| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in De Lier, Westland | 2678 |
| Postal/ZIP Codes in Honselersdijk, Westland | 2675 |
| Postal/ZIP Codes in Kwintsheul, Westland | 2295 |
| Postal/ZIP Codes in Maasdijk, Westland | 2676 |
| Postal/ZIP Codes in Monster, Westland | 2681 |
| Postal/ZIP Codes in Naaldwijk, Westland | 2671, 2672, 2673 |
| Postal/ZIP Codes in Poeldijk, Westland | 2685 |
| Postal/ZIP Codes in 's-Gravenzande, Westland | 2691, 2692, 2693, 2694 |
| Postal/ZIP Codes in Ter Heijde, Westland | 2684 |
| Postal/ZIP Codes in Wateringen, Westland | 2291, 2292 |