There are 8 zip codes in Dorchester County, South Carolina. The most populated is 29485, located in Summerville. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
2948558,946Summerville
2948356,758Summerville
2942022,808North Charleston
2947210,693Ridgeville
294777,195Saint George
294482,506Harleyville
294371,916Dorchester
294711,044Reevesville

Zip Codes in Dorchester County, South Carolina by Population (2024)