Duncan Flag

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.

23.5K
Total Population
548
Density (mi²)
173 0.74%
Growth

Duncan Population

Duncan Population

Data after 2023 is projected based on recent change

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)
White17,83277.96%
Two or more races2,89712.67%
Native American7733.38%
Other race6682.92%
Black or African American5822.54%
Asian1100.48%
Native Hawaiian or Pacific Islander100.04%

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 $39,449. 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

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)