Residents of March — Sub-district F, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 18 | obrian | margit | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 244 |
| 4 | oconner | ann | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 88 |
| 1 | oconner | catherin | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 88 |
| 23 | oconner | danial | M | 41 | Roman Catholic | Irish | Ireland | Teachers (unspecified) | 88 |
| 2 | oconner | elizabeth | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 88 |
| 3 | oconner | james | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 88 |
| 24 | oconnor | catherin | F | 35 | Roman Catholic | Irish | Ontario | No Occupation Listed | 88 |
| 25 | oconnor | mary | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 88 |
| 24 | ohara | bridget | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 120 |
| 5 | ohara | briget | F | 32 | Roman Catholic | Irish | Quebec | No Occupation Listed | 122 |
| 7 | ohara | briget | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 8 | ohara | florence | F | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 1 | ohara | james | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 120 |
| 22 | ohara | john | M | 25 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 120 |
| 25 | ohara | joseph | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 120 |
| 21 | ohara | margret | F | 26 | Roman Catholic | Irish | Ontario | No Occupation Listed | 120 |
| 9 | ohara | margret | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 20 | ohara | mary | F | 55 | Roman Catholic | Irish | Ireland | No Occupation Listed | 120 |
| 6 | ohara | may | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 122 |
| 23 | ohara | philip | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 120 |
| 19 | ohara | thomas | M | 60 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 120 |
| 4 | ohara | thomas | M | 34 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 122 |
| 5 | oneal | briget | F | 54 | Roman Catholic | Irish | Ontario | No Occupation Listed | 24 |
| 9 | oneal | briget | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 24 |
| 4 | oneal | henery | M | 55 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 24 |
| 10 | oneal | henery | M | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 24 |
| 8 | oneal | james | M | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 24 |
| 6 | oneal | john | M | 25 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 24 |
| 7 | oneal | william | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 24 |
| 15 | onealy | edward | M | 24 | Roman Catholic | Irish | Ontario | Blacksmiths | 118 |
| 9 | onealy | francis | M | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 145 |
| 17 | onealy | ida | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 6 | onealy | jane | F | 53 | Roman Catholic | Irish | Ontario | No Occupation Listed | 145 |
| 7 | onealy | john | M | 29 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 145 |
| 16 | onealy | margret | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 10 | onealy | michle | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 145 |
| 5 | onealy | patrick | M | 64 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 145 |
| 8 | onealy | patrick | M | 21 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 145 |
| 19 | or | aumaria | F | 8 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 16 | or | esebba | F | 32 | Presbyterian | Irish | Quebec | No Occupation Listed | 129 |
| 20 | or | george | M | 5 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 18 | or | john | M | 10 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 15 | or | joseph | M | 42 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 129 |
| 21 | or | joseph | M | 1 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 17 | or | william | M | 12 | Presbyterian | Irish | Ontario | No Occupation Listed | 129 |
| 23 | orchard | philip | M | 60 | Anglican | English | England | Farmers, general and nfs | 154 |
| 24 | orchard | sarahan | F | 55 | Anglican | English | England | No Occupation Listed | 154 |
| 2 | orcherd | francis | M | 22 | Anglican | English | England | No Occupation Listed | 155 |