Residents of Elma — Sub-district E, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 3 | oliver | annie | F | 9 | Anglican | Irish | Ontario | No Occupation Listed | 114 |
| 24 | oliver | cathrine | F | 35 | Anglican | Irish | Ireland | No Occupation Listed | 114 |
| 25 | oliver | elisabeth | F | 70 | Anglican | Irish | Ireland | No Occupation Listed | 182 |
| 23 | oliver | emma | F | 28 | Presbyterian | Irish | Ireland | No Occupation Listed | 182 |
| 2 | oliver | fanny | F | 12 | Anglican | Irish | Ontario | No Occupation Listed | 114 |
| 10 | oliver | lilian | F | 14 | Methodist | English | Ontario | No Occupation Listed | 115 |
| 23 | oliver | noble | M | 40 | Anglican | Irish | Ireland | Farmers, general and nfs | 114 |
| 5 | oliver | noble | M | 3 | Anglican | Irish | Ontario | No Occupation Listed | 114 |
| 4 | oliver | robert | M | 5 | Anglican | Irish | Ontario | No Occupation Listed | 114 |
| 22 | oliver | robert | M | 42 | Anglican | Irish | Ireland | Farmers, general and nfs | 182 |
| 25 | oliver | sarah | F | 18 | Anglican | Irish | Ontario | No Occupation Listed | 114 |
| 1 | oliver | william | M | 16 | Anglican | Irish | Ontario | No Occupation Listed | 114 |
| 24 | oliver | william | M | 1 | Presbyterian | Irish | Ontario | No Occupation Listed | 182 |
| 11 | oneil | jennie | F | 18 | Presbyterian | Scottish | Ontario | Servants nfs | 69 |
| 25 | orr | huena | F | 24 | Presbyterian | Scottish | Ontario | No Occupation Listed | 181 |
| 24 | orr | james | M | 30 | Presbyterian | German | United States | No Occupation Listed | 181 |