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zipcodes.pro — STATE/SC/COUNTY/BARNWELL

Barnwell County, SC ZIP codes

Barnwell County, SC has 5 ZIP codes, in 5 towns: 29812, 29853, 29817, 29813 and 29826.

The county seat is Barnwell.

ZIP codes
5
Towns
5
County seat
Barnwell
County FIPS
45011
Population
20,521
Median household income
$46,626
Land area
548 sq mi

Barnwell County ZIP codes by town

Barnwell (county seat)
29812

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Barnwell County ZIP codes

2981229813298172982629853

The ZIP codes of Barnwell County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Barnwell County in numbers

About 20,521 people live in Barnwell County, in 8,116 households, the 39th most populous of South Carolina's 46 counties. The median household income is $46,626 a year, 33% below the South Carolina median of $69,324 (US: $80,734). The median owner-occupied home is valued at $106,000 (59% below the South Carolina median), and median gross rent is $740 a month. The median age is 40.4; 13.9% of adults 25 and over hold a bachelor's degree or higher (32.1% across South Carolina); the average commute takes 27 minutes.

Population20,521Barnwell20,521
Households8,116Barnwell8,116
Median age40.4Barnwell40.4South Carolina40.2US 38.9
Median household income$46,626Barnwell$46,626South Carolina$69,324US $80,734
Median home value$106,000Barnwell$106,000South Carolina$259,000US $332,700
Median gross rent$740Barnwell$740South Carolina$1,180US $1,413
Bachelor's degree or higher13.9%Barnwell13.9%South Carolina32.1%US 35.7%
Mean commute27.2 minBarnwell27.2 minSouth Carolina25.6 minUS 26.4 min
Population density37 / sq miBarnwell37 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Barnwell County

Largest towns in Barnwell County
TownZIP codesPopulation
Barnwell 1 4,613
Williston 1 2,870
Blackville 1 1,778
Hilda 1 468
Elko 1 296

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Barnwell County.

Not sure you are in Barnwell County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Barnwell County, with figures

ZIP codes in Barnwell County
ZIP City Type Population Median income Median home
29812 Barnwell , SC Standard 11,132 $51,870 $112,900
29813 Hilda , SC No street area — — —
29817 Blackville , SC Standard 4,139 $41,579 $84,300
29826 Elko , SC Standard 241 — $78,600
29853 Williston , SC Standard 5,944 $44,983 $107,100

Cite this page

zipcodes.pro. “Barnwell County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/sc/county/barnwell

Underlying data is public domain or openly licensed — sources, vintages and licences.