County · GEOID 45011
Barnwell County, SC ZIP codes
7 ZIP/ZCTAs intersecting this county.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: County Barnwell County (GEOID 45011). Methodology
Combined population of ZIP/ZCTAs intersecting this county: 22,956 (7 ZIPs).
Combined population of ZIP/ZCTAs intersecting this county. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census county ACS headline above. Methodology
ZIP/ZCTA overlap with Barnwell County
Population overlap
Share of each ZIP/ZCTA’s population located within Barnwell County, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- 2981299.8%
Directory county
- 2981795.0%
Directory county
- 29826100.0%
Directory county
- 2983612.1%
- 2984331.6%
- 2984910.8%
- 2985380.7%
Directory county
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting Barnwell County
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 29812 | Barnwell | Barnwell County | 10,965 | $44,494 |
| 29817 | Blackville | Barnwell County | 4,230 | $47,260 |
| 29826 | Elko | Barnwell County | 194 | — |
| 29836 | Martin | Allendale County | 331 | $26,375 |
| 29843 | Olar | Bamberg County | 1,056 | $36,042 |
| 29849 | Ulmer | Allendale County | 169 | $69,375 |
| 29853 | Williston | Barnwell County | 6,011 | $39,003 |
USPS associates these ZIPs with Barnwell County
These codes list Barnwell County as a primary or acceptable city. They are not used for the ACS headline.
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 29813 | Hilda | Barnwell County | 88 | — |