Willemstraat is een straat te Roosendaal in de gemeente Roosendaal en is gelegen in de Nederlandse provincie Noord-Brabant.
| Postcode | Huisnummers |
|---|---|
| 4701 HC | 20, 22a, 22b, 22c, 22, 24, 26, 28, 30, 20g, 20f, 20e, 20d, 20c, 20b, 20a, 18, 16, 14, 12, 10, 8, 4, 2a; |
| 4701 HD | 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68; |
| 4701 HB | 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53a, 53b, 53c, 53d, 53e, 53f, 53g, 53h, 53, 55, 57a, 57, 59, 61; |
| 4701 HA | 13, 11, 9b, 9a, 7, 5, 3, 3a, 1; |