Westerstraat is een straat te Wormerveer in de gemeente Zaanstad en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1521 ZA | 25a, 25b, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61; |
| 1521 ZB | 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109; |
| 1521 ZC | 96, 98, 100, 102, 104, 106, 108A, 108B, 108C, 108, 110, 112, 114, 116, 118, 120, 122, 124, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147; |
| 1521 ZD | 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30; |
| 1521 ZE | 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78; |