Residents of Hillsborough — Sub-district B, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 21 | obrian | p | M | 14 | Baptist | Irish | New Brunswick | No Occupation Listed | 99 |
| 21 | ofarrel | joseph | M | 60 | Roman Catholic | Irish | Ireland | Labourers nfs | 273 |
| 22 | ofarrel | mary | F | 50 | Roman Catholic | Irish | Ireland | No Occupation Listed | 273 |
| 8 | ogden | amasa | M | 21 | Baptist | German | New Brunswick | Farmers, general and nfs | 103 |
| 7 | ogden | david | M | 31 | Baptist | German | New Brunswick | Blacksmiths | 103 |
| 5 | ogden | elizabeth | F | 64 | Baptist | German | New Brunswick | No Occupation Listed | 103 |
| 6 | ogden | henry | M | 33 | Baptist | German | New Brunswick | Joiners | 103 |
| 4 | ogden | joshua | M | 61 | Baptist | German | New Brunswick | Farmers, general and nfs | 103 |
| 9 | ogden | lizie | F | 17 | Baptist | German | New Brunswick | No Occupation Listed | 103 |
| 1 | oneal | edward | M | 65 | Roman Catholic | Irish | Ireland | Engineers (US) nfs | 123 |
| 2 | oneal | jane | F | 85 | Roman Catholic | Scottish | Scotland | No Occupation Listed | 123 |
| 15 | oneal | mary | F | 30 | Baptist | Irish | New Brunswick | No Occupation Listed | 130 |
| 8 | oneal | rebecca | F | 84 | Wesleyan Methodist | German | New Brunswick | No Occupation Listed | 124 |
| 14 | oneal | william | M | 70 | Wesleyan Methodist | Irish | New Brunswick | Farmers, general and nfs | 130 |
| 16 | oneal | william | M | 24 | Baptist | Irish | New Brunswick | Labourers nfs | 130 |
| 8 | oniole | john | M | 59 | Baptist | Irish | Newfoundland | Boot and shoemakers and repairers | 203 |
| 10 | oniole | lemuel | M | 26 | Baptist | Irish | New Brunswick | Seamen | 203 |
| 11 | oniole | mary | F | 24 | Baptist | Irish | New Brunswick | Dressmakers | 203 |
| 9 | oniole | unice | F | 62 | Baptist | German | New Brunswick | No Occupation Listed | 203 |
| 9 | osbern | d | M | 8 | Baptist | Irish | New Brunswick | No Occupation Listed | 190 |
| 10 | osborn | george | M | 6 | Baptist | Irish | New Brunswick | No Occupation Listed | 190 |
| 1 | osborne | amanda | F | 3 | Baptist | Irish | New Brunswick | No Occupation Listed | 22 |
| 21 | osborne | andrew | M | 14 | Baptist | Irish | New Brunswick | No Occupation Listed | 22 |
| 25 | osborne | annie | F | 5 | Baptist | Irish | New Brunswick | No Occupation Listed | 22 |
| 14 | osborne | archie | M | 4 | Baptist | Irish | New Brunswick | No Occupation Listed | 133 |
| 15 | osborne | aubry | M | 0 | Baptist | Irish | New Brunswick | No Occupation Listed | 133 |
| 25 | osborne | bertha | F | 9 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 2 | osborne | carrie | F | 1 | Baptist | Irish | New Brunswick | No Occupation Listed | 22 |
| 22 | osborne | catherine | F | 12 | Baptist | Irish | New Brunswick | No Occupation Listed | 22 |
| 13 | osborne | charles | M | 13 | Baptist | Irish | New Brunswick | No Occupation Listed | 133 |
| 10 | osborne | eli | M | 16 | Baptist | Irish | New Brunswick | Labourers nfs | 230 |
| 19 | osborne | elizabeth | F | 40 | Baptist | German | New Brunswick | No Occupation Listed | 69 |
| 20 | osborne | elthea | F | 19 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 2 | osborne | evelina | F | 5 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 9 | osborne | frank | M | 17 | Baptist | Irish | New Brunswick | Labourers nfs | 230 |
| 11 | osborne | georgia | F | 3 | Baptist | Irish | New Brunswick | No Occupation Listed | 230 |
| 3 | osborne | harding | M | 1 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 18 | osborne | john | M | 46 | Baptist | Irish | New Brunswick | Farmers, general and nfs | 69 |
| 22 | osborne | jordan | M | 15 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 12 | osborne | joseph | M | 15 | Baptist | Irish | New Brunswick | No Occupation Listed | 133 |
| 23 | osborne | lavinia | F | 10 | Baptist | Irish | New Brunswick | No Occupation Listed | 22 |
| 7 | osborne | lena | F | 48 | Baptist | English | New Brunswick | No Occupation Listed | 230 |
| 21 | osborne | lois | F | 17 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 11 | osborne | lois | F | 35 | Baptist | Scottish | New Brunswick | No Occupation Listed | 133 |
| 20 | osborne | louisa | F | 37 | Baptist | English | New Brunswick | No Occupation Listed | 22 |
| 23 | osborne | martha | F | 13 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 8 | osborne | martha | F | 20 | Baptist | Irish | New Brunswick | No Occupation Listed | 230 |
| 1 | osborne | mary | F | 7 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 12 | osborne | maude | F | 1 | Baptist | Irish | New Brunswick | No Occupation Listed | 230 |
| 19 | osborne | moses | M | 41 | Baptist | Irish | New Brunswick | Farmers, general and nfs | 22 |
| 24 | osborne | moses | M | 7 | Baptist | Irish | New Brunswick | No Occupation Listed | 22 |
| 10 | osborne | samuel | M | 39 | Baptist | Irish | New Brunswick | Farmers, general and nfs | 133 |
| 24 | osborne | watson | M | 11 | Baptist | Irish | New Brunswick | No Occupation Listed | 69 |
| 6 | osborne | william | M | 47 | Baptist | Irish | New Brunswick | Labourers nfs | 230 |
| 2 | osman | charles | M | 30 | None | English | — | secretary a. man co | 255 |
| 3 | osman | laura | F | 24 | None | American | United States | No Occupation Listed | 255 |
| 4 | osman | mary | F | 2 | None | English | New Brunswick | No Occupation Listed | 255 |