Zandblauwtje is een straat te Katwijk in de gemeente Katwijk en is gelegen in de Nederlandse provincie Zuid-Holland.
| Postcode | Huisnummers |
|---|---|
| 2224 DZ | 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 5, 3, 1, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47; |
| 2224 DJ | 42, 40, 38, 36, 34, 32, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2; |