8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 29485 | Summerville | 58,946 |
| 29483 | Summerville | 56,758 |
| 29420 | North Charleston | 22,808 |
| 29472 | Ridgeville | 10,693 |
| 29477 | Saint George | 7,195 |
| 29448 | Harleyville | 2,506 |
| 29437 | Dorchester | 1,916 |
| 29471 | Reevesville | 1,044 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Dorchester County, South Carolina (US Census).