Residents of Otonabee — Sub-district R, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 25 | obrein | edward | M | 26 | Presbyterian | Irish | Ontario | Labourers nfs | 49 |
| 3 | obrein | john | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 2 | obrein | josaphine | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 1 | obrein | julian | F | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 1 | obrein | mary | F | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 49 |
| 2 | obrein | micheal | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 19 | obrien | alexander | M | 65 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 57 |
| 21 | obrien | alexander | M | 26 | Roman Catholic | Irish | Ontario | Labourers nfs | 57 |
| 8 | obrien | bridget | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 22 | obrien | catharine | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 3 | obrien | cathrene | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 4 | obrien | daniel | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 1 | obrien | edward | M | 50 | Roman Catholic | Irish | Ireland | Labourers nfs | 91 |
| 6 | obrien | edward | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 4 | obrien | eliza | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 5 | obrien | elizabeth | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 20 | obrien | helen | F | 52 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 24 | obrien | james | M | 18 | Roman Catholic | Irish | Ontario | Labourers nfs | 57 |
| 2 | obrien | james | M | 18 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 118 |
| 23 | obrien | johanah | F | 48 | Roman Catholic | Irish | Ireland | No Occupation Listed | 118 |
| 2 | obrien | john | M | 20 | Roman Catholic | Irish | Ontario | Labourers nfs | 91 |
| 25 | obrien | john | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 118 |
| 25 | obrien | margret | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 5 | obrien | margret | F | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 9 | obrien | margret | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 91 |
| 7 | obrien | micheal | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 24 | obrien | micheal | M | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 118 |
| 22 | obrien | morris | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 118 |
| 1 | obrien | patrick | M | 20 | Roman Catholic | Irish | Ontario | Teachers (unspecified) | 118 |
| 16 | obrien | thomas | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 47 |
| 23 | obrien | william | M | 20 | Roman Catholic | Irish | Ontario | Labourers nfs | 57 |
| 3 | obrien | william | M | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 3 | oconnor | catherine | F | 26 | Roman Catholic | Irish | Ontario | No Occupation Listed | 47 |
| 5 | oconnor | francis | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 47 |
| 22 | oconnor | isabella | F | 64 | Roman Catholic | Irish | Ireland | No Occupation Listed | 54 |
| 2 | oconnor | john | M | 26 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 47 |
| 21 | oconnor | john | M | 68 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 54 |
| 4 | oconnor | mary | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 47 |
| 23 | oconnor | sarah | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 54 |
| 1 | oconnors | frances | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 23 | oconnors | helen | F | 32 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 4 | oconnors | hugh | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 25 | oconnors | isabella | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 22 | oconnors | james | M | 35 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 61 |
| 2 | oconnors | james | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 24 | oconnors | john | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 3 | oconnors | margaret | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 6 | oconnors | mary | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 5 | oconnors | william | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 61 |
| 1 | olarey | bridget | F | 32 | Roman Catholic | Irish | Ontario | No Occupation Listed | 50 |
| 9 | olarey | bridget | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 24 | olarey | cathrine | F | 38 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 4 | olarey | daniel | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 50 |
| 21 | olarey | daniel | M | 25 | Roman Catholic | Irish | Ontario | Labourers nfs | 56 |
| 8 | olarey | daniel | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 5 | olarey | daniuef | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 2 | olarey | elizabeth | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 2 | olarey | ellen | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 50 |
| 23 | olarey | ellen | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 56 |
| 2 | olarey | ellen | F | 60 | Roman Catholic | Irish | Ireland | No Occupation Listed | 56 |
| 5 | olarey | ellen | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 1 | olarey | elmy | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 56 |
| 3 | olarey | hannorah | F | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 25 | olarey | john | M | 34 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 50 |
| 23 | olarey | john | M | 41 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 53 |
| 1 | olarey | john | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 22 | olarey | margret | F | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 56 |
| 25 | olarey | margret | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 56 |
| 6 | olarey | margret | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 4 | olarey | maricue | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 3 | olarey | mary | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 50 |
| 7 | olarey | mary | F | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 24 | olarey | mary | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 56 |
| 4 | olarey | mary | F | 31 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 7 | olarey | mary | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 8 | olarey | mickal | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 25 | olarey | patrick | M | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 10 | olarey | treass | F | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 6 | olarey | william | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 3 | olarey | william | M | 38 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 57 |
| 11 | olarey | william | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 57 |
| 25 | olorey | bridget | F | 27 | Roman Catholic | Irish | Ontario | No Occupation Listed | 119 |
| 2 | olorey | mary | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 119 |
| 24 | olorey | patrick | M | 31 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 119 |
| 1 | olorey | patrick | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 119 |
| 7 | orde | agness | F | 12 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 6 | orde | dick | M | 14 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 9 | orde | francis | F | 8 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 8 | orde | helena | F | 10 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 10 | orde | henry | M | 6 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 12 | orde | leonard | M | 2 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 13 | orde | margarett | F | 67 | Anglican | English | Wales | No Occupation Listed | 93 |
| 11 | orde | nora | F | 4 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 4 | orde | robert | M | 41 | Anglican | English | Ontario | Farmers, general and nfs | 92 |
| 5 | orde | thomas | F | 41 | Anglican | English | Ontario | No Occupation Listed | 92 |
| 2 | osborne | cecile | F | 3 | Methodist | English | Ontario | No Occupation Listed | 32 |
| 4 | osborne | charles | M | 25 | Methodist | English | Ontario | Clerk, nfs | 32 |
| 3 | osborne | emma | F | 23 | Methodist | English | Ontario | No Occupation Listed | 32 |
| 1 | osborne | mary | F | 31 | Methodist | Irish | Ontario | No Occupation Listed | 32 |
| 25 | osborne | william | M | 33 | Methodist | English | Ontario | Millers and related workers | 32 |
| 2 | osulivan | catherine | F | 49 | Roman Catholic | Irish | Ontario | No Occupation Listed | 72 |
| 7 | osulivan | dennis | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 72 |
| 4 | osulivan | ellen | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 72 |
| 3 | osulivan | john | M | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 72 |
| 1 | osulivan | michael | M | 65 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 72 |
| 5 | osulivan | michael | M | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 72 |
| 6 | osulivan | patrick | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 72 |