Duncan Flag

Duncan

County Seat:
No
Area (mi²):
6.269

Duncan is a town located in Spartanburg County, South Carolina. Duncan has a 2025 population of 4,675. Duncan is currently growing at a rate of 2.68% annually and its population has increased by 15.01% since the most recent census, which recorded a population of 4,065 in 2020.

The average household income in Duncan is $71,800 with a poverty rate of 17.09%.The median age in Duncan is 30.9 years: 30.4 years for males, and 32.3 years for females.

4.7K
Total Population
746
Density (mi²)
122 2.68%
Growth

Duncan Population

Duncan Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Duncan includes 55.93% White, 40.6% Black or African American, and smaller percentages for Two or more races, other race and multiracial populations.

Population by Race

White (55.9%)

Black or African American (40.6%)

Two or more races (2.3%)

Other race (1.1%)

Race
Population
Percentage (of total)
White2,33555.93%
Black or African American1,69540.6%
Two or more races972.32%
Other race481.15%

Duncan Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Duncan's average per capita income is $39,658. Household income levels show a median of $51,596. The poverty rate stands at 17.09%.

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$69,431-
Families$69,239$75,338
Households$51,596$71,800
Non Families$34,102$63,726

$39,658

Average Income

$51,596

Median Household Income

17.09%

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)