| Subdistrict | Enum. district | # of links |
| Dawn | 5 | 118 |
| Dawn | 2 | 12 |
| Sarnia | 44 | 10 |
| Oil Springs | 64 | 8 |
| Winnipeg | 69 | 7 |
| Tilbury East | 37 | 7 |
| Dawn | 10 | 7 |
| Petrolia | 55 | 6 |
| London Township | 10 | 5 |
| Sombra | 43 | 5 |
| Dawn | 9 | 5 |
| Enniskillen | 21 | 5 |
| Petrolia | 56 | 5 |
| Sarnia | 29 | 4 |
| Dawn | 3 | 4 |
| Dawn | 6 | 4 |
| Chatham Township | 16 | 3 |
| Petrolia | 53 | 3 |
| Bracebridge | 19 | 3 |
| Sarnia | 51 | 3 |
| Moore | 16 | 3 |
| Stephen | 22 | 2 |
| Strathroy | 33 | 2 |
| Petrolia | 54 | 2 |
| Brooke | 10 | 1 |
| Enniskillen | 26 | 1 |
| Orford Township | 30 | 1 |
| Petrolia | 52 | 1 |
| Townships 18 | 19 | 1 |
| Greenwood riding | 59 | 1 |
| Forest | 51 | 1 |
| Sarnia | 34 | 1 |
| Westminster Township | 19 | 1 |
| Sarnia | 46 | 1 |
| Brooke | 8 | 1 |
| Dawn | 4 | 1 |
| Enniskillen | 28 | 1 |
| Sombra | 42 | 1 |