Helmlaan is een straat te Haarlem in de gemeente Haarlem en is gelegen in de Nederlandse provincie Noord-Holland.
| Postcode | Huisnummers |
|---|---|
| 2015 LD | 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 55, 53, 51, 49, 47, 45, 43, 41, 39, 37, 35, 33, 31; |
| 2015 LE | 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40; |
| 2015 LG | 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70; |
| 2015 LC | 29, 27, 25, 23, 21, 19, 15, 11, 9, 7, 5; |