Residents of Tilsonburgh — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 18 | odell | henry | M | 23 | Methodist | Blank | Ontario | Labourers nfs | 71 |
| 10 | okieff | ellen | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 127 |
| 12 | okieff | ellen | F | 83 | Roman Catholic | Irish | Ireland | No Occupation Listed | 127 |
| 11 | okieff | jerome | M | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 127 |
| 9 | okieff | richard | M | 56 | Roman Catholic | Irish | Ireland | Labourers nfs | 127 |
| 8 | oniel | kathleen | F | 31 | Baptist | Irish | Ireland | Tailors and tailoresses | 121 |
| 9 | orr | lulu | F | 12 | Methodist | Irish | Ontario | No Occupation Listed | 10 |
| 16 | ostronder | bessie | F | 4 | Anglican | Blank | Ontario | No Occupation Listed | 105 |
| 11 | ostronder | james | M | 39 | Anglican | Blank | Ontario | Hirers out | 105 |
| 14 | ostronder | lillie | F | 11 | Anglican | Blank | Ontario | No Occupation Listed | 105 |
| 15 | ostronder | maud | F | 6 | Anglican | Blank | Ontario | No Occupation Listed | 105 |
| 12 | ostronder | sarah | F | 25 | Anglican | English | England | No Occupation Listed | 105 |
| 17 | ostronder | winford | M | 3 | Anglican | Blank | Ontario | No Occupation Listed | 105 |
| 13 | ostronder | wm | M | 13 | Anglican | Blank | Ontario | No Occupation Listed | 105 |