Westerhaven is een straat te Medemblik in de gemeente Medemblik en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1671 CH | 19, 20, 18, 17, 16, 15, 15B, 15A, 14, 13, 12, 11, 10, 9, 8, 8A, 7, 6, 5, 4, 3, 2, 2B, 2A, 1, 1; |
| 1671 CJ | 21, 22, 23, 24, 25A, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38; |