| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Adams Run, Dorchester | 29426 |
| Postal/ZIP Codes in Charleston, Dorchester | 29409, 29424, 29425 |
| Postal/ZIP Codes in Dorchester, Dorchester | 29437 |
| Postal/ZIP Codes in Grover, Dorchester | 29447 |
| Postal/ZIP Codes in Harleyville, Dorchester | 29448 |
| Postal/ZIP Codes in Knightsville, Dorchester | 29483 |
| Postal/ZIP Codes in Ladson, Dorchester | 29485 |
| Postal/ZIP Codes in North Charleston, Dorchester | 29420 |
| Postal/ZIP Codes in Reevesville, Dorchester | 29471 |
| Postal/ZIP Codes in Ridgeville, Dorchester | 29472 |
| Postal/ZIP Codes in Saint George, Dorchester | 29477 |
| Postal/ZIP Codes in Summerville, Dorchester | 29483, 29485, 29486 |