| Subdistrict | Enum. district | # of links |
| Oil Springs | 65 | 120 |
| Oil Springs | 64 | 18 |
| Enniskillen | 20 | 8 |
| Petrolia | 55 | 7 |
| Moore | 17 | 5 |
| Wallaceburg | 46 | 5 |
| Petrolia | 60 | 4 |
| Petrolia | 58 | 3 |
| Plympton | 24 | 3 |
| Dawn | 7 | 3 |
| Enniskillen | 21 | 3 |
| Petrolia | 56 | 3 |
| Enniskillen | 33 | 2 |
| Petrolia | 57 | 1 |
| Sarnia | 44 | 1 |
| Camden | 6 | 1 |
| Dawn | 2 | 1 |
| London | 8 | 1 |