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 and multiracial populations.

Population by 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%

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