| Subdistrict | Enum. district | # of links |
| Chatham | 17 | 133 |
| Wallaceburg | 46 | 25 |
| Dover | 5 | 11 |
| Chatham | 14 | 8 |
| Harwich | 19 | 7 |
| Chatham Township | 16 | 7 |
| Wallaceburg | 45 | 7 |
| Chatham | 11 | 6 |
| Chatham | 12 | 6 |
| Sombra | 35 | 6 |
| Sombra | 43 | 5 |
| Dover | 3 | 5 |
| Wallaceburg | 47 | 4 |
| Sarnia | 47 | 4 |
| Lucan | 33 | 4 |
| Dawn | 2 | 3 |
| Chatham | 9 | 3 |
| Chatham | 49 | 2 |
| Blenheim | 61 | 2 |
| Chatham | 44 | 2 |
| Okanagan | 48 | 1 |
| London | 11 | 1 |
| Fort William | 21 | 1 |
| Dover | 2 | 1 |
| Chatham | 51 | 1 |
| Chatham | 45 | 1 |
| Athol | 6 | 1 |