| Subdistrict | Enum. district | # of links |
| Dawn | 3 | 132 |
| Dawn | 2 | 7 |
| Camden Township | 3 | 7 |
| Townships 25 | 73 | 6 |
| London | 8 | 4 |
| Dawn | 5 | 4 |
| Dawn | 11 | 4 |
| Dover | 8 | 4 |
| Camden Township | 2 | 4 |
| Dresden | 40 | 3 |
| Dawn | 7 | 3 |
| Strathroy | 33 | 3 |
| Oil Springs | 65 | 3 |
| Dresden | 38 | 3 |
| Townsend | 17 | 2 |
| Strathroy | 30 | 2 |
| Windsor | 38 | 2 |
| Euphemia | 37 | 2 |
| Springfield | 29 | 2 |
| Westminster Township | 19 | 2 |
| Chatham | 17 | 1 |
| Townships 19 | 24 | 1 |
| Dresden | 39 | 1 |
| Wallaceburg | 45 | 1 |
| Townships 9 | 40 | 1 |
| Sarnia | 30 | 1 |
| Petrolia | 55 | 1 |
| Toronto | 39 | 1 |
| Township 53 in range 22 west of the 5th M | 36 | 1 |
| Alberni | 2 | 1 |
| Euphemia | 40 | 1 |