| Subdistrict | Enum. district | # of links |
| Bosanquet | 5 | 144 |
| Sarnia Indian Reserve | 58 | 25 |
| Bosanquet | 2 | 13 |
| Thedford | 66 | 12 |
| Plympton | 22 | 6 |
| Bosanquet | 3 | 5 |
| Forest | 50 | 4 |
| Plympton | 21 | 4 |
| Bosanquet | 4 | 3 |
| Mersea | 24 | 2 |
| Bosanquet | 6 | 2 |
| Plympton | 26 | 1 |
| Adelaide | 3 | 1 |
| Bosanquet | 1 | 1 |
| Townships 30 | 7 | 1 |
| Sarnia | 51 | 1 |