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
City
Population
29485Summerville58,946
29483Summerville56,758
29420North Charleston22,808
29472Ridgeville10,693
29477Saint George7,195
29448Harleyville2,506
29437Dorchester1,916
29471Reevesville1,044

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