Residents of Halifax, Ward—Quartier No. 4 — Sub-district D, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 20 | obrien | ann | F | 47 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 174 |
| 11 | obrien | bridget | F | 38 | Roman Catholic | Irish | Ireland | No Occupation Listed | 168 |
| 24 | obrien | charles | M | 10 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 174 |
| 19 | obrien | edward | M | 48 | Roman Catholic | Irish | England | Teamsters (inc. mine driver, etc.) | 174 |
| 3 | obrien | ellen | F | 18 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 124 |
| 16 | obrien | ellen | F | 25 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 5 |
| 25 | obrien | george | M | 8 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 174 |
| 21 | obrien | jane | F | 20 | Roman Catholic | Irish | Nova Scotia | Dealer, merchant etc. (Wholesale & retail trade) | 174 |
| 18 | obrien | jane | F | 4 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 5 |
| 1 | obrien | john | M | 15 | Roman Catholic | Irish | Nova Scotia | Labourers nfs | 124 |
| 15 | obrien | john | M | 32 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 5 |
| 10 | obrien | lizzie | F | 11 | Roman Catholic | Irish | United States | No Occupation Listed | 168 |
| 19 | obrien | margaret | F | 45 | Roman Catholic | English | New Brunswick | No Occupation Listed | 105 |
| 22 | obrien | martha | F | 18 | Roman Catholic | Irish | Nova Scotia | Other Upholsterers and Related Workers | 174 |
| 24 | obrien | mary | F | 25 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 141 |
| 4 | obrien | maude | F | 11 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 124 |
| 17 | obrien | minnie | F | 5 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 5 |
| 25 | obrien | suzan | F | 50 | Roman Catholic | English | Nova Scotia | No Occupation Listed | 124 |
| 23 | obrien | suzan | F | 16 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 174 |
| 24 | obrien | thomas | M | 51 | Roman Catholic | Irish | Ireland | Tailors and tailoresses | 124 |
| 2 | obrien | thomas | M | 25 | Roman Catholic | Irish | Nova Scotia | Painters, nfs | 124 |
| 18 | obrien | william | M | 40 | Anglican | English | England | Labourers nfs | 105 |
| 20 | oconnell | john | M | 20 | Roman Catholic | Irish | Nova Scotia | Coopers etc. | 65 |
| 19 | oconnell | margaret | F | 63 | Roman Catholic | Irish | Ireland | No Occupation Listed | 65 |
| 24 | ohearn | allice | F | 9 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 90 |
| 7 | ohearn | caroline | F | 29 | Roman Catholic | English | Nova Scotia | No Occupation Listed | 138 |
| 10 | ohearn | caroline | F | 1 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 138 |
| 22 | ohearn | elizabeth | F | 40 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 90 |
| 21 | ohearn | james | M | 54 | Roman Catholic | Irish | Newfoundland | Labourers nfs | 90 |
| 23 | ohearn | james | M | 14 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 90 |
| 11 | ohearn | james | M | 9 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 38 |
| 7 | ohearn | johannah | F | 42 | Roman Catholic | Irish | Newfoundland | No Occupation Listed | 38 |
| 13 | ohearn | johannah | F | 3 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 38 |
| 9 | ohearn | john | M | 14 | Roman Catholic | Irish | Newfoundland | No Occupation Listed | 38 |
| 6 | ohearn | john | M | 31 | Roman Catholic | Irish | Ireland | Cabinet makers | 138 |
| 8 | ohearn | john | M | 4 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 138 |
| 9 | ohearn | joseph | M | 3 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 138 |
| 8 | ohearn | maggie | F | 15 | Roman Catholic | Irish | Newfoundland | No Occupation Listed | 38 |
| 10 | ohearn | michael | M | 11 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 38 |
| 14 | ohearn | michael | M | 44 | Roman Catholic | Irish | Newfoundland | Bakers | 38 |
| 25 | ohearn | thomas | M | 4 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 90 |
| 12 | ohearn | william | M | 5 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 38 |
| 14 | oneil | annie | F | 42 | Presbyterian | Scottish | Nova Scotia | No Occupation Listed | 70 |
| 13 | oneil | michael | M | 42 | Roman Catholic | Irish | Ireland | Labourers nfs | 70 |
| 24 | orman | albert | M | 16 | Methodist | Scottish | Nova Scotia | Tailors and tailoresses | 226 |
| 23 | orman | jane | F | 32 | Methodist | Scottish | Nova Scotia | No Occupation Listed | 226 |
| 2 | orman | margaret | F | 55 | Roman Catholic | Irish | Ireland | No Occupation Listed | 53 |
| 20 | orman | margaret | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 152 |
| 3 | orman | michel | M | 23 | Roman Catholic | Irish | Nova Scotia | Labourers nfs | 53 |
| 19 | orman | michl | M | 40 | Roman Catholic | Irish | Ireland | Labourers nfs | 152 |
| 22 | orman | michl | M | 7 | Roman Catholic | Irish | Nova Scotia | No Occupation Listed | 152 |
| 25 | orman | sidney | M | 14 | Methodist | Scottish | Nova Scotia | No Occupation Listed | 226 |
| 21 | orman | thomas | M | 19 | Roman Catholic | Irish | Nova Scotia | Engineers (US) nfs | 152 |
| 22 | orman | thomas | M | 36 | Methodist | Scottish | Nova Scotia | Labourers nfs | 226 |