Graalstraat is een straat te Alkmaar in de gemeente Alkmaar en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1813 EN | 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 51, 49, 47, 45, 43, 41, 39, 37, 35, 33, 31, 29, 27, 25, 23, 21; |
| 1813 EP | 18, 20, 22, 24, 16, 14, 12, 10, 8, 6, 4, 2; |
| 1813 ER | 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64; |
| 1813 ES | 66, 68, 70, 72, 74, 76, 78, 90, 92, 94, 96, 98, 100, 102, 104, 80, 82, 84, 86, 88; |
| 1813 ET | 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146; |