Residents of Innisfil — Sub-district H, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 21 | irvine | effie | F | 2 | Methodist | Scottish | Ontario | No Occupation Listed | 141 |
| 19 | irvine | george | M | 27 | Methodist | Scottish | Ontario | Mason nfs or combined | 141 |
| 20 | irvine | kate | F | 22 | Methodist | Irish | Ontario | No Occupation Listed | 141 |
| 22 | irvine | walter | M | 0 | Methodist | Scottish | Ontario | No Occupation Listed | 141 |
| 1 | irving | bella | F | 22 | Presbyterian | Scottish | Scotland | No Occupation Listed | 183 |
| 6 | irving | david | M | 48 | Presbyterian | Scottish | Scotland | Farmers, general and nfs | 37 |
| 10 | irving | elisabeth | F | 11 | Presbyterian | Scottish | Ontario | No Occupation Listed | 37 |
| 7 | irving | grace | F | 52 | Presbyterian | Scottish | Scotland | No Occupation Listed | 37 |
| 23 | irving | james | M | 62 | Presbyterian | Scottish | Scotland | Farmers, general and nfs | 183 |
| 24 | irving | jane | F | 59 | Presbyterian | Scottish | Scotland | No Occupation Listed | 183 |
| 22 | irving | johanathan | M | 76 | Presbyterian | English | Ontario | No Occupation Listed | 7 |
| 9 | irving | john | M | 19 | Presbyterian | Scottish | Ontario | Teachers (unspecified) | 37 |
| 25 | irving | john | M | 31 | Presbyterian | Scottish | Scotland | No Occupation Listed | 183 |
| 2 | irving | thomas | M | 20 | Presbyterian | Scottish | Ontario | No Occupation Listed | 183 |
| 8 | irving | william | M | 22 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 37 |
| 25 | irwin | bertha | F | 4 | Presbyterian | Irish | Ontario | No Occupation Listed | 157 |
| 15 | irwin | edmund | M | 2 | Methodist | English | Ontario | No Occupation Listed | 240 |
| 13 | irwin | george | M | 14 | Methodist | English | Ontario | No Occupation Listed | 240 |
| 11 | irwin | hannorah | F | 34 | Methodist | Irish | Ireland | No Occupation Listed | 240 |
| 1 | irwin | ida | F | 2 | Presbyterian | Irish | Ontario | No Occupation Listed | 157 |
| 14 | irwin | james | M | 12 | Methodist | English | Ontario | No Occupation Listed | 240 |
| 24 | irwin | jane | F | 27 | Presbyterian | Irish | United States | No Occupation Listed | 157 |
| 23 | irwin | john | M | 30 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 157 |
| 10 | irwin | john | M | 38 | Methodist | English | England | Farmers, general and nfs | 240 |
| 12 | irwin | william | M | 16 | Methodist | English | Ontario | No Occupation Listed | 240 |