| Locality | Post Code |
|---|---|
| Agard Lands, Castries | LC03 101 |
| Babonneau, Castries | LC02 101 |
| Bagatelle, Castries | LC05 207 |
| Balata, Castries | LC02 201 |
| Barnard Hill, Castries | LC04 205 |
| Barre St Joseph, Castries | LC07 105 |
| Belair, Castries | LC07 204 |
| Bexon, Castries | LC06 201 |
| Bisee, Castries | LC02 502 |
| Bishop's Gap, Castries | LC05 204 |
| Bocage, Castries | LC05 101 |
| Bois Patat, Castries | LC04 102 |
| Cabiche, Castries | LC02 202 |
| Cacoa Girard, Castries | LC05 104 |
| Carellie, Castries | LC03 204 |
| Castries City, Castries | LC04 302 |
| Cedars, Castries | LC04 115 |
| Chabotsunbilt, Castries | LC04 114 |
| Chase Gardens, Castries | LC03 205 |
| Chassin, Castries | LC02 402 |
| Chaussee Road, Castries | LC04 101 |
| Choc, Castries | LC02 503 |
| Ciceron, Castries | LC06 104 |
| City Gate, Castries | LC03 202 |
| Conway, Castries | LC04 201 |
| Coubaril, Castries | LC06 105 |