | ommon | ann | F | 57 | Other Brethren, n.e.c. | Irish | Ireland | Servants nfs | 203 |
| 6 | ommon | anne | F | 23 | Other Brethren, n.e.c. | Irish | Ontario | Weavers | 203 |
| 20 | oneil | arthur | M | 10 | Methodist | Irish | Ontario | No Occupation Listed | 267 |
| 17 | oneil | edwin | M | 18 | Methodist | Irish | Ontario | Farmers, general and nfs | 267 |
| 21 | oneil | ellen | F | 5 | Methodist | Irish | Ontario | No Occupation Listed | 267 |
| 15 | oneil | james | M | 43 | Methodist | Irish | Ireland | Farmers, general and nfs | 267 |
| 19 | oneil | jane | F | 14 | Methodist | Irish | Ontario | No Occupation Listed | 267 |
| 16 | oneil | sevilla | F | 40 | Methodist | Scottish | Ontario | No Occupation Listed | 267 |
| 18 | oneil | william | M | 16 | Methodist | Irish | Ontario | Farmers, general and nfs | 267 |
| 9 | orr | eliza | F | 44 | Methodist | English | Ontario | No Occupation Listed | 419 |
| 8 | orr | robert | M | 44 | Methodist | Irish | Ireland | Labourers nfs | 419 |
| 10 | orr | william | M | 6 | Methodist | English | Ontario | No Occupation Listed | 419 |
| 25 | ort | catharine | F | 72 | Methodist | German | Germany | No Occupation Listed | 332 |
| 19 | ort | jacob | M | 37 | Methodist | German | Ontario | Farmers, general and nfs | 332 |
| 22 | ort | john | M | 8 | Methodist | German | Ontario | No Occupation Listed | 332 |
| 1 | ort | john | M | 46 | Methodist | German | Ontario | river drivers | 332 |
| 24 | ort | lavina | F | 1 | Methodist | German | Ontario | No Occupation Listed | 332 |
| 20 | ort | mary | F | 35 | Methodist | German | Germany | No Occupation Listed | 332 |
| 21 | ort | mary | F | 9 | Methodist | German | Ontario | No Occupation Listed | 332 |
| 23 | ort | sarah | F | 6 | Methodist | German | Ontario | No Occupation Listed | 332 |