Barnwell County, SC ZIP Codes
7 ZIP codes cover all or part of Barnwell County, South Carolina: 29812, 29853, 29817, 29843, 29836, 29849 and 29826. The Census Bureau counts 20,521 residents in the county, with a median household income of $46,626 and a median home value of $106,000. Median household income ranges from $41,579 in 29817 to $51,870 in 29812. Its largest communities include Barnwell, Williston, Blackville, Hilda and Elko.
Barnwell County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 20,521 |
| Households | 8,116 |
| Median household income | $46,626 |
| Median home value | $106,000 |
| Median age | 40.4 |
| Median rent | $740 |
All 7 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 22,987 |
| Households (sum of ZIP codes) | 9,110 |
| Median household income, range across ZIP codes | $41,579 (29817) to $51,870 (29812) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $47,782 |
| Homeowners | 72.7% |
| Households with kids under 18 | 27.8% |
| Moved in the past year | 7.8% |
| Carrier routes in EDDM2GO's route library | 23 routes, 10,536 homes (6 of 7 ZIP codes) |
Top facts
- Highest median household income in Barnwell County: 29812 ($51,870)
- Most residents: 29812 (11,132 people)
- Highest homeownership: 29812 (76.4% own their home)
- Most households with kids: 29817 (28.8% of households)
- Most new movers: 29817 (11.3% moved in last year)
- Youngest median age: 29812 (38.7 years)
- Highest median home value: 29812 ($112,900)
Every ZIP code in Barnwell County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 29812 | Barnwell | 11,132 | 4,244 | $51,870 | $112,900 | 76.4% | 28.3% | 6.7% | 10 | 5,243 | 98% of its land |
| 29853 | Williston | 5,944 | 2,485 | $44,983 | $107,100 | 67.5% | 25.8% | 6.6% | 6 | 3,018 | 75% of its land |
| 29817 | Blackville | 4,139 | 1,676 | $41,579 | $84,300 | 64.7% | 28.8% | 11.3% | 3 | 1,852 | 84% of its land |
| 29843 | Olar | 934 | 381 | $35,986 | $77,700 | 90.8% | 28.3% | 19.1% | 2 | 608 | 19% of its land |
| 29836 | Martin | 326 | 165 | — | $108,200 | 87.9% | 28.5% | 2.5% | 1 | 229 | 17% of its land |
| 29849 | Ulmer | 271 | 94 | $89,583 | $161,100 | 87.2% | 38.3% | 0.0% | 1 | 137 | 27% of its land |
| 29826 | Elko | 241 | 65 | — | $78,600 | 69.2% | 32.3% | 1.7% | — | — | 100% of its land |
A ZIP code is listed for Barnwell County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Barnwell — 4,613 residents · 1 ZIP code
- Williston — 2,870 residents · 1 ZIP code
- Blackville — 1,778 residents · 1 ZIP code
- Hilda — 468 residents · 1 ZIP code
- Elko — 296 residents · 2 ZIP codes
- Snelling — 219 residents · 1 ZIP code
- Kline — 154 residents · 1 ZIP code
Price a mailing to Barnwell County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Barnwell County, SC?
- 29812, 29853, 29817, 29843, 29836, 29849 and 29826. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Barnwell County?
- 20,521 residents in 8,116 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Barnwell County?
- $46,626 for the county as a whole. Its ZIP codes range from $41,579 (29817) to $51,870 (29812).
- Which Barnwell County ZIP code has the highest median household income?
- 29812, at $51,870, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Barnwell County?
- For the 6 of 7 ZIP codes in EDDM2GO's stored route library: 23 carrier routes reaching 10,536 residential and 551 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.