Residents of Brockville, Centre Ward—Quartier — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 24 | odonell | annie | F | 27 | Roman Catholic | Irish | Ontario | Clerk, nfs | 209 |
| 3 | odonell | john | M | 74 | Roman Catholic | Irish | Ireland | No Occupation Listed | 101 |
| 23 | odonell | mary | F | 67 | Roman Catholic | Irish | Ireland | No Occupation Listed | 209 |
| 4 | odonnell | mary | F | 34 | Roman Catholic | Irish | Ireland | No Occupation Listed | 7 |
| 5 | oliver | g | M | 52 | Presbyterian | Scottish | Ontario | Railway agents (US) and clerks | 128 |
| 19 | overell | arthur | M | 25 | Methodist | English | Quebec | law student | 62 |
| 18 | overell | charlotte | F | 50 | Methodist | English | England | No Occupation Listed | 62 |
| 17 | overell | edward | M | 52 | Methodist | English | England | Dealer, merchant etc. (Wholesale & retail trade) | 62 |
| 20 | overell | ella | F | 18 | Methodist | English | Ontario | No Occupation Listed | 62 |
| 22 | overell | melville | M | 10 | Methodist | English | Ontario | No Occupation Listed | 62 |
| 21 | overell | serena | F | 16 | Methodist | English | Ontario | No Occupation Listed | 62 |