Duncan, Oklahoma Population 2024

23,439

Duncan is a city located in Comanche County, Cotton County, Garvin County, Grady County, Jefferson County, and Stephens County Oklahoma. Duncan has a 2024 population of 23,439. It is also the county seat of Stephens County. Duncan is currently growing at a rate of 0.85% annually and its population has increased by 3.48% since the most recent census, which recorded a population of 22,651 in 2020.

The average household income in Duncan is $72,567 with a poverty rate of 19.19%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Duncan is 39.7 years, 38.2 years for males, and 41.4 years for females.

Duncan Demographics

According to the most recent ACS, the racial composition of Duncan was:

  • White: 78.11%
  • Two or more races: 10.34%
  • Native American: 3.97%
  • Other race: 3.83%
  • Black or African American: 2.8%
  • Asian: 0.66%
  • Native Hawaiian or Pacific Islander: 0.28%
Land Area (mi²)
42.9 sq mi
Density (mi²)
545.90/sq mi
Growth Since 2020
3.48% (788)
The current population of Duncan, Oklahoma is 23,439 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 22,651.

Duncan, Oklahoma Population 2024

Population by Race

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Race
Population
Percentage (of total)
White17,77878.11%
Two or more races2,35410.34%
Native American9043.97%
Other race8713.83%
Black or African American6372.8%
Asian1510.66%
Native Hawaiian or Pacific Islander640.28%

White

Two or more races

Native American

Other race

Black or African American

Asian

Native Hawaiian or Pacific Islander

Duncan Population by Race

Duncan Population Pyramid 2024

Duncan Median Age

39.7

Total

38.2

Male

41.4

Female

Duncan Adults

There are 17,722 adults, (4,637 of whom are seniors) in Duncan.

Duncan Age Dependency

73.9

Age Dependency Ratio

35.4

Old Age Dependency Ratio

38.5

Child Dependency Ratio

Duncan Sex Ratio

Female11,76351.69%
Male10,99648.31%

Duncan Population by Age

Duncan Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All9,2312.4267.732.3
Married4,3433.0781.218.8
Non Family3,3171.1859.140.9
Female1,2203.2647.652.4
Male3513.125149

2.99

Average Family Size

2.42

Average Household Size

67.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Duncan Households and Families

Male

Female

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Education Attained
Count
Percentage
9th to 12th Grade1,5169.62%
Associates Degree7654.86%
Bachelors Degree1,89112%
Graduate Degree1,1887.54%
High School Graduate6,22239.49%
Less Than 9th Grade6324.01%
Some College3,54122.48%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Duncan Educational Attainment by Sex (over 25)

Duncan Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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Race
Total
High School
Bachelors
White12,47611,1812,556
2+ Races1,3501,017296
Hispanic1,303845183
Native American50743839
Other Race47027323
Black44631945
Asian877816
Islander464633

The highest rate of high school graduation is among islander people with a rate of 100%.

The highest rate of bachelors degrees is among islander people with a rate of 71.74%.

Duncan Educational Attainment by Race

All

Male

Female

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Name
Average
Male
Female
Bachelors Degree$50,169$49,286$50,855
Graduate Degree$69,668$81,375$69,045
High School Graduate$31,958$37,865$24,298
Less Than 9th Grade$32,125$37,399$16,747
Overall$37,202$45,000$29,790
Some College$39,434$55,069$29,781

$37,202

Average Earnings

$45,000

Average Male

$29,790

Average Female

Duncan Earnings by Educational Attainment

Duncan Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Duncan Language

92.38% of Duncan residents speak only English, while 7.62% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.12% of the population.

Duncan Language

Duncan Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White16,8113,14218.69%
Multiple2,32153823.18%
Hispanic2,51041616.57%
Other87123827.32%
Native88316718.91%
Black5725910.31%
Asian1514227.81%

19.19%

Overall Poverty Rate

16.43%

Male Poverty Rate

21.73%

Female Poverty Rate

Poverty in Duncan

The race most likely to be in poverty in Duncan is Asian, with 27.81% below the poverty level.

The race least likely to be in poverty in Duncan is Black, with 10.31% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 6.51%. Among those working part-time, it was 24.19%, and for those that did not work, the poverty rate was 23.97%.

Duncan Poverty

rate

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Rate
Poverty
Less Than 9th Grade30.85%
High School17.65%
Some College15.93%
Bachelors or Greater2.9%

Duncan Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed62.59%
Male Unemployed27.31%
Female Employed12.5%
Male Employed9.72%

Duncan Poverty Rate by Employment Status and Sex

Duncan Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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Name
Median
Mean
Families$67,341$85,311
Households$55,162$72,567
Married Families$79,924$-999,999,999
Non Families$29,789$45,961

mean

median

Income by Household Type

Duncan Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

49.4%

Overall Marriage Rate

49.7%

Male Marriage Rate

49.2%

Female Marriage Rate

Duncan Married by Age and Sex

male

female

Duncan Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Duncan Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Duncan Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,688

Number of Veterans

1,458

Male Veterans

230

Female Veterans

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War
Veterans
Vietnam594
Second Gulf War443
First Gulf War419
Korea63
World War II29

Duncan Veterans by War

count

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Age Group
Veterans
35 to 54488
65 to 74415
75+412
55 to 64259
18 to 34114

Duncan Veterans by Age

count

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Name
Veterans
% of Total
White1,41810%
2+ Races1177.06%
Hispanic1116.83%
Black7013.97%
Native American6310.18%
Other Race203.44%

Duncan Veterans by Race

Duncan Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

12.12%

Veteran Poverty Rate

46.36%

Veteran Disability Rate

Duncan Veterans by Education

LaborForceParticipation

55%

Labor Force Participation

52.1%

Employment Rate

5.2%

Unemployment Rate

Duncan Employment by Age

LaborForceParticipation

Duncan Employment by Race

LaborForceParticipation

Duncan Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

64.84%

Born in Duncan

96.83%

Native Born

3.17%

Foreign Born

2.13%

Non Citizen

1.04%

Naturalized

Place of Birth

96.83% of Duncan residents were born in the United States, with 64.84% having been born in Oklahoma. 2.13% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Duncan Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202924,4241970.81%
202824,2271970.82%
202724,0301970.83%
202623,8331970.83%
202523,6361970.84%
202423,4391970.85%
202323,2421970.85%
202223,0452331.02%
202122,8121610.71%
202022,6512731.22%
201922,378120.05%
201822,366-108-0.48%
201722,474-349-1.53%
201622,823-301-1.3%
201523,12410%
201423,123-220-0.94%
201323,343400.17%
201223,303-128-0.55%
201123,431-7-0.03%
201023,4389334.15%
200022,5057733.56%
199021,732-785-3.49%
198022,5172,79914.2%
197019,718-291-1.45%
196020,0094,68430.56%
195015,3256,11866.45%
19409,20784410.09%
19308,3634,900141.5%
19203,46300%
showing: 29 rows

Duncan Population by Year