Residents of Westminster — Sub-district A, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 5 | oar | ann | F | 28 | Anglican | Irish | Ontario | No Occupation Listed | 98 |
| 5 | oar | louisa | F | 17 | Anglican | English | England | Servants nfs | 115 |
| 20 | obrien | catherine | F | 53 | Presbyterian | Scottish | Scotland | No Occupation Listed | 246 |
| 21 | obrien | ellen | F | 27 | Presbyterian | Irish | Ontario | No Occupation Listed | 246 |
| 19 | obrien | james | M | 63 | Anglican | Irish | Ireland | Farmers, general and nfs | 246 |
| 23 | obrien | james | M | 22 | Presbyterian | Irish | Ontario | No Occupation Listed | 246 |
| 22 | obrien | joeseph | M | 18 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 246 |
| 6 | obrien | john | M | 28 | Roman Catholic | Irish | Ireland | Labourers nfs | 31 |
| 24 | obrien | thomas | M | 16 | Presbyterian | Irish | Ontario | No Occupation Listed | 246 |
| 22 | oc_ners | catherine | F | 55 | Methodist | Irish | Ireland | No Occupation Listed | 156 |
| 24 | oc_ners | catherine | F | 25 | Methodist | Irish | Ontario | No Occupation Listed | 156 |
| 25 | oc_ners | george | M | 17 | Methodist | Irish | Ontario | river drivers | 156 |
| 23 | oc_ners | john | M | 28 | Methodist | Irish | Ontario | river drivers | 156 |
| 22 | odell | agnes | F | 20 | Methodist | Scottish | Ontario | No Occupation Listed | 86 |
| 1 | odell | alley | F | 13 | Baptist | German | Ontario | No Occupation Listed | 494 |
| 23 | odell | clara | F | 14 | Methodist | Scottish | Ontario | No Occupation Listed | 86 |
| 21 | odell | cronelious | M | 25 | Methodist | Scottish | Ontario | Cooks | 86 |
| 25 | odell | eli | M | 16 | Baptist | German | Ontario | No Occupation Listed | 494 |
| 21 | odell | eliza | F | 59 | Methodist | Blank | Ontario | No Occupation Listed | 451 |
| 20 | odell | ellen | F | 12 | Methodist | English | Ontario | No Occupation Listed | 266 |
| 17 | odell | fannie | F | 44 | Methodist | French | Ontario | No Occupation Listed | 266 |
| 22 | odell | fanny | F | 24 | Methodist | German | Ontario | No Occupation Listed | 451 |
| 4 | odell | frederic | M | 1 | Methodist | Irish | Ontario | No Occupation Listed | 27 |
| 16 | odell | frederick | M | 53 | Anglican | English | Quebec | Blacksmiths | 266 |
| 19 | odell | frederick | M | 16 | Methodist | English | Ontario | No Occupation Listed | 266 |
| 23 | odell | hattie | F | 17 | Methodist | German | Ontario | No Occupation Listed | 451 |
| 2 | odell | henrietta | F | 9 | Methodist | Irish | Ontario | No Occupation Listed | 27 |
| 18 | odell | henry | M | 23 | Methodist | English | Ontario | No Occupation Listed | 266 |
| 24 | odell | henry | M | 22 | Anglican | English | England | No Occupation Listed | 237 |
| 23 | odell | jane | F | 44 | Baptist | Scottish | Ontario | No Occupation Listed | 494 |
| 22 | odell | jane | F | 56 | Anglican | English | England | No Occupation Listed | 237 |
| 3 | odell | jermiah | M | 7 | Baptist | German | Ontario | No Occupation Listed | 494 |
| 20 | odell | john | M | 31 | Methodist | Scottish | Ontario | Farmers, general and nfs | 86 |
| 2 | odell | john | M | 9 | Baptist | German | Ontario | No Occupation Listed | 494 |
| 21 | odell | leonard | M | 62 | Anglican | Irish | Ontario | Farmers, general and nfs | 237 |
| 22 | odell | lyman | M | 46 | Baptist | German | Ontario | Teamsters (inc. mine driver, etc.) | 494 |
| 18 | odell | marion | F | 60 | Methodist | Scottish | Scotland | No Occupation Listed | 86 |
| 25 | odell | melvyn | M | 25 | Methodist | German | Ontario | No Occupation Listed | 451 |
| 21 | odell | myreth | F | 8 | Methodist | English | Ontario | No Occupation Listed | 266 |
| 19 | odell | peter | M | 33 | Methodist | Scottish | Ontario | Farmers, general and nfs | 86 |
| 1 | odell | selena | F | 35 | Methodist | English | Ontario | No Occupation Listed | 27 |
| 25 | odell | william | M | 37 | Methodist | Irish | Ontario | Other agricultural and animal husbandry workers | 27 |
| 3 | odell | william | M | 3 | Methodist | Irish | Ontario | No Occupation Listed | 27 |
| 20 | odell | william | M | 57 | Methodist | German | Quebec | Hotel Keepers and Managers | 451 |
| 24 | odell | william | M | 29 | Methodist | German | Ontario | No Occupation Listed | 451 |
| 24 | odell | william | M | 18 | Baptist | German | Ontario | Labourers nfs | 494 |
| 23 | odle | ada | F | 9 | Presbyterian | Scottish | Ontario | No Occupation Listed | 207 |
| 21 | odle | annie | F | 13 | Presbyterian | Scottish | Ontario | No Occupation Listed | 207 |
| 22 | odle | carrie | F | 11 | Presbyterian | Scottish | Ontario | No Occupation Listed | 207 |
| 19 | odle | edwin | M | 39 | Presbyterian | Irish | Ontario | Labourers nfs | 207 |
| 20 | odle | janett | F | 37 | Presbyterian | Scottish | Ontario | No Occupation Listed | 207 |
| 24 | odle | maggie | F | 7 | Presbyterian | Scottish | Ontario | No Occupation Listed | 207 |
| 13 | odle | melvin | M | 48 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 205 |
| 5 | odonell | annie | F | 66 | Roman Catholic | Irish | Ireland | No Occupation Listed | 260 |
| 19 | oldaker | annie | F | 29 | Methodist | English | Ontario | No Occupation Listed | 158 |
| 18 | oldaker | george | M | 31 | Methodist | English | England | Machinists | 158 |
| 25 | olde | george | M | 0 | Presbyterian | Scottish | Ontario | No Occupation Listed | 207 |
| 2 | oliver | agnes | F | 35 | Presbyterian | Scottish | Ontario | Servants nfs | 97 |
| 20 | oliver | alexander | M | 20 | Roman Catholic | Scottish | Ontario | river drivers | 145 |
| 10 | oliver | alice | F | 23 | Methodist | Scottish | Ontario | No Occupation Listed | 275 |
| 13 | oliver | ann | F | 43 | Anglican | English | England | No Occupation Listed | 294 |
| 12 | oliver | william | M | 40 | Methodist | English | England | Caretakers and janitors | 294 |
| 22 | olmsted | george | M | 25 | Presbyterian | English | United States | Hotel Keepers and Managers | 33 |
| 14 | olmsted | lewis | M | 80 | Anglican | English | England | Farmers, general and nfs | 21 |
| 15 | olmsted | margaret | F | 21 | Anglican | English | Ontario | No Occupation Listed | 21 |
| 23 | olmsted | victoria | F | 22 | Presbyterian | English | Ontario | No Occupation Listed | 33 |
| 15 | olochlan | michael | M | 23 | Roman Catholic | Irish | Ireland | Labourers nfs | 566 |
| 8 | oneal | ester | F | 44 | Baptist | English | Ontario | No Occupation Listed | 289 |
| 7 | oneal | william | M | 58 | Baptist | Irish | United States | Farmers, general and nfs | 289 |
| 23 | oneall | eliza | F | 18 | Anglican | English | Ontario | No Occupation Listed | 176 |
| 18 | orchard | agness | F | 64 | Baptist | English | Scotland | No Occupation Listed | 206 |
| 10 | orchard | elizabeth | F | 33 | Methodist | Scottish | Ontario | No Occupation Listed | 41 |
| 9 | orchard | john | M | 34 | Methodist | English | Ontario | Teamsters (inc. mine driver, etc.) | 41 |
| 12 | orchard | john | M | 8 | Methodist | English | Ontario | No Occupation Listed | 41 |
| 13 | orchard | sarah | F | 6 | Methodist | English | Ontario | No Occupation Listed | 41 |
| 11 | orchard | william | M | 9 | Methodist | English | Ontario | No Occupation Listed | 41 |
| 17 | orchard | william | M | 60 | Anglican | English | England | Farmers, general and nfs | 206 |
| 24 | ormen | hattie | F | 8 | Anglican | English | Ontario | No Occupation Listed | 245 |
| 21 | ormen | jane | F | 23 | Anglican | English | Ontario | No Occupation Listed | 245 |
| 22 | ormen | mary | F | 18 | Anglican | English | Ontario | No Occupation Listed | 245 |
| 19 | ormen | matilda | F | 52 | Anglican | English | England | No Occupation Listed | 245 |
| 18 | ormen | merideth | M | 60 | Anglican | English | England | Farmers, general and nfs | 245 |
| 23 | ormen | trumen | M | 15 | Anglican | English | Ontario | Farmers, general and nfs | 245 |
| 20 | ormen | walter | M | 21 | Anglican | English | Ontario | Farmers, general and nfs | 245 |
| 4 | ormond | elisabeth | F | 41 | Anglican | English | England | No Occupation Listed | 199 |
| 3 | ormond | george | M | 43 | Anglican | English | Ontario | Farmers, general and nfs | 199 |
| 8 | ormond | georgina | F | 2 | Anglican | English | Ontario | No Occupation Listed | 199 |
| 6 | ormond | ida | F | 8 | Anglican | English | Ontario | No Occupation Listed | 199 |
| 5 | ormond | martha | F | 10 | Anglican | English | Ontario | No Occupation Listed | 199 |
| 7 | ormond | mary | F | 5 | Anglican | English | Ontario | No Occupation Listed | 199 |
| 3 | orr | george | M | 37 | Methodist | Irish | Ontario | Farmers, general and nfs | 35 |
| 6 | orr | george | M | 4 | Methodist | Irish | Ontario | No Occupation Listed | 35 |
| 2 | orr | jacob | M | 32 | Methodist | Irish | Ontario | Farmers, general and nfs | 34 |
| 13 | orr | james | M | 59 | Methodist | Irish | Canada | Farmers, general and nfs | 25 |
| 14 | orr | james | M | 28 | Methodist | Irish | Ontario | Farmers, general and nfs | 25 |
| 19 | orr | james | M | 0 | Methodist | Irish | Ontario | No Occupation Listed | 26 |
| 17 | orr | john | M | 25 | Methodist | Irish | Ontario | Farmers, general and nfs | 26 |
| 4 | orr | lucy | F | 28 | Methodist | Dutch | Ontario | No Occupation Listed | 35 |
| 5 | orr | mary | F | 7 | Methodist | Irish | Ontario | No Occupation Listed | 35 |
| 1 | orr | robert | M | 46 | Methodist | Irish | Ontario | Farmers, general and nfs | 34 |
| 15 | orr | sarah | F | 25 | Methodist | Irish | Ontario | No Occupation Listed | 25 |
| 18 | orr | sarah | F | 23 | Methodist | English | Ontario | No Occupation Listed | 26 |
| 25 | orr | thomas | M | 44 | Methodist | Irish | Ontario | Farmers, general and nfs | 34 |
| 16 | orr | william | M | 16 | Methodist | Irish | Ontario | Farmers, general and nfs | 25 |
| 2 | osborne | sarah | F | 23 | Presbyterian | Scottish | England | No Occupation Listed | 272 |
| 21 | osler | george | M | 50 | Anglican | English | England | river drivers | 15 |
| 13 | ottman | elizabeth | F | 24 | Methodist | English | United States | No Occupation Listed | 255 |
| 14 | ottman | eva | F | 0 | Methodist | German | Ontario | No Occupation Listed | 255 |
| 12 | ottman | james | M | 34 | Methodist | German | United States | Agent nfs | 255 |
| 7 | owen | hendry | M | 26 | Roman Catholic | Dutch | England | No Occupation Listed | 98 |