Barnwell County, South Carolina ZIP Codes
- ZIP records
4 - Cities represented
4 - Sum of listed ZIP population estimates
21,456
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 29812 | Barnwell | 11,132 |
| 2 | 29853 | Williston | 5,944 |
| 3 | 29817 | Blackville | 4,139 |
| 4 | 29826 | Elko | 241 |
Cities in Barnwell County
ZIP Directory
Browse all ZIP data for South Carolina
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.