Barnwell County, South Carolina ZIP Codes

4 ZIP Codes

Zip Code
City
Population ↓
29812Barnwell11,132
29853Williston5,944
29817Blackville4,139
29826Elko241

Overview of ZIP Codes in Barnwell County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
4
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 4 ZCTAs in Barnwell County, South Carolina (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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