| Locality | Post Code |
|---|---|
| Apsley, Peterborough | K0L |
| Asphodel-Norwood, Peterborough | K0L |
| Bailieboro, Peterborough | K0L |
| Bethany, Peterborough | L0A 1A0 |
| Bridgenorth, Peterborough | K0L |
| Buckhorn, Peterborough | K0L |
| Cavan, Peterborough | L0A 1C0 |
| Cavan Monaghan, Peterborough | K9J |
| Curve Lake, Peterborough | K0L 0A6, K0L 1R0 |
| Douro-Dummer, Peterborough | K0L, K9J |
| Ennismore, Peterborough | K0L |
| Fraserville, Peterborough | K0L |
| Havelock, Peterborough | K0L |
| Hbmtwp, Peterborough | K0L 2H0 |
| Hiawatha, Peterborough | K9J 0E6 |
| Indian River, Peterborough | K0L |
| Juniper Island, Peterborough | K0L 2C0 |
| Keene, Peterborough | K0L, K9J |
| Lakefield, Peterborough | K0L |
| Lakehurst, Peterborough | K0L |
| Millbrook, Peterborough | L0A |
| North Kawartha, Peterborough | K0L |
| Norwood, Peterborough | K0L |
| Otonabee, Peterborough | K0L, K9J, K9L |
| Peterborough, Peterborough | K9H, K9J, K9K, K9L |
| Selwyn, Peterborough | K0L, K9J |