Residents of Trafalgar — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 11 | o | cyreneeshouse | M | 35 | Disciple of Christ | German | Ontario | river drivers | 81 |
| 22 | oakley | helen | F | 72 | Baptist | Scottish | Ontario | No Occupation Listed | 181 |
| 12 | oboyl | edward | M | 21 | Roman Catholic | Irish | Ontario | No Occupation Listed | 208 |
| 10 | oboyl | honora | F | 54 | Roman Catholic | Irish | Ireland | No Occupation Listed | 208 |
| 13 | oboyl | honora | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 208 |
| 9 | oboyl | james | M | 53 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 208 |
| 11 | oboyl | mary | F | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 208 |
| 21 | ockerman | alberta | F | 22 | Methodist | German | Ontario | No Occupation Listed | 45 |
| 23 | ockerman | alfred | M | 17 | Episcopal Methodist | German | Ontario | law student | 45 |
| 18 | ockerman | catherine | F | 61 | Methodist | German | Ontario | No Occupation Listed | 45 |
| 20 | ockerman | edwin | M | 24 | Methodist | German | Ontario | Farmers, general and nfs | 45 |
| 17 | ockerman | elisha | M | 70 | Methodist | German | Ontario | Farmers, general and nfs | 45 |
| 14 | ockerman | fred | M | 9 | | Irish | Ontario | No Occupation Listed | 361 |
| 15 | ockerman | harvey | M | 8 | | Irish | Ontario | No Occupation Listed | 361 |
| 22 | ockerman | ida | F | 20 | Methodist | German | Ontario | No Occupation Listed | 45 |
| 19 | ockerman | phoebe | F | 38 | Methodist | German | Ontario | No Occupation Listed | 45 |
| 24 | ockerman | phoebe | F | 88 | Quaker/Society of Friends | English | United States | No Occupation Listed | 45 |
| 13 | ockerman | sarah | F | 28 | Methodist | Irish | Ontario | No Occupation Listed | 361 |
| 12 | ockerman | william | M | 36 | Methodist | German | Ontario | Farmers, general and nfs | 361 |
| 20 | oconnor | charles | M | 50 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 270 |
| 25 | oconnor | george | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 270 |
| 5 | oconnor | james | M | 3 | | Irish | Ontario | No Occupation Listed | 71 |
| 6 | oconnor | john | M | 1 | | Irish | Ontario | No Occupation Listed | 71 |
| 1 | oconnor | john | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 270 |
| 24 | oconnor | joseph | M | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 270 |
| 21 | oconnor | mary | F | 28 | Roman Catholic | Irish | Ontario | No Occupation Listed | 270 |
| 23 | oconnor | mary | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 270 |
| 4 | oconnor | nellie | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 71 |
| 22 | oconnor | sarah | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 270 |
| 3 | oconnor | william | M | 30 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 71 |
| 9 | ogara | catherine | F | 35 | Roman Catholic | Irish | Ontario | No Occupation Listed | 162 |
| 11 | ogara | edward | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 162 |
| 10 | ogara | elizabeth | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 162 |
| 12 | ogara | mary | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 162 |
| 8 | ogara | patrick | M | 44 | Roman Catholic | Irish | Ireland | Railway builders, workers and labourers | 162 |
| 8 | ohara | annie | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 287 |
| 25 | ohara | isabella | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 281 |
| 5 | ohara | isabella | F | 28 | Roman Catholic | Irish | Ontario | No Occupation Listed | 282 |
| 4 | ohara | lucinda | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 282 |
| 1 | ohara | mary | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 281 |
| 3 | ohara | mary | F | 72 | Roman Catholic | Irish | Ireland | No Occupation Listed | 282 |
| 22 | ohara | michael | M | 29 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 91 |
| 24 | ohara | william | M | 28 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 281 |
| 15 | oleeorn | william | M | 20 | Anglican | English | England | Labourers nfs | 244 |
| 2 | oliphant | addam | M | 22 | Episcopal Methodist | German | Ontario | Farmers, general and nfs | 510 |
| 3 | oliphant | annie | F | 32 | Episcopal Methodist | German | Ontario | No Occupation Listed | 510 |
| 1 | oliphant | george | M | 25 | Episcopal Methodist | German | Ontario | Farmers, general and nfs | 510 |
| 22 | oneill | bridget | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 69 |
| 25 | oneill | catharine | F | 2 | | Irish | Ontario | No Occupation Listed | 69 |
| 21 | oneill | frances | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 69 |
| 20 | oneill | herery | M | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 69 |
| 23 | oneill | john | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 69 |
| 16 | oneill | larance | M | 60 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 69 |
| 17 | oneill | margret | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 69 |
| 18 | oneill | mary | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 69 |
| 24 | oneill | rose | F | 5 | | Irish | Ontario | No Occupation Listed | 69 |
| 19 | oneill | thomas | M | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 69 |
| 6 | ontrid | anna | F | 22 | Methodist | English | Ontario | No Occupation Listed | 511 |
| 8 | ontrid | effa | F | 14 | | English | Ontario | No Occupation Listed | 511 |
| 5 | ontrid | sarah | F | 50 | Methodist | English | Ontario | No Occupation Listed | 511 |
| 7 | ontrid | sarah | F | 18 | Methodist | English | Ontario | No Occupation Listed | 511 |
| 4 | ontrid | stephen | M | 59 | Methodist | English | Ontario | Blacksmiths | 511 |
| 24 | orr | agnes | F | 25 | Methodist | Scottish | Ontario | No Occupation Listed | 92 |
| 18 | orr | alexander | M | 24 | Episcopal Methodist | Irish | Ontario | Farmers, general and nfs | 40 |
| 12 | orr | andrew | M | 7 | Anglican | Irish | Ontario | No Occupation Listed | 218 |
| 10 | orr | ann | F | 12 | Anglican | Irish | Ontario | No Occupation Listed | 218 |
| 20 | orr | catherine | F | 7 | Methodist | Irish | Ontario | No Occupation Listed | 290 |
| 25 | orr | isabella | F | 72 | Methodist | Irish | Ireland | No Occupation Listed | 92 |
| 14 | orr | john | M | 2 | Anglican | Irish | Ontario | No Occupation Listed | 218 |
| 21 | orr | joseph | M | 4 | Methodist | Irish | Ontario | No Occupation Listed | 290 |
| 15 | orr | lasina | F | 0 | Anglican | Irish | Ontario | No Occupation Listed | 218 |
| 22 | orr | margaret | F | 70 | Methodist | Irish | Ireland | No Occupation Listed | 291 |
| 19 | orr | mary | F | 25 | Presbyterian | Scottish | Ontario | No Occupation Listed | 40 |
| 13 | orr | robert | M | 4 | Anglican | Irish | Ontario | No Occupation Listed | 218 |
| 23 | orr | roland | M | 32 | Methodist | Irish | Ontario | Farmers, general and nfs | 92 |
| 7 | orr | samuel | M | 48 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 218 |
| 11 | orr | samuel | M | 9 | Anglican | Irish | Ontario | No Occupation Listed | 218 |
| 8 | orr | sarah | F | 35 | Anglican | Irish | Ireland | No Occupation Listed | 218 |
| 19 | orr | sarah | F | 35 | Methodist | Scottish | Ontario | No Occupation Listed | 290 |
| 9 | orr | william | M | 14 | Anglican | Irish | Ontario | No Occupation Listed | 218 |
| 18 | orr | wm | M | 38 | Methodist | Irish | Ontario | Farmers, general and nfs | 290 |
| 17 | orsborn | alma | F | 5 | Anglican | English | Ontario | No Occupation Listed | 514 |
| 16 | orsborn | charles | M | 14 | Anglican | English | United States | No Occupation Listed | 514 |
| 15 | orsborn | charlott | F | 33 | Anglican | English | England | No Occupation Listed | 514 |
| 18 | orsborn | james | M | 3 | Anglican | English | Ontario | No Occupation Listed | 514 |
| 14 | orsborn | john | M | 51 | Anglican | English | England | Labourers nfs | 514 |
| 6 | orth | john | M | 40 | Methodist | German | Ontario | Farmers, general and nfs | 483 |
| 10 | orth | lillie | F | 0 | | German | Ontario | No Occupation Listed | 483 |
| 8 | orth | maggie | F | 7 | | German | Ontario | No Occupation Listed | 483 |
| 7 | orth | maryann | F | 32 | Methodist | German | Ontario | No Occupation Listed | 483 |
| 9 | orth | william | M | 3 | | German | Ontario | No Occupation Listed | 483 |
| 4 | osborn | amy | F | 6 | | English | Ontario | No Occupation Listed | 165 |
| 6 | osborn | arvilla | F | 3 | | English | Ontario | No Occupation Listed | 165 |
| 7 | osborn | herbert | M | 1 | | English | Ontario | No Occupation Listed | 165 |
| 2 | osborn | robert | M | 27 | Baptist | English | Ontario | Seamen | 165 |
| 3 | osborn | sarah | F | 25 | Baptist | Irish | Ontario | No Occupation Listed | 165 |
| 5 | osborn | william | M | 4 | | English | Ontario | No Occupation Listed | 165 |
| 2 | outred | livey | F | 19 | Methodist | English | Ontario | Teachers (unspecified) | 221 |