| Subdistrict | Enum. district | # of links |
| Moore | 17 | 303 |
| Moore | 13 | 18 |
| Sarnia | 46 | 6 |
| Wallaceburg | 47 | 4 |
| Sarnia | 49 | 4 |
| Moore | 19 | 3 |
| Stratford | 39 | 3 |
| Moore | 14 | 3 |
| Courtright | 54 | 3 |
| Moore | 12 | 3 |
| Enniskillen | 34 | 2 |
| Moore | 18 | 2 |
| Sarnia | 34 | 1 |
| Sarnia | 31 | 1 |
| Ingersoll | 31 | 1 |
| Oil Springs | 64 | 1 |
| Southwold | 17 | 1 |
| Sarnia | 30 | 1 |