| Subdistrict | Enum. district | # of links |
| Plympton | 24 | 194 |
| Sarnia | 46 | 15 |
| Wyoming | 57 | 7 |
| Petrolia | 55 | 6 |
| Sarnia | 29 | 6 |
| Enniskillen | 33 | 4 |
| Plympton | 27 | 4 |
| Bosanquet | 2 | 3 |
| Petrolia | 52 | 3 |
| Sarnia | 49 | 3 |
| Petrolia | 56 | 3 |
| London Township | 8 | 2 |
| McGillivray | 17 | 2 |
| Sarnia | 50 | 1 |
| Winnipeg | 19 | 1 |
| Plympton | 22 | 1 |
| Enniskillen | 32 | 1 |
| Bothwell | 37 | 1 |