Bastion is een straat te Hoorn in de gemeente Hoorn en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1628 KV | 26, 27, 28, 29, 30, 31, 25, 24, 23, 22, 21, 20, 19, 18, 17; |
| 1628 KT | 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 1; |