Residents of St. Catharines, C — Sub-district A, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 22 | ihring | allice | F | 20 | Anglican | English | England | No Occupation Listed | 32 |
| 20 | ihring | catharine | F | 49 | Anglican | English | England | No Occupation Listed | 32 |
| 24 | ihring | frank | M | 12 | Anglican | English | England | No Occupation Listed | 32 |
| 21 | ihring | fredrick | M | 24 | Anglican | English | England | Seamen | 32 |
| 23 | ihring | rosetta | F | 14 | Anglican | English | England | No Occupation Listed | 32 |
| 24 | ingersoll | florence | F | 12 | Anglican | English | Ontario | No Occupation Listed | 173 |
| 20 | ingersoll | frances | F | 49 | Anglican | English | United States | No Occupation Listed | 173 |
| 23 | ingersoll | frank | M | 19 | Anglican | English | Ontario | Bank tellers | 173 |
| 22 | ingersoll | james | M | 23 | Anglican | English | Ontario | law student | 173 |
| 21 | ingersoll | minnie | F | 25 | Anglican | English | Ontario | No Occupation Listed | 173 |
| 22 | ingraham | ann | F | 77 | Wesleyan Methodist | Irish | Ireland | No Occupation Listed | 317 |
| 23 | ingraham | mary | F | 48 | Anglican | Irish | United States | No Occupation Listed | 317 |
| 21 | ireson | maria | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 242 |
| 20 | ireson | mathew | M | 58 | Anglican | English | England | Drivers (general haulage) | 242 |
| 18 | irwin | ellen | F | 19 | Roman Catholic | Irish | Ontario | Milliners | 273 |
| 16 | irwin | frank | M | 25 | Roman Catholic | Irish | Ontario | Agent nfs | 273 |
| 17 | irwin | maria | F | 23 | Roman Catholic | Irish | Ontario | Tailors and tailoresses | 273 |
| 15 | irwin | mary | F | 48 | Roman Catholic | Irish | Ontario | Seamstress | 273 |
| 1 | iszard | rhoda | F | 21 | Anglican | English | Ontario | No Occupation Listed | 42 |