Residents of Southwold — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 5 | oconnor | maggie | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 167 |
| 2 | oconnor | martin | M | 65 | Roman Catholic | Irish | Ireland | Mason nfs or combined | 167 |
| 3 | oconnor | mary | F | 55 | Roman Catholic | Irish | Ireland | No Occupation Listed | 167 |
| 4 | oconnor | patsey | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 167 |
| 4 | odonald | ann | F | 89 | Anglican | Irish | Ireland | No Occupation Listed | 292 |
| 7 | olacey | almira | F | 48 | Episcopal Methodist | French | Ontario | No Occupation Listed | 203 |
| 10 | olacey | alzina | F | 21 | Episcopal Methodist | French | Ontario | No Occupation Listed | 203 |
| 9 | olacey | george | M | 3 | Episcopal Methodist | French | Ontario | No Occupation Listed | 203 |
| 8 | olacey | john | M | 7 | Episcopal Methodist | French | Ontario | No Occupation Listed | 203 |
| 11 | olacey | martha | F | 15 | Episcopal Methodist | French | Ontario | No Occupation Listed | 203 |
| 6 | olacey | stephen | M | 48 | Episcopal Methodist | French | Ontario | Cartwrights and wheelwrights | 203 |
| 3 | oldfield | clementine | F | 32 | Episcopal Methodist | English | Ontario | No Occupation Listed | 67 |
| 4 | oldfield | etta | F | 15 | Episcopal Methodist | English | Ontario | No Occupation Listed | 67 |
| 5 | oldfield | herman | M | 11 | Episcopal Methodist | English | Ontario | No Occupation Listed | 67 |
| 2 | oldfield | james | M | 52 | Episcopal Methodist | English | Ontario | Farmers, general and nfs | 67 |
| 18 | oliver | alace | F | 0 | Episcopal Methodist | English | Ontario | No Occupation Listed | 349 |
| 17 | oliver | archibald | M | 5 | Episcopal Methodist | English | Ontario | No Occupation Listed | 349 |
| 16 | oliver | clara | F | 10 | Episcopal Methodist | English | Ontario | No Occupation Listed | 349 |
| 14 | oliver | john | M | 14 | Episcopal Methodist | English | Ontario | No Occupation Listed | 349 |
| 15 | oliver | laura | F | 12 | Episcopal Methodist | English | Ontario | No Occupation Listed | 349 |
| 12 | oliver | nancy | F | 39 | Episcopal Methodist | Irish | Ontario | No Occupation Listed | 349 |
| 11 | oliver | william | M | 40 | Anglican | English | England | Tailors and tailoresses | 349 |
| 13 | oliver | william | M | 15 | Episcopal Methodist | English | Ontario | No Occupation Listed | 349 |
| 3 | olver | arthur | M | 4 | Methodist | English | Ontario | No Occupation Listed | 279 |
| 4 | olver | elizebeth | F | 18 | Methodist | English | Ontario | No Occupation Listed | 279 |
| 4 | olver | fanny | F | 68 | Reformed Episcopal | English | England | No Occupation Listed | 297 |
| 3 | olver | henry | M | 66 | Reformed Episcopal | English | England | Farmers, general and nfs | 297 |
| 24 | olver | john | M | 44 | Methodist | English | England | Farmers, general and nfs | 279 |
| 2 | olver | john | M | 15 | Methodist | English | Ontario | No Occupation Listed | 279 |
| 25 | olver | margret | F | 44 | Methodist | Irish | Ireland | No Occupation Listed | 279 |
| 1 | olver | richard | M | 39 | Methodist | English | England | Labourers nfs | 312 |
| 17 | olver | susan | F | 39 | Anglican | English | Ontario | No Occupation Listed | 240 |
| 5 | olver | susan | F | 7 | Methodist | English | Ontario | No Occupation Listed | 279 |
| 16 | olver | thomas | M | 34 | Anglican | English | Ontario | Hotel Keepers and Managers | 240 |
| 18 | olver | verner | M | 7 | Anglican | English | Ontario | No Occupation Listed | 240 |
| 1 | olver | william | M | 17 | Methodist | English | Ontario | No Occupation Listed | 279 |
| 14 | orchard | bertha | F | 8 | Baptist | English | Ontario | No Occupation Listed | 194 |
| 11 | orchard | edwin | M | 0 | | English | Ontario | No Occupation Listed | 26 |
| 15 | orchard | eloice | F | 6 | Baptist | English | Ontario | No Occupation Listed | 194 |
| 13 | orchard | emily | F | 32 | Baptist | English | Ontario | No Occupation Listed | 194 |
| 20 | orchard | everand | M | 10 | Methodist | English | Ontario | No Occupation Listed | 213 |
| 15 | orchard | hattie | F | 21 | Methodist | English | Ontario | No Occupation Listed | 212 |
| 18 | orchard | henry | M | 32 | Methodist | English | Ontario | Farmers, general and nfs | 213 |
| 13 | orchard | james | M | 24 | Methodist | English | Ontario | Farmers, general and nfs | 212 |
| 9 | orchard | joanna | F | 24 | | English | Ontario | No Occupation Listed | 26 |
| 12 | orchard | john | M | 70 | Anglican | English | England | Farmers, general and nfs | 212 |
| 24 | orchard | john | M | 10 | Episcopal Methodist | English | Ontario | No Occupation Listed | 231 |
| 13 | orchard | joseph | M | 67 | Calvinistic Baptist | English | England | speculator | 121 |
| 25 | orchard | mabel | F | 3 | Episcopal Methodist | English | Ontario | No Occupation Listed | 231 |
| 22 | orchard | maggie | F | 13 | Episcopal Methodist | English | Ontario | No Occupation Listed | 231 |
| 14 | orchard | mary | F | 24 | Methodist | Scottish | Ontario | No Occupation Listed | 212 |
| 14 | orchard | maryan | F | 63 | Calvinistic Baptist | English | England | No Occupation Listed | 121 |
| 17 | orchard | nellie | F | 10 | Methodist | English | Ontario | No Occupation Listed | 212 |
| 16 | orchard | nelson | M | 16 | Methodist | English | Ontario | No Occupation Listed | 212 |
| 21 | orchard | olive | F | 44 | Episcopal Methodist | English | Ontario | No Occupation Listed | 231 |
| 23 | orchard | richard | M | 12 | Episcopal Methodist | English | Ontario | No Occupation Listed | 231 |
| 19 | orchard | sarah | F | 28 | Methodist | Irish | Ontario | No Occupation Listed | 213 |
| 12 | orchard | thomas | M | 36 | Baptist | English | Ontario | Farmers, general and nfs | 194 |
| 10 | orchard | wilford | M | 2 | | English | Ontario | No Occupation Listed | 26 |
| 20 | orchard | william | M | 44 | Episcopal Methodist | English | Ontario | Coach, carriage, cart and wagon makers | 231 |
| 15 | orchard | | M | 30 | Calvinistic Baptist | English | Ontario | No Occupation Listed | 121 |
| 4 | ordish | janet | F | 46 | Presbyterian | Scottish | Scotland | No Occupation Listed | 54 |
| 23 | orr | johnson | M | 33 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 17 |
| 25 | orr | johnson | M | 3 | Presbyterian | Irish | Ontario | No Occupation Listed | 17 |
| 24 | orr | margaret | F | 33 | Presbyterian | Scottish | Ontario | No Occupation Listed | 17 |
| 3 | osbourne | amelia | F | 6 | Presbyterian | Irish | Ontario | No Occupation Listed | 85 |
| 4 | osbourne | christy | F | 4 | Presbyterian | Irish | Ontario | No Occupation Listed | 85 |
| 25 | osbourne | esther | F | 15 | Presbyterian | Irish | Ontario | No Occupation Listed | 85 |
| 21 | osbourne | hugh | M | 51 | Presbyterian | Irish | Ireland | Farmers, general and nfs | 85 |
| 2 | osbourne | hugh | M | 10 | Presbyterian | Irish | Ontario | No Occupation Listed | 85 |
| 23 | osbourne | james | M | 25 | Presbyterian | Irish | Ontario | Farmers, general and nfs | 85 |
| 1 | osbourne | margaret | F | 13 | Presbyterian | Irish | Ontario | No Occupation Listed | 85 |
| 24 | osbourne | mary | F | 17 | Presbyterian | Irish | Ontario | No Occupation Listed | 85 |
| 22 | osbourne | selina | F | 47 | Anglican | Irish | Ireland | No Occupation Listed | 85 |
| 3 | overhalt | ann | F | 48 | Roman Catholic | Irish | Ireland | No Occupation Listed | 305 |
| 6 | overhalt | ellen | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 305 |
| 2 | overhalt | james | M | 40 | Roman Catholic | German | Ontario | Labourers nfs | 305 |
| 4 | overhalt | james | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 305 |
| 5 | overhalt | joseph | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 305 |
| 7 | overhalt | mary | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 305 |