Blenheim Flag

Blenheim

County:
Marlboro County
County Seat:
No
Area (mi²):
0.653

Blenheim is a town located in Marlboro County, South Carolina. Blenheim has a 2026 population of 104. Blenheim is currently declining at a rate of -0.95% annually and its population has decreased by -7.96% since the most recent census, which recorded a population of 113 in 2020.

The median household income in Blenheim is $49,167 with a poverty rate of 21.52%. The median age in Blenheim is 40.9 years: 45.3 years for males, and 40.6 years for females. For every 100 females there are 78.3 males.

104
Total Population
159
Density (mi²)
-1 -0.95%
Growth

Blenheim Population

Blenheim Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026104-1-0.95%
2025105-2-1.87%
2024107-3-2.73%
202311010.92%
2022109-4-3.54%
202111300%
2020113-1-0.88%
2019141-1-0.7%
2018142-2-1.39%
2017144-1-0.69%
2016145-2-1.36%
2015147-2-1.34%
201414900%
2013149-1-0.67%
2012150-2-1.32%
2011152-2-1.3%
201015400%

Median Age

Overall: 40.9 years
Female: 40.6 years
Male: 45.3 years

Blenheim Adults

There are 71 adults, (22 of whom are seniors) in Blenheim.

Sex Ratio

Female: 46 (56.1%)
Male: 36 (43.9%)

Demographics

The racial composition of Blenheim includes 68.29% White, 23.17% Black or African American, 7.32% Native American, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White5668.29%
Black or African American1923.17%
Native American67.32%
Two or more races11.22%
Race
Population ↓
Percentage (of total)
White5668.29%
Black or African American1923.17%
Native American67.32%
Two or more races11.22%

Blenheim Marital Status

Economics and Income Statistics

Blenheim 's average per capita income is $34,375. Household income levels show a median of $49,167. The poverty rate stands at 21.52%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$95,357-
Families$69,167$73,705
Households$49,167$54,800
Non Families$48,611$35,895

$34,375

Average Income

$49,167

Median Household Income

21.52%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)