| Northumberland | |
|---|---|
| State | Ontario |
| HASC | CA.ON.NU |
| Places number | 20 |
| Name | Postal Code |
|---|---|
| Baltimore | K0K |
| Bewdley | K0L |
| Brighton | K0K |
| Campbellcroft | L0A |
| Campbellford | K0L |
| Castleton | K0K |
| Cobourg | K9A |
| Codrington | K0K |
| Colborne | K0K |
| Gores Landing | K0K |
| Grafton | K0K |
| Hamilton Township | K0L |
| Harwood | K0K |
| Hastings | K0L |
| Port Hope | L1A |
| Roseneath | K0K |
| Warkworth | K0K |
| Name | County | Postal Code |
|---|---|---|
| Dorset Street East, Northumberland, 35 | Port Hope | L1A 1E3 |
| Burnham Manor Court, Northumberland, 35 | Cobourg | K9A 5C2 |
| Colton Street, Northumberland, 35 | Colborne | K0K 1S0 |
| Bagot Street, Northumberland, 35 | Cobourg | K9A 3G1 |
| Pinewood School Road, Northumberland, 35 | Castleton | K0K 1M0 |
| Westwood Crescent, Northumberland, 35 | Cobourg | K9A 5B6 |
| Division Street, Northumberland, 35 | Cobourg | K9A 5J5 |
| Parkview Hills Drive, Northumberland, 35 | Cobourg | K9A 5S2 |
| Coverdale Avenue, Northumberland, 35 | Cobourg | K9A 4H2 |
| 7th Line, Northumberland, 35 | Port Hope | L1A 3V5 |