| Locality | Post Code |
|---|---|
| Ailsa Craig, Middlesex | N0M |
| Appin, Middlesex | N0L 1A0 |
| Arva, Middlesex | N0M |
| Delaware, Middlesex | N0L |
| Denfield, Middlesex | N0M 1P0 |
| Dorchester, Middlesex | N0L |
| Falconbridge, Middlesex | P0M |
| Glencoe, Middlesex | N0L |
| Granton, Middlesex | N0M |
| Harrietsville, Middlesex | N0L 1N0 |
| Ilderton, Middlesex | N0M |
| Kerwood, Middlesex | N0M |
| Komoka, Middlesex | N0L |
| London, Middlesex | N5V, N5W, N5X, N5Y, N5Z, … |
| Lucan, Middlesex | N0M |
| Melbourne, Middlesex | N0L 1T0 |
| Mossley, Middlesex | N0L 1V0 |
| Mount Brydges, Middlesex | N0L |
| Muncey, Middlesex | N0L 1Y0 |
| Newbury, Middlesex | N0L |
| Parkhill, Middlesex | N0M |
| Putnam, Middlesex | N0L 2B0 |
| Sharon, Middlesex | L0G |
| Strathroy, Middlesex | N7G |
| Thorndale, Middlesex | N0M |
| Wardsville, Middlesex | N0L |