Residents of Montague — Sub-district J, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 1 | irwin | annie | F | 17 | Presbyterian | Irish | Ontario | No Occupation Listed | 67 |
| 25 | irwin | james | M | 19 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 67 |
| 22 | irwin | john | M | 56 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 67 |
| 23 | irwin | mary | F | 54 | Presbyterian | Irish | Ontario | No Occupation Listed | 67 |
| 24 | irwin | saarah | F | 20 | Presbyterian | Irish | Ontario | No Occupation Listed | 67 |
| 3 | irwin | susanna | F | 11 | Presbyterian | Irish | Ontario | No Occupation Listed | 67 |
| 2 | irwin | thomas | M | 13 | Presbyterian | Irish | Ontario | No Occupation Listed | 67 |