Willemstraat is een straat te Delft in de gemeente Delft en is gelegen in de Nederlandse provincie Zuid-Holland.
| Postcode | Huisnummers |
|---|---|
| 2613 DS | 73, 75, 73, 71, 69, 67, 65, 63, 61, 59, 57, 55, 53, 53B, 53A, 51, 49, 47, 45, 43, 41, 39, 37, 35, 33, 31; |
| 2613 DR | 3, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23A, 23B, 23; |
| 2613 DV | 36, 38, 40, 42, 44, 46A, 46B, 46C, 48, 50, 52, 54, 56, 58, 60, 62, 64; |
| 2613 DT | 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34; |