Residents of Ops — Sub-district A, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 13 | ingram | elizabeth | F | 20 | Methodist | Irish | Ontario | No Occupation Listed | 143 |
| 12 | ingram | maria | F | 40 | Anglican | Irish | Ireland | No Occupation Listed | 143 |
| 11 | ingram | robert | M | 64 | Anglican | Irish | Ireland | Farmers, general and nfs | 143 |
| 14 | ingram | robert | M | 18 | Methodist | Irish | Ontario | Farmers, general and nfs | 143 |
| 15 | ingram | thomas | M | 16 | Methodist | Irish | Ontario | Farmers, general and nfs | 143 |
| 16 | ingram | william | M | 13 | Methodist | Irish | Ontario | No Occupation Listed | 143 |
| 11 | irven | margret | F | 60 | Anglican | Irish | Ireland | No Occupation Listed | 235 |
| 9 | irwin | elizabeth | F | 25 | Presbyterian | Irish | Ontario | No Occupation Listed | 97 |
| 17 | irwin | emily | F | 13 | Anglican | Irish | Ontario | No Occupation Listed | 151 |
| 11 | irwin | ester | F | 23 | Presbyterian | Irish | Ontario | No Occupation Listed | 97 |
| 15 | irwin | george | M | 22 | Anglican | Irish | Ontario | Farmers, general and nfs | 151 |
| 13 | irwin | henry | M | 55 | Anglican | Irish | Ireland | Farmers, general and nfs | 151 |
| 16 | irwin | james | M | 19 | Anglican | Irish | Ontario | Farmers, general and nfs | 151 |
| 8 | irwin | john | M | 67 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 97 |
| 12 | irwin | john | M | 21 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 97 |
| 11 | irwin | john | M | 26 | Anglican | English | Ontario | Farmers, general and nfs | 179 |
| 10 | irwin | martha | F | 23 | Presbyterian | Irish | Ontario | No Occupation Listed | 97 |
| 12 | irwin | mary | F | 25 | Anglican | English | Ontario | No Occupation Listed | 179 |
| 13 | irwin | minney | F | 14 | Presbyterian | Irish | Ontario | No Occupation Listed | 97 |
| 14 | irwin | silina | F | 55 | Anglican | Irish | England | No Occupation Listed | 151 |