ZIP codes in Sumter County
16 ZIPs touch Sumter County, South Carolina. The blue dashed line is the county border; orange ZIPs reach into it.
16
ZIP codes
10
cross the county line
116,539
people in these ZIPs
46
counties in SC
Most people
Sumter County ZIP list
More counties in South Carolina
- Oconee County15
- Orangeburg County25
- Pickens County18
- Richland County47
- Saluda County12
- Spartanburg County40
- Union County9
- Williamsburg County12
- York County20
Questions people actually ask
How many ZIP codes are in Sumter County, South Carolina?
16 ZIP codes reach into Sumter County, including 1 PO Box or single-address ZIPs placed by the town they serve. 10 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Sumter County has the most people?
29150 (Sumter) has about 38,538 residents, the most of any ZIP touching Sumter County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Sumter 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 Sumter 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