Houwer is een straat te Landgraaf in de gemeente Landgraaf en is gelegen in de Nederlandse provincie Limburg.
| Postcode | Huisnummers |
|---|---|
| 6372 NN | 7, 9, 5, 3, 1, 11, 13, 15, 17, 19, 21, 23, 25, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63; |
| 6372 NM | 42, 40, 38, 36, 34, 32, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2; |