Grosthuizen is een straat te Avenhorn in de gemeente Koggenland en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1633 EL | 23, 25, 26, 28A, 28, 29, 30, 31A, 31, 32, 34, 35, 36, 37, 38A, 38, 22, 22A, 21, 21B; |
| 1633 EM | 39, 40A, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54A, 54, 55, 56, 58, 58, 58; |
| 1633 EK | 20, 19, 18, 18A, 17, 17A, 16, 15, 14, 13, 12, 11, 10, 9, 9A, 7, 6, 5, 2, 1; |
| 1633 EN | 59A, 59B, 59C, 59D, 59, 60, 61A, 61, 62A, 62, 63A, 63, 64, 65, 66, 67, 68, 69; |
| 1633 EP | 71, 72, 73, 74, 75, 76A, 76, 77, 78, 79, 80A, 80, 81A, 81, 82, 83A, 83B, 83, 84A, 84, 85, 86, 87A, 87B, 87, 88; |
| 1633 ER | 89A, 89, 90, 91, 92, 93, 94A, 94, 95, 96, 97, 99, 100, 101A, 101, 102, 103A, 103, 104A, 104, 105, 106; |
| 1633 ES | 107, 110, 111, 113, 114, 115A, 115, 116, 117, 118, 119, 120, 121A, 122, 123, 124, 125, 127, 128, 129, 130, 131, 133; |