Williston, SC

Town in Barnwell County, SC, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

2,870

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

40.4

years ∙ half population younger than 40.4, half older

Diversity Index

49.4%

chance two random people differ in race and ethnicity

Nativity

foreign-born population

100%Native

0% Foreign-born

Geographic Context

Location, size, and surroundings

About

Williston is a town within Barnwell County, South Carolina, United States.

Location

Town in Barnwell County, SC, US

Co-ordinates

DEC33.401663° N, 81.421899° W

DMS33° 24′ 05.99″ N, 81° 25′ 18.84″ W

Population Density & area

320.7/sq mi (123.8/km²)

Total Area

9.01 sq mi (23.35 km²)

Land Area

8.95 sq mi (23.19 km²) · 99.3%

Water Area

0.06 sq mi (0.16 km²) · 0.7%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

48% male

Male 48%

Female 52%

males per 100 females

Williston 92.5

Barnwell County 93.3

South Carolina 94.8

Nativity

foreign-born population

100%Native

0% Foreign-born

% Foreign-born

Williston 0%

Barnwell County 2.4%

South Carolina 5.8%

Age Distribution

How the population is spread across age groups

Median Age

40.4

years ∙ half population younger than 40.4, half older

Williston

40.4

Barnwell County

40.4

South Carolina

40.2

Dependency ratio

79.9

dependents per 100 working-age adults

Williston 79.9

Barnwell County 75

South Carolina 67.5

AGE DISTRIBUTION

Distribution of age group

Median age

	Williston	Barnwell County	South Carolina
Age Group
Children (Under 18)	25.9%	23.7%	21.4%
Working age (18-64)	55.5%	57.2%	59.7%
Senior (65+)	18.6%	19.1%	18.9%
Dependency ratio
Total dependency ratio	79.9	75	67.5
Child dependency ratio	46.5	41.5	35.9
Old-age dependency ratio	33.4	33.5	31.6

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

40.4%

Black

58.5%

Asian

Hispanic

0.2%

Other

0.9%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

49.4%

chance two random people differ in race and ethnicity

Williston 49.4%

Barnwell County 56%

South Carolina 54.9%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Williston population

	Williston	Barnwell County	South Carolina
Hispanic or Latino	0.2%	2.9%	7.4%
Mexican	0%	1.7%	3.4%
Puerto Rican	0.2%	0.1%	1%
Cuban	0%	0%	0.3%
Other Hispanic / Latino	0%	1.1%	2.7%
Not Hispanic or Latino	99.8%	97.1%	92.6%
One race	98.9%	94.4%	88.9%
White	40.4%	50.5%	61.9%
Black or African American	58.5%	42.8%	24.6%
American Indian and Alaska Native	0%	0.1%	0.2%
Asian	0%	0.6%	1.7%
Native Hawaiian and Other Pacific Islander	0%	0%	0%
Some Other Race	0%	0.4%	0.5%
Two or more races (Multiracial)	0.9%	2.7%	3.7%

Household & Families Composition

Household size, type, and family structure

Household structure

52.8% family

Family 52.8%

Non family 47.2%

% family households

Williston 52.8%

Barnwell County 63.1%

South Carolina 65%

Average household size

2.27

persons per household

Williston

2.27

Barnwell County

2.48

South Carolina

2.44

Household & Family COMPOSITION

Households

Percentage of Williston population

	Williston	Barnwell County	South Carolina
Total households	1,227	8,116	2,117,989
Average houshold size	2.27	2.48	2.44
Family households	648	5,119	1,377,369
Average family size	3.23	3.19	3.01
Married couple family	192	3,029	998,170
Other families	456	2,090	379,199
Male householder	61	337	95,077
Female householder	395	1,753	284,122
Non-family households	579	2,997	740,620
One-person households	549	2,801	618,603
Male householder	249	1,247	273,409
Senior (65+) living alone	48	505	86,486
Female householder	300	1,554	345,194
Senior (65+) living alone	165	904	172,484
Other living arrangements	30	196	122,017

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

1,416

housing units

Williston 1,416

Barnwell County 9,927

South Carolina 2,443,039

Occupancy status

86.7% occupied

Occupied 86.7%

Vacant 13.3%

vacancy rate

Williston 13.3%

Barnwell County 18.2%

South Carolina 13.3%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

52.6%

Single family houses

52.6%

Apartments in multi-unit structures

21.4%

Mobile homes

26.1%

Boat, RV, van, etc

Median Year Built

1982

Half of houses were built before 1982, and half after.

Historic ∙ 1939 or earlier

6.4%

Postwar & mid-century ∙ 1940 - 1969

28.7%

Late 20th century ∙ 1970 - 1999

49%

Modern ∙ 2000 or later

15.9%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Williston	Barnwell County	South Carolina
Rooms per unit
Median rooms	5.5	5.7	5.7
1–3 rooms	10.9%	8.9%	9.1%
4–6 rooms	59.9%	57.5%	55.3%
7+ rooms	29.3%	33.5%	35.5%
Bedrooms
No bedroom / studio	2.5%	0.8%	1.5%
1 bedroom	6.7%	7.6%	5.7%
2 bedrooms	30.8%	24%	22.5%
3 bedrooms	48.3%	47.6%	47.5%
4+ bedrooms	11.7%	20%	22.8%
At a glance
Median year built	1982	1983	1993
Total housing units	1,416	9,927	2,443,039

Occupancy Profile

Who is inside and how they use it

Homeownership

54.6% owners

Renter-occupied 45.4%

Owner-occupied 54.6%

homeownership rate

Williston 54.6%

Barnwell County 70.9%

South Carolina 71.9%

Average household size

2.4

Owner-occupied

2.12

Renter-occupied

owner-occupied average size

Williston 2.4

Barnwell County 2.49

South Carolina 2.49

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Williston	Barnwell County	South Carolina
Total occupied units	1,227	8,116	2,117,989
Year moved in
2020 or later	14.6%	17.9%	25.6%
2010 to 2019	45.2%	34%	39.4%
2000 to 2009	15.3%	17.6%	16%
1999 or earlier	24.8%	30.5%	19%
Occupants per room
1.00 or fewer	99.6%	96.6%	98%
1.01 to 1.50	0%	2.6%	1.4%
1.51 or more	0.4%	0.8%	0.6%
Vehicles availability
No vehicles	10.2%	10.6%	5.7%
1 vehicle	38%	32.2%	32.2%
2 vehicles	34.1%	34%	38.5%
3 or more vehicles	17.7%	23.2%	23.6%
House heating fuel used
Gas	27.5%	22.7%	27.1%
Electricity	72.5%	75.6%	70.8%
Solar	0%	0%	0.2%
Fuel oil, kerosene etc	0%	0.2%	0.5%
All other fuels	0%	0.9%	0.6%
No fuel used	0%	0.6%	0.7%
Selected characteristics
Lacking complete plumbing	0%	0.6%	0.3%
Lacking complete kitchen	0%	0.5%	0.6%
No telephone service available	0%	0.7%	0.8%

Housing Value

What owner-occupied units are worth

Median home value

$105,100

owner-occupied units

Median value(USD)

Williston

$105,100

Barnwell County

$106,000

South Carolina

$259,000

Housing Cost Burden

30.7%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

30.7%

Owners without a mortgage

12.8%

Renters

14.5%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Williston	Barnwell County	South Carolina
Property value
Median Value	$105,100	$106,000	$259,000
Under $100,000	47.4%	47.4%	16.8%
$100,000 - $200,000	36.5%	25.7%	19.5%
$200,000 - $300,000	10.1%	14.7%	21.8%
$300,000 - $500,000	4.8%	10.2%	25.5%
$500,000 - $1,000,000	1%	1.3%	12.7%
$1,000,000 and more	0%	0.7%	3.7%
Owner-occupied households
With a mortgage	60.4%	40.8%	57.1%
Without a mortgage	39.6%	59.2%	42.9%
Median monthly owner costs
With a mortgage	$1,039	$1,252	$1,529
Without a mortgage	$476	$426	$448
Gross rent
Median rent	$677	$740	$1,180

Education Profile

How educated is the community and how education pays off

Adults with a college degree

18.6%

of adults 25+ with a bachelor's degree or higher

Williston 18.6%

Barnwell County 13.9%

South Carolina 32.1%

Adults without a high school diploma

14.4%

of adults (25+) without a high school diploma

Williston 14.4%

Barnwell County 16.1%

South Carolina 9.9%

School Enrollment

Who is enrolled in school and at what level

School enrollment

628

population (age 3+) enrolled in school

Nursery / Preschool

17%

K–12

74.8%

College / Undergraduate

8.1%

Graduate / Professional

College-going rate (18-24 yr olds)

20.9%

of 18-24-year-olds in college or graduate school

Williston

20.9%

Barnwell County

14.5%

South Carolina

37.5%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Williston	Barnwell County	South Carolina
Total enrolled (age 3+)	628	4,532	1,202,992
Nursery / preschool	17%	10.3%	5.2%
K–12	74.8%	76.2%	69.7%
Kindergarten	14.3%	3.7%	5.5%
Elementary: Grades 1–4	34.6%	26.8%	20.6%
Elementary: Grades 5–8	4.1%	20.2%	21.4%
High School: Grades 9–12	21.8%	25.5%	22.2%
College or graduate school	8.1%	13.5%	25.1%
College, undergraduate	8.1%	10.2%	20%
Graduate, professional school	0%	3.3%	5%
College-going rate · 18-24 yr olds	20.9%	14.5%	37.5%
School type
Public school	90.1%	85.3%	82.7%
Private school	9.9%	14.7%	17.3%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

1,975

population 25 years and over

Total adults (25+)

Less than 9th grade

7.1%

9th-12th, no diploma

7.3%

HS graduate

37.1%

Some college no degree

21.5%

Associates degree

8.3%

Bachelors degree

16.5%

Graduate or professional degree

2.1%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

25.5% · 74.5%

9th-12th, no diploma

41.7% · 58.3%

HS graduate

56.2% · 43.8%

Some college no degree

58.8% · 41.2%

Associates degree

16.5% · 83.5%

Bachelors degree

41.1% · 58.9%

Graduate or professional degree

11.9% · 88.1%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Williston	Barnwell County	South Carolina
Population (25+)	1,975	14,055	3,677,078
Less than 9th grade	7.1%	6.1%	3.1%
9th–12th, no diploma	7.3%	10%	6.8%
High school diploma or GED	37.1%	39.7%	28.2%
Some college, no degree	21.5%	18.2%	19.8%
Associate's degree	8.3%	12.1%	10%
Bachelor's degree or higher	18.6%	13.9%	32.1%
Bachelor's degree	16.5%	8.5%	19.8%
Graduate or professional	2.1%	5.4%	12.3%
High School or higher	85.6%	83.9%	90.1%

Earnings by education level

percentage as applicable

Median Earnings

$36,525

Median earnings for adults 25+, by level

Less than HS graduate

$—

HS graduate

$24,219

Some college or associates

$34,637

Bachelors degree

$89,963

Graduate or professional degree

$—

Poverty Rate

4.6%

for ages 25+, with bachelors degree or higher

Less than HS graduate

56.1%

HS graduate

23.3%

Some college or associates

15.9%

Bachelors degree or higher

4.6%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Williston	Barnwell County	South Carolina
Median earnings
Population 25+, with earnings	$36,525	$42,189	$47,658
Less than high school graduate	$—	$23,333	$30,223
High school graduate (includes equivalency)	$24,219	$35,656	$37,196
Some college or associate's degree	$34,637	$42,157	$44,160
Bachelor's degree	$89,963	$74,167	$61,860
Graduate or professional degree	$—	$66,736	$73,671
Poverty rates
Less than high school graduate	56.1%	43.6%	28.4%
High school graduate (includes equivalency)	23.3%	21.2%	15.6%
Some college or associate's degree	15.9%	12.6%	10.2%
Bachelor's degree or higher	4.6%	3.4%	4.7%

Insights for Williston, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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