Koorndijk is een straat te Tuitjenhorn in de gemeente Schagen en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1747 GC | 7, 9, 15, 19, 23, 25, 27, 29, 31a, 31, 33, 35, 37, 39a, 39, 41, 43, 45a, 45, 47A, 47, 49t, 49; |
| 1747 GD | 2, 4, 6, 8, 10, 14, 16a, 16b, 16, 18, 20, 24a, 24, 26, 28, 30, 32, 34, 36, 38, 66, 68, 70, 72, 74, 76, 78, 80, 82t, 82, 84a, 84; |