| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Quatre Chemins, Castries | LC06 403 |
| Postal/ZIP Codes in Ravine Chabot, Castries | LC05 102 |
| Postal/ZIP Codes in Ravine Poisson, Castries | LC06 203 |
| Postal/ZIP Codes in Roadderriere Fort, Castries | LC06 103 |
| Postal/ZIP Codes in Roadtapion, Castries | LC04 304 |
| Postal/ZIP Codes in Rock Hall, Castries | LC05 202 |
| Postal/ZIP Codes in Rose Hill, Castries | LC04 103 |
| Postal/ZIP Codes in Sans Souci, Castries | LC04 203 |
| Postal/ZIP Codes in Sarot, Castries | LC08 503 |
| Postal/ZIP Codes in Summersdale, Castries | LC02 504 |
| Postal/ZIP Codes in Sunny Acres, Castries | LC02 505 |
| Postal/ZIP Codes in Talvern, Castries | LC02 403 |
| Postal/ZIP Codes in Ti Chemin, Castries | LC02 404 |
| Postal/ZIP Codes in Ti Rocher, Castries | LC06 401 |
| Postal/ZIP Codes in Trois Piton, Castries | LC06 404 |
| Postal/ZIP Codes in Vide Bouteille, Castries | LC02 506 |
| Postal/ZIP Codes in Vigie, Castries | LC04 204 |
| Postal/ZIP Codes in Water Works Road, Castries | LC04 116 |