Duncan

County:: Stephens County
County Seat:: Yes
Area (mi²):: 42.94
State:: Oklahoma

Duncan is a city located in Stephens County, Oklahoma. Duncan has a 2025 population of 23,515. It is also the county seat of Stephens County. Duncan is currently growing at a rate of 0.74% annually and its population has increased by 3.81% since the most recent census, which recorded a population of 22,652 in 2020.

The average household income in Duncan is $80,585 with a poverty rate of 20.42%.The median age in Duncan is 40 years: 38.2 years for males, and 41.9 years for females.

Demographics

The racial composition of Duncan includes 77.96% White, 3.38% Native American, and smaller percentages for other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	17,832	77.96%
Two or more races	2,897	12.67%
Native American	773	3.38%
Other race	668	2.92%
Black or African American	582	2.54%
Asian	110	0.48%
Native Hawaiian or Pacific Islander	10	0.04%

Duncan Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Duncan's average per capita income is $39,449. Household income levels show a median of $57,020. The poverty rate stands at 20.42%.

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	$85,493	-
Families	$70,605	$96,548
Households	$57,020	$80,585
Non Families	$30,765	$45,977

$39,449

Average Income

$57,020

Median Household Income

20.42%

Poverty Rate