Johannes Poststraat is een straat te Hoorn in de gemeente Hoorn en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 1624 CB | 49, 51, 53, 55, 57, 59, 61A, 61, 63A, 63, 65A, 65, 67A, 67, 69, 71, 47, 45; |
| 1624 CC | 2A, 2B, 2C, 2D, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24A, 24B, 24, 26, 28A, 28B, 28C, 28D, 28E, 28F, 28; |
| 1624 CA | 43, 41, 39, 37, 35, 33, 31, 29, 27, 25, 23, 21, 19, 17, 15, 13, 11, 9, 7, 5, 3, 1; |
| 1624 CD | 34A, 34, 36A, 40A, 40B, 40C, 40, 46, 48A, 50A, 52, 54A, 54, 56A, 56, 58A, 58, 60A, 60; |