| Subdistrict | Enum. district | # of links |
| Bosanquet | 6 | 129 |
| Sarnia Indian Reserve | 58 | 69 |
| Bosanquet | 4 | 24 |
| Forest | 50 | 7 |
| Fort William | 26 | 6 |
| Forest | 51 | 6 |
| Bosanquet | 5 | 5 |
| Sarnia | 31 | 3 |
| Townships 16 | 18 | 2 |
| Petrolia | 52 | 1 |
| Sarnia | 45 | 1 |
| Plympton | 22 | 1 |
| Bosanquet | 1 | 1 |
| Adelaide | 3 | 1 |
| Forest | 49 | 1 |
| Petrolia | 55 | 1 |
| Sarnia | 33 | 1 |
| Dymond | 49 | 1 |