Residents of Waterloo S — Sub-district C, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 15 | oberholtzer | abraham | M | 46 | Mennonite | Dutch | Ontario | Farmers, general and nfs | 131 |
| 20 | oberholtzer | angeline | F | 6 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 22 | oberholtzer | bernice | F | 2 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 17 | oberholtzer | clarissa | F | 19 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 23 | oberholtzer | david | M | 15 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 21 | oberholtzer | emmaline | F | 4 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 19 | oberholtzer | josiah | M | 8 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 16 | oberholtzer | sarah | F | 40 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 18 | oberholtzer | sarah | F | 16 | Mennonite | Dutch | Ontario | No Occupation Listed | 131 |
| 23 | oberhotzer | margert | F | 72 | Methodist | German | Germany | No Occupation Listed | 109 |
| 3 | ocho | anthony | M | 18 | Evangelical | German | Ontario | Teachers (unspecified) | 93 |
| 2 | ocho | catherine | F | 38 | Evangelical | German | Ontario | No Occupation Listed | 93 |
| 5 | ocho | charles | M | 13 | Evangelical | German | Ontario | No Occupation Listed | 93 |
| 1 | ocho | gideon | M | 44 | Evangelical | German | Ontario | Farmers, general and nfs | 93 |
| 4 | ocho | issac | M | 16 | Evangelical | German | Ontario | No Occupation Listed | 93 |
| 6 | ocho | magdalena | F | 12 | Evangelical | German | Ontario | No Occupation Listed | 93 |
| 7 | ocho | margaret | F | 5 | Evangelical | German | Ontario | No Occupation Listed | 93 |
| 8 | ocho | minnie | F | 2 | Evangelical | German | Ontario | No Occupation Listed | 93 |
| 9 | ocho | william | M | 0 | Evangelical | German | Ontario | No Occupation Listed | 93 |
| 14 | offeny | lewis | M | 20 | Lutheran | Dutch | Ontario | Servants nfs | 291 |
| 3 | orr | andrew | M | 25 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 19 |
| 14 | orr | elisabath | F | 77 | Presbyterian | Scottish | Ontario | No Occupation Listed | 216 |
| 5 | orr | george | M | 17 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 19 |
| 9 | orr | george | M | 41 | Presbyterian | Scottish | Scotland | Labourers nfs | 216 |
| 13 | orr | john | M | 4 | Presbyterian | Scottish | Ontario | No Occupation Listed | 216 |
| 7 | orr | lida | F | 7 | Presbyterian | Scottish | Ontario | No Occupation Listed | 19 |
| 2 | orr | marget | F | 54 | Presbyterian | Scottish | Scotland | No Occupation Listed | 19 |
| 10 | orr | marget | F | 42 | Presbyterian | Scottish | Scotland | No Occupation Listed | 216 |
| 12 | orr | mary | F | 6 | Presbyterian | Scottish | Ontario | No Occupation Listed | 216 |
| 11 | orr | nelly | F | 9 | Presbyterian | Scottish | Ontario | No Occupation Listed | 216 |
| 1 | orr | robert | M | 56 | Presbyterian | Scottish | Scotland | Farmers, general and nfs | 19 |
| 4 | orr | robert | M | 19 | Presbyterian | Scottish | Ontario | Farmers, general and nfs | 19 |
| 6 | orr | william | M | 14 | Presbyterian | Scottish | Ontario | No Occupation Listed | 19 |
| 24 | ortwine | albert | M | 15 | Roman Catholic | German | Ontario | No Occupation Listed | 163 |
| 23 | ortwine | annie | F | 16 | Roman Catholic | German | Ontario | No Occupation Listed | 163 |
| 2 | ortwine | charles | M | 9 | Roman Catholic | German | Ontario | No Occupation Listed | 163 |
| 4 | ortwine | george | M | 5 | Roman Catholic | German | Ontario | No Occupation Listed | 163 |
| 20 | ortwine | john | M | 41 | Roman Catholic | German | Germany | Pedlars and hawkers | 163 |
| 22 | ortwine | john | M | 18 | Roman Catholic | German | Ontario | Pedlars and hawkers | 163 |
| 1 | ortwine | margret | F | 11 | Roman Catholic | German | Ontario | No Occupation Listed | 163 |
| 21 | ortwine | mary | F | 38 | Roman Catholic | Irish | Ireland | No Occupation Listed | 163 |
| 25 | ortwine | susan | F | 13 | Roman Catholic | German | Ontario | No Occupation Listed | 163 |
| 3 | ortwine | william | M | 7 | Roman Catholic | German | Ontario | No Occupation Listed | 163 |