Duncan Flag

Duncan

County Seat:
No
Area (mi²):
7.175

Duncan is a town located in Spartanburg County, South Carolina. Duncan has a 2026 population of 4,856. Duncan is currently growing at a rate of 2.77% annually and its population has increased by 19.31% since the most recent census, which recorded a population of 4,070 in 2020.

The median household income in Duncan is $52,500 with a poverty rate of 12.43%. The median age in Duncan is 34.4 years: 33.5 years for males, and 37 years for females. For every 100 females there are 122.6 males.

4.9K
Total Population
677
Density (mi²)
131 2.77%
Growth

Duncan Population

Duncan Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20264,8561312.77%
20254,7251312.85%
20244,5941393.12%
20234,4551583.68%
20224,2971433.44%
20214,154842.06%
20204,070210.52%
20193,639762.13%
20183,563962.77%
20173,467712.09%
20163,396531.59%
20153,343461.4%
20143,297341.04%
20133,263280.87%
20123,235280.87%
20113,207260.82%
20103,19270.22%
20002,87000%

Median Age

Overall: 34.4 years
Female: 37 years
Male: 33.5 years

Duncan Adults

There are 3,286 adults, (429 of whom are seniors) in Duncan.

Sex Ratio

Female: 1,936 (44.9%)
Male: 2,374 (55.1%)

Demographics

The racial composition of Duncan includes 56.13% White, 32.65% Black or African American, 5.5% other race, and smaller percentages for Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White2,41956.13%
Black or African American1,40732.65%
Other race2375.5%
Two or more races1633.78%
Native American841.95%
Race
Population ↓
Percentage (of total)
Other race1693.92%
Two or more races972.25%
White932.16%
Native American841.95%
Race
Population ↓
Percentage (of total)
White2,32653.97%
Black or African American1,40732.65%
Other race681.58%
Two or more races661.53%

Duncan Marital Status

Economics and Income Statistics

Duncan 's average per capita income is $40,000. Household income levels show a median of $52,500. The poverty rate stands at 12.43%.

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$107,625-
Families$69,422$89,468
Households$52,500$84,142
Non Families$33,629$77,002

$40,000

Average Income

$52,500

Median Household Income

12.43%

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)