| Subdistrict | Enum. district | # of links |
| Petrolia | 55 | 192 |
| Petrolia | 56 | 26 |
| Petrolia | 53 | 16 |
| Petrolia | 52 | 14 |
| Petrolia | 54 | 11 |
| Sarnia | 51 | 11 |
| Petrolia | 57 | 6 |
| London | 17 | 4 |
| London | 30 | 4 |
| Enniskillen | 25 | 4 |
| Enniskillen | 33 | 3 |
| Townships 30 | 7 | 3 |
| Petrolia | 59 | 3 |
| Sarnia | 49 | 3 |
| Owen Sound | 43 | 3 |
| Yorkton | 29 | 2 |
| Sarnia | 47 | 2 |
| Moore | 17 | 2 |
| St. Thomas | 32 | 2 |
| London Township | 10 | 2 |
| Plympton | 24 | 2 |
| Township 30 in ranges 7 | 38 | 2 |
| Warwick | 42 | 2 |
| London | 5 | 2 |
| Winnipeg | 9 | 1 |
| Townships 1 | 2 | 1 |
| Sarnia | 52 | 1 |
| Norwich North | 8 | 1 |
| Sarnia | 31 | 1 |
| Enniskillen | 32 | 1 |
| Steelton | 17 | 1 |
| Mornington | 25 | 1 |
| London | 43 | 1 |
| Brantford | 21 | 1 |
| West Lorne | 41 | 1 |
| Okanagan | 39 | 1 |
| Oil Springs | 64 | 1 |
| Townships 39 | 21 | 1 |
| Sarnia | 44 | 1 |