ZIP codes in Dorchester County
18 ZIPs touch Dorchester County, South Carolina. The blue dashed line is the county border; orange ZIPs reach into it.
18
ZIP codes
13
cross the county line
292,275
people in these ZIPs
46
counties in SC
Most people
Dorchester County ZIP list
More counties in South Carolina
- Chester County11
- Chesterfield County11
- Clarendon County13
- Colleton County15
- Darlington County11
- Dillon County11
- Edgefield County10
- Fairfield County10
- Florence County15
- Georgetown County6
- Greenville County38
- Greenwood County12
Questions people actually ask
How many ZIP codes are in Dorchester County, South Carolina?
18 ZIP codes reach into Dorchester County, including 3 PO Box or single-address ZIPs placed by the town they serve. 13 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Dorchester County has the most people?
29483 (Summerville) has about 59,186 residents, the most of any ZIP touching Dorchester County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Dorchester County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Dorchester County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from