Gaastmeer is een straat te Zaandam in de gemeente Zaanstad en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1509 HE | 25, 26, 27, 28, 29a, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 24, 23, 22, 21; |
| 1509 HD | 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1; |