| Subdistrict | Enum. district | # of links |
| Petrolia | 53 | 91 |
| Petrolia | 55 | 19 |
| Petrolia | 56 | 6 |
| Petrolia | 57 | 4 |
| Sarnia | 51 | 4 |
| Enniskillen | 30 | 4 |
| Petrolia | 52 | 3 |
| Petrolia | 54 | 3 |
| Forest | 49 | 2 |
| London | 5 | 2 |
| Enniskillen | 32 | 2 |
| Virden | 24 | 1 |
| Watford | 67 | 1 |
| Township 7 in range 22 west of the 1st M | 11 | 1 |
| London Township | 11 | 1 |
| Caradoc | 2 | 1 |