29812 ZIP Code — Barnwell, SC

Barnwell County, South Carolina

ZIP code 29812 is located in Barnwell, South Carolina, within Barnwell County. It covers approximately 173.48 square miles and serves a population of 10,773 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 803.

About ZIP code 29812

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $98,400. Owner-occupancy sits near the national average at 74%.

Median household income is $42,038. Poverty affects 29% of residents, above the national average. SNAP benefit usage at 25% of households reflects economic stress in the area. 37% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 30 minutes is near the national average.

College attainment at 18% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (23%) compared to national benchmarks.

Overall, ZIP code 29812 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, a significant Social Security-dependent population, and elevated reliance on food assistance.

10,773

population

173.48

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

29812 ZIP code map

Cities in ZIP code 29812

Below are the cities the US Postal Service accepts for ZIP code 29812. Using any city not on this list may result in mail delivery delays.

City	Status
Barnwell	Acceptable
Barnwell	Preferred

Nearby ZIP codes

29843 Olar (10.7 mi) 29817 Blackville (10.9 mi) 29849 Ulmer (13.1 mi) 29042 Denmark (13.7 mi) 29853 Williston (13.8 mi) 29810 Allendale (14.5 mi) 29836 Martin (15 mi) 29808 Aiken (15.6 mi) 29113 Norway (19.2 mi) 29081 Ehrhardt (20 mi)

Demographics updated 05/2026

Population
Total population	10,773
Population density	62 / sq mi
State FIPS	45
County FIPS	011

Geography
Land area	173.48 sq mi
Water area	1.74 sq mi
Latitude	33.2124
Longitude	-81.3468
Timezone	Eastern (ET)
Area code	803

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	55.4%	58.0%	45.8%
$50k – $100k	28.5%	29.1%	30.5%
$100k – $200k	13.1%	11.2%	18.6%
Over $200k	3.0%	1.7%	5.1%

Demographics & statistics

10,773

Population

People per sq mi

39.7

Median age

$42,038

Median household income

$25,711

Per capita income

$98,400

Median home value

$686

Median monthly rent

74.4%

Home ownership

29.0%

Poverty rate

6.0%

Unemployment

3,897

Housing units

17.5%

Bachelor's or higher

Age distribution

Male Female

458

Under 5

466

361

5–9

368

359

10–14

366

358

15–19

364

398

20–24

404

566

25–34

575

516

35–44

525

642

45–54

653

332

55–59

337

356

60–64

362

634

65–74

645

255

75–84

260

106

85+

107

← Male

Female →

Age summary

Group	Count	%
Under 18	2,761	25.6%
18 and over	8,012	74.4%
65 and over	2,007	18.6%
Median age	39.7 years

Race & ethnicity

White 54.1%

Black or African American 40%

Two or more races 2.3%

Hispanic or Latino 1.6%

Other race 1.4%

Asian 0.4%

American Indian / Alaska Native 0.2%

Group	Count	%
White	5,922	54.1%
Black or African American	4,378	40%
Two or more races	256	2.3%
Hispanic or Latino	179	1.6%
Other race	151	1.4%
Asian	45	0.4%
American Indian / Alaska Native	21	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	55.4%	58.0%	45.8%
$50k – $100k	28.5%	29.1%	30.5%
$100k – $200k	13.1%	11.2%	18.6%
Over $200k	3.0%	1.7%	5.1%

Under $10k 13.0%

$10k–$15k 10.5%

$15k–$25k 7.3%

$25k–$35k 12.6%

$35k–$50k 11.7%

$50k–$75k 10.7%

$75k–$100k 15.5%

$100k–$150k 11.2%

$150k–$200k 3.8%

$200k+ 3.7%

Range	% of households
Under $10k	13.0%
$10k–$15k	10.5%
$15k–$25k	7.3%
$25k–$35k	12.6%
$35k–$50k	11.7%
$50k–$75k	10.7%
$75k–$100k	15.5%
$100k–$150k	11.2%
$150k–$200k	3.8%
$200k+	3.7%
Median income	$42,038

Housing

Home values

Under $50k 23.3%

$50k–$100k 27.8%

$100k–$150k 11.5%

$150k–$200k 14.9%

$200k–$300k 13.7%

$300k–$500k 8.2%

$500k–$1M 0.3%

$1M+ 0.3%

Housing overview

Metric	Value
Median home value	$98,400
Median rent / month	$686
Owner occupied	74.4%
Renter occupied	25.6%
Vacant	14.9%
Single-family detached	61.1%
Large apartment buildings	2.1%
Mobile homes	26.3%
Median rooms	5.6
Avg household size (owned)	2.43

Year built

Era	%
2020 or later	0.3%
2010–2019	4.0%
2000–2009	7.4%
1990–1999	18.3%
1980–1989	23.7%
1970–1979	14.6%
1960–1969	9.0%
1950–1959	12.4%
1940–1949	1.3%
1939 or earlier	8.9%

Bedrooms

Size	% of units
No bedroom (studio)	2.3%
1 bedroom	5.3%
2 bedrooms	22.4%
3 bedrooms	53.4%
4 bedrooms	15.2%
5+ bedrooms	1.3%

Vehicles per household

Vehicles	% of households
No vehicle	12.2%
1 vehicle	34.6%
2 vehicles	29.8%
3 or more	23.5%

Heating fuel

Fuel type	%
Utility gas	9.9%
Electricity	78.4%
Propane / LP gas	10.9%
Wood	0.7%
No fuel used	0.1%

Households & families

Household type	Count	%
Married-couple family	1,612	38.0%
Cohabiting couple	147	3.5%
Male householder, no spouse	736	17.4%
Female householder, no spouse	1,747	41.2%
Households with children under 18	1,053	24.8%
Households with seniors (65+)	1,397	32.9%
Average household size	2.49

Marital status

Status	Male	Female
Never married	40.1%	33.3%
Married	43.3%	38.6%
Separated	3.4%	3.3%
Widowed	3.6%	14.3%
Divorced	9.6%	10.5%

Education

Less than 9th grade 7.2%

Some HS, no diploma 10.9%

HS graduate 35.6%

Some college, no degree 16.1%

Associate's degree 12.6%

Bachelor's degree 9.5%

Graduate / professional 8.0%

Metric	%
HS diploma or higher	81.8%
Bachelor's or higher	17.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	356	13.2%
Kindergarten	78	2.9%
Elementary school	1,156	42.8%
High school	671	24.8%
College / grad school	443	16.4%

Employment

Industry of employment

Education & healthcare 25.5%

Manufacturing 15.0%

Arts, food & hospitality 12.3%

Professional & management 11.6%

Transportation & utilities 8.8%

Retail trade 8.5%

Public administration 3.9%

Construction 3.8%

Agriculture & mining 3.0%

Other services 2.8%

Information 2.6%

Finance & real estate 1.6%

Wholesale trade 0.5%

Occupation

Category	%
Management, business & arts	29.1%
Service	23.7%
Sales & office	14.8%
Natural resources & construction	10.7%
Production & transportation	21.7%

Employment type

Type	%
Private sector	78.3%
Government	18.3%
Self-employed	2.9%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	82.5%
Carpool	11.2%
Public transit	1.4%
Walk	0.6%
Work from home	3.3%
Other means	1.0%
Avg commute (minutes)	29.5

Poverty

All people 29.0%

Under 18 years 50.9%

18 and over 21.3%

Married-couple families 2.9%

Female-led households 54.9%

Income support

Source	% of households
Social Security	37.4%
Retirement income	30.3%
Supplemental Security	7.6%
Cash public assistance	3.7%
Food stamps / SNAP	24.6%

Health indicators

Condition	%
Obesity	38.4%
High blood pressure	42.7%
High cholesterol	37.6%
Diabetes	14.0%
Heart disease	7.4%
Stroke	4.3%
Asthma	11.0%
Arthritis	30.6%
Kidney disease	3.6%
Pulmonary disease	8.9%
Cancer	6.3%

Behavior / access	%
Smoking	22.5%
Binge drinking	16.2%
No physical activity	31.5%
Less than 7 hrs sleep	38.1%
Depression	22.7%
Fair or poor health	20.0%
Poor mental health	16.3%
Poor physical health	13.4%
No health insurance	19.4%
Visited doctor (checkup)	79.5%
Visited dentist	60.1%
Cholesterol screening	88.7%
Teeth loss	20.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	574	7.2%

Disability	%
Any disability	18.9%
Under 18	2.2%
18–64 years	17.4%
65 and over	47.2%

Health insurance coverage

Type	%
Private insurance	55.8%
Public insurance	49.1%
No insurance	8.7%
Uninsured under 19	1.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	9,849	91.4%
Spanish	64	0.6%
Other Indo-European	11	0.1%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	10,372	96.3%
Born in same state	10,358	96.1%
Born in different state	7,133	66.2%
Foreign born	14	0.1%
Naturalized citizen	401	3.7%
Not a US citizen	122	30.4%

Ancestry

Ancestry	Count	%
Arab	2,456	22.8%
French	450	4.2%
Italian	150	1.4%

Ancestry	Count	%
Irish	9	0.1%
English	6	0.1%

Technology access

Metric	% of households
Computer access	39.4%
Internet access	83.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 29812

What city is ZIP code 29812 in?

ZIP code 29812 is primarily assigned to Barnwell, South Carolina.

What county is ZIP code 29812 in?

ZIP code 29812 falls within Barnwell County, South Carolina.

What is the poverty rate in ZIP code 29812?

29% of residents in ZIP code 29812 live below the poverty line, above the national average.

Does ZIP code 29812 have a large retiree population?

37% of households in ZIP code 29812 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 29812?

The median home value in ZIP code 29812 is $98,400.

What is the median household income in ZIP code 29812?

The median household income in ZIP code 29812 is $42,038, below the national median of ~$75,000.

What timezone is ZIP code 29812 in?

ZIP code 29812 observes the EST timezone.