Residents of Port Dalhousie, VL — Sub-district G, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 13 | irwin | eliza | F | 33 | Anglican | Irish | Canada | No Occupation Listed | 72 |
| 22 | irwin | george | M | 17 | Anglican | English | Ontario | No Occupation Listed | 168 |
| 16 | irwin | harvey | M | 1 | Anglican | Irish | Canada | No Occupation Listed | 72 |
| 12 | irwin | john | M | 34 | Anglican | Irish | Canada | Ships Masters and captains (Sea or Inland Waterways) | 72 |
| 20 | irwin | mary | F | 49 | Anglican | English | Ontario | No Occupation Listed | 168 |
| 14 | irwin | melville | M | 10 | Anglican | Irish | Canada | No Occupation Listed | 72 |
| 15 | irwin | william | M | 5 | Anglican | Irish | Canada | No Occupation Listed | 72 |