| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Eastwood | SS9 |
| Postal/ZIP Codes in Leigh-on-Sea | SS9 |
| Postal/ZIP Codes in Shoeburyness | SS3 |
| Postal/ZIP Codes in Southend-on-Sea | SS1, SS2 |
| Postal/ZIP Codes in Temple Farm Industrial Estate | SS2 |
| Postal/ZIP Codes in Westcliff-on-Sea | SS0 |