Residential delivery area · South Carolina
ZIP Code 29812: Barnwell, SC
ZIP code 29812 uses the postal name Barnwell, South Carolina and lies mostly in Barnwell County (98% of its land) with the rest in Allendale County (Census 2020 ZIP-county file). About 11,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $51,870 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Barnwell (5%), Snelling (2%), Kline (2%) and Hilda (2%); 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Barnwell · its only residential ZIP
- County
- Barnwell County (98%); Allendale County (2%)
- Census places
- Barnwell (5%); Snelling (2%); Kline (2%); Hilda (2%)
- House districts
- SC-2 (98%), SC-6 (2%) 119th Congress, by share of land
- State
- South Carolina
- Time zone
- Eastern
- Land area
- 173.5 sq mi · 64 people per sq mi
Where is ZIP code 29812?
29812 centers on 33.214°, -81.383° and covers 173.5 square miles of land plus 1.7 of water. It borders 7 ZIP codes: 29836, 29849, 29843, 29817, 29853, 29042, 29810.
The map draws ZIP code areas only. For the streets inside 29812, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 29812 compare with the rest of Barnwell County?
| Measure | 29812 | In Barnwell County | In SC |
|---|---|---|---|
| People (ACS 2020-2024) | 11,132 | 1st of 7 | 156th of 424 |
| Median household income | $52k | 1st of 3 | 193rd of 265 |
| Median home value | $113k | 1st of 3 | 225th of 260 |
Its median household income is higher than in 17% of U.S. residential ZIP codes, and it is denser than 46% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 29812?
The 2020 Census counted 11,107 people in 29812; the ACS, which samples households over 2020-2024, estimates 11,132. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 11,132
- 2020 Census count
- 11,107
- Households
- 4,244
- Median age
- 38.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 29812?
Of the 11,132 people the ACS estimates in 29812, 24.3% are under 18 and 17.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (57.1%), then Black (not Hispanic) (35.7%).
- Under 1824.3%
- 18 to 6458.3%
- 65 and older17.4%
- White, not Hispanic57.1%
- Black, not Hispanic35.7%
- Hispanic or Latino3.5%
- Other or two or more2.9%
- Asian, not Hispanic0.9%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 29812 earn?
Median household income is $51,870 (ACS 2020-2024), the highest of the 3 ranked ZIP codes in Barnwell County.
- Median household income
- $51,870±$6,494
- Income per person
- $29,275
- Below the poverty line
- 23.8%
- Unemployed (of the labor force)
- 7.3%
- Adults 25+ with a bachelor's degree
- 15.3%
- Adjusted gross income per tax return, 2022
- $52,9474,610 returns; wages 74% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 29812?
FHFA's house price index for 29812, built from repeat sales and appraisals of the same homes, rose 86% from 2015 to 2025 and rose 62% from 2020 to 2025, and moved +18.0% in 2025.
- Median home value (owners' estimate)
- $112,900
- Median gross rent
- $717
- Homes owned by their occupants
- 76.4%
- Housing units
- 5,141
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 29812?
223 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade45
- Other services (except public administration)34
- Professional, scientific, and technical services23
- Accommodation and food services23
- Finance and insurance18
- Health care and social assistance18
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 29812?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 29836 | Martin | 326 | – | 11.1 mi |
| 29849 | Ulmer | 271 | $90k | 11.4 mi |
| 29843 | Olar | 934 | $36k | 12.0 mi |
| 29817 | Blackville | 4,139 | $42k | 12.5 mi |
| 29853 | Williston | 5,944 | $45k | 13.1 mi |
| 29042 | Denmark | 4,904 | $41k | 15.0 mi |
| 29810 | Allendale | 3,775 | $27k | 15.8 mi |
| 29826 | Elko | 241 | – | 11.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.