Blenheim

County:: Marlboro County
County Seat:: No
Area (mi²):: 0.653
State:: South Carolina

Blenheim is a town located in Marlboro County, South Carolina. Blenheim has a 2025 population of 107. Blenheim is currently declining at a rate of -0.93% annually and its population has decreased by -6.14% since the most recent census, which recorded a population of 114 in 2020.

The average household income in Blenheim is $64,627 with a poverty rate of 11.63%. The median age in Blenheim is 35.2 years: 30.6 years for males, and 35.8 years for females.

Demographics

The racial composition of Blenheim includes 76.09% White, 13.04% Native American, 8.7% Black or African American, and smaller percentages for Two or more races, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Native American

Black or African American

Two or more races

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	35	76.09%
Native American	6	13.04%
Black or African American	4	8.7%
Two or more races	1	2.17%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Blenheim Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Blenheim's average per capita income is $35,000. Household income levels show a median of $66,667. The poverty rate stands at 11.63%.

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
Families	$93,438	$89,293
Households	$66,667	$64,627
Married Families	-	-
Non Families	-	$21,463

$35,000

Average Income

$66,667

Median Household Income

11.63%

Poverty Rate