Residents of Portland — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 22 | obbason | ann | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 292 |
| 25 | obbason | ann | F | 29 | Roman Catholic | Irish | Ontario | No Occupation Listed | 293 |
| 23 | obbason | bridget | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 292 |
| 21 | obbason | catharine | F | 31 | Roman Catholic | Irish | Ontario | No Occupation Listed | 292 |
| 24 | obbason | frances | M | 30 | Methodist | Irish | Ontario | Carpenters | 293 |
| 1 | obbason | gertrude | F | 8 | | Blank | Ontario | No Occupation Listed | 293 |
| 2 | obbason | james | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 293 |
| 3 | obbason | luna | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 293 |
| 4 | obbason | nancy | F | 72 | Methodist | German | Ontario | No Occupation Listed | 294 |
| 20 | obbason | thomason | M | 42 | Methodist | German | Ontario | Farmers, general and nfs | 292 |
| 24 | odonnell | margret | F | 56 | Roman Catholic | Irish | Ireland | No Occupation Listed | 90 |
| 25 | odonnell | thomas | M | 17 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 90 |
| 17 | olbason | ann | F | 47 | Episcopal Methodist | German | Ontario | No Occupation Listed | 425 |
| 19 | olbason | edwin | M | 17 | Episcopal Methodist | German | Ontario | No Occupation Listed | 425 |
| 16 | olbason | george | M | 49 | Episcopal Methodist | German | Ontario | Carpenters | 425 |
| 21 | olbason | joseph | M | 12 | Episcopal Methodist | German | Ontario | No Occupation Listed | 425 |
| 20 | olbason | mary | F | 14 | Episcopal Methodist | German | Ontario | No Occupation Listed | 425 |
| 22 | olbason | nelson | M | 7 | Episcopal Methodist | German | Ontario | No Occupation Listed | 425 |
| 18 | olbason | thomas | M | 20 | Episcopal Methodist | German | Ontario | Farmers, general and nfs | 425 |
| 18 | oneill | cathrine | F | 37 | Roman Catholic | Irish | Ireland | No Occupation Listed | 93 |
| 20 | oneill | edward | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 93 |
| 17 | oneill | john | M | 39 | Roman Catholic | Irish | Ireland | river drivers | 93 |
| 19 | oneill | joseph | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 93 |
| 5 | oniel | cathrine | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 367 |
| 4 | oniel | charles | M | 32 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 367 |
| 11 | orr | cathrine | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 45 |
| 10 | orr | danual | M | 26 | Roman Catholic | Irish | Ontario | Foremen and supervisors, railways | 45 |
| 12 | orr | danual | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 45 |
| 6 | orr | elizabeth | F | 38 | Presbyterian | Irish | Ontario | No Occupation Listed | 140 |
| 5 | orr | joseph | M | 40 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 140 |
| 7 | orr | r | M | 12 | Presbyterian | Irish | Ontario | No Occupation Listed | 140 |
| 2 | orser | adlins | F | 32 | Episcopal Methodist | German | Ontario | No Occupation Listed | 481 |
| 3 | orser | ambrose | M | 9 | Episcopal Methodist | German | Ontario | No Occupation Listed | 481 |
| 1 | orser | isaiah | M | 35 | Episcopal Methodist | German | Ontario | Teachers (unspecified) | 481 |
| 3 | ossor | gilbert | M | 56 | Episcopal Methodist | German | Ontario | river drivers | 543 |
| 4 | ossor | mary | F | 78 | Episcopal Methodist | German | United States | No Occupation Listed | 543 |