| Subdistrict | Enum. district | # of links |
| Zone | 34 | 108 |
| Bothwell | 37 | 30 |
| Bothwell | 36 | 10 |
| Wallaceburg | 46 | 4 |
| Zone | 33 | 4 |
| Westminster Township | 23 | 4 |
| Weston | 41 | 3 |
| Chatham | 48 | 3 |
| London Township | 10 | 3 |
| Sandwich | 44 | 3 |
| Thamesville | 48 | 2 |
| Sarnia | 45 | 2 |
| Brandon | 53 | 1 |
| Euphemia | 38 | 1 |
| Howard | 21 | 1 |
| Rodney | 40 | 1 |