Residents of Tossorontio — Sub-district E, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 25 | irvin | agness | F | 21 | Presbyterian | Scottish | Ontario | No Occupation Listed | 150 |
| 3 | irvin | alice | F | 2 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 14 | irvin | amanda | F | 0 | Methodist | Irish | Ontario | No Occupation Listed | 233 |
| 1 | irvin | elizabeth | F | 3 | Presbyterian | Irish | Ontario | No Occupation Listed | 150 |
| 13 | irvin | elizabeth | F | 2 | Methodist | Irish | Ontario | No Occupation Listed | 233 |
| 21 | irvin | frances | F | 38 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 1 | irvin | frances | F | 8 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 4 | irvin | ida | F | 0 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 11 | irvin | jane | F | 25 | Methodist | Irish | Ontario | No Occupation Listed | 233 |
| 10 | irvin | john | M | 27 | Methodist | Irish | Ontario | Labourers nfs | 233 |
| 23 | irvin | margaret | F | 17 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 12 | irvin | mary | F | 3 | Methodist | Irish | Ontario | No Occupation Listed | 233 |
| 20 | irvin | michael | M | 43 | Anglican | Irish | Ontario | Farmers, general and nfs | 270 |
| 2 | irvin | richard | M | 6 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 24 | irvin | sarah | F | 15 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 22 | irvin | thomas | M | 19 | Anglican | Irish | Ontario | No Occupation Listed | 270 |
| 24 | irvin | william | M | 28 | Anglican | Irish | Ontario | Labourers nfs | 150 |
| 2 | irvin | william | M | 1 | Presbyterian | Irish | Ontario | No Occupation Listed | 150 |
| 25 | irvin | william | M | 10 | Anglican | Irish | Ontario | No Occupation Listed | 270 |