Residents of Blenheim, Town—Ville — Sub-district E, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 19 | irwin | andrew | M | 1 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 4 | irwin | andrew | M | 51 | Reformed Baptist | Irish | Ireland | Coopers etc. | 165 |
| 12 | irwin | david | M | 41 | Reformed Baptist | Irish | Ontario | Labourers nfs | 165 |
| 14 | irwin | david | M | 17 | Anglican | Irish | Ontario | Farmers, general and nfs | 248 |
| 5 | irwin | eliza | F | 40 | Reformed Baptist | Irish | Ontario | No Occupation Listed | 165 |
| 10 | irwin | eliza | F | 6 | Reformed Baptist | Irish | Ontario | No Occupation Listed | 165 |
| 16 | irwin | francess | F | 10 | Anglican | Irish | Ontario | No Occupation Listed | 248 |
| 1 | irwin | george | M | 24 | Anglican | Irish | Ontario | Labourers nfs | 98 |
| 15 | irwin | harriett | F | 13 | Anglican | Irish | Ontario | No Occupation Listed | 248 |
| 17 | irwin | henrietta | F | 8 | Anglican | Irish | Ontario | No Occupation Listed | 248 |
| 10 | irwin | little | M | 64 | Anglican | Irish | Ireland | Farmers, general and nfs | 248 |
| 2 | irwin | mary | F | 20 | Anglican | French | Ontario | No Occupation Listed | 98 |
| 18 | irwin | mary | F | 31 | Presbyterian | Irish | Ontario | No Occupation Listed | 145 |
| 11 | irwin | mary | F | 54 | Anglican | Irish | Ontario | No Occupation Listed | 248 |
| 12 | irwin | mary | F | 28 | Anglican | Irish | Ontario | No Occupation Listed | 248 |
| 17 | irwin | thos | M | 32 | Presbyterian | Irish | Nova Scotia | Cooks | 145 |
| 13 | irwin | william | M | 25 | Anglican | Irish | Ontario | Carpenters | 248 |