Residents of Cobourg, T-V — Sub-district D, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 8 | inderbitjin | agie | F | 5 | Roman Catholic | Dutch | Ontario | No Occupation Listed | 82 |
| 5 | inderbitjin | anthony | M | 15 | Roman Catholic | Dutch | Switzerland | No Occupation Listed | 82 |
| 6 | inderbitjin | charles | M | 14 | Roman Catholic | Dutch | Switzerland | No Occupation Listed | 82 |
| 9 | inderbitjin | edwd | M | 0 | Roman Catholic | Dutch | Ontario | No Occupation Listed | 82 |
| 2 | inderbitjin | fidel | M | 46 | Roman Catholic | Dutch | Switzerland | No Occupation Listed | 82 |
| 4 | inderbitjin | joseph | M | 17 | Roman Catholic | Dutch | Switzerland | No Occupation Listed | 82 |
| 3 | inderbitjin | josephine | F | 41 | Roman Catholic | Dutch | Switzerland | No Occupation Listed | 82 |
| 7 | inderbitjin | josephine | F | 12 | Roman Catholic | Dutch | Switzerland | No Occupation Listed | 82 |
| 1 | irvine | jane | F | 17 | Anglican | Irish | Ireland | No Occupation Listed | 352 |
| 2 | irvine | margaret | F | 15 | Anglican | Irish | Ireland | No Occupation Listed | 352 |
| 9 | irwin | alexander | M | 20 | Anglican | Irish | Ontario | Coopers etc. | 69 |
| 7 | irwin | lettia | F | 65 | Anglican | Irish | Ireland | No Occupation Listed | 69 |
| 8 | irwin | mary | F | 24 | Anglican | Irish | Ontario | No Occupation Listed | 69 |
| 6 | irwin | samuel | M | 32 | Anglican | Irish | Ontario | Coopers etc. | 69 |
| 17 | isaacson | a | F | 14 | Congregationalist | English | England | Servants nfs | 17 |
| 20 | isaacson | a | F | 0 | Congregationalist | English | England | No Occupation Listed | 17 |
| 18 | isaacson | eliza | F | 12 | Congregationalist | English | England | No Occupation Listed | 17 |
| 19 | isaacson | kate | F | 12 | Congregationalist | English | England | No Occupation Listed | 17 |
| 15 | isaacson | rebecca | F | 41 | Congregationalist | English | England | No Occupation Listed | 17 |
| 16 | isaacson | rebecca | F | 19 | Congregationalist | English | England | Tailors and tailoresses | 17 |
| 14 | isaacson | wm | M | 39 | Congregationalist | English | England | Carpenters | 17 |
| 2 | isrusuerville | jas | M | 84 | Anglican | Irish | Ireland | No Occupation Listed | 13 |
| 12 | iveson | alice | F | 4 | Methodist | English | Ontario | No Occupation Listed | 41 |
| 11 | iveson | catherine | F | 33 | Methodist | Irish | Ontario | No Occupation Listed | 41 |
| 10 | iveson | george | M | 34 | Methodist | English | Ontario | Teachers (unspecified) | 41 |