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.
According to the most recent ACS, the racial composition of Duncan was:
White
Two or more races
Native American
Other race
Black or African American
Asian
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 9,231 | 2.42 | 67.7 | 32.3 |
| Married | 4,343 | 3.07 | 81.2 | 18.8 |
| Non Family | 3,317 | 1.18 | 59.1 | 40.9 |
| Female | 1,220 | 3.26 | 47.6 | 52.4 |
| Male | 351 | 3.12 | 51 | 49 |
2.99
Average Family Size
2.42
Average Household Size
67.7%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
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%.
All
Male
Female
$37,202
Average Earnings
$45,000
Average Male
$29,790
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
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.
rate
19.19%
Overall Poverty Rate
16.43%
Male Poverty Rate
21.73%
Female Poverty Rate
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%.
Married
Widowed
Divorced
Separated
NeverMarried
49.4%
Overall Marriage Rate
49.7%
Male Marriage Rate
49.2%
Female Marriage Rate
male
female
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.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
12.12%
Veteran Poverty Rate
46.36%
Veteran Disability Rate
LaborForceParticipation
55%
Labor Force Participation
52.1%
Employment Rate
5.2%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
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.
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
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.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 24,424 | 197 | 0.81% |
| 2028 | 24,227 | 197 | 0.82% |
| 2027 | 24,030 | 197 | 0.83% |
| 2026 | 23,833 | 197 | 0.83% |
| 2025 | 23,636 | 197 | 0.84% |
| 2024 | 23,439 | 197 | 0.85% |
| 2023 | 23,242 | 197 | 0.85% |
| 2022 | 23,045 | 233 | 1.02% |
| 2021 | 22,812 | 161 | 0.71% |
| 2020 | 22,651 | 273 | 1.22% |
| 2019 | 22,378 | 12 | 0.05% |
| 2018 | 22,366 | -108 | -0.48% |
| 2017 | 22,474 | -349 | -1.53% |
| 2016 | 22,823 | -301 | -1.3% |
| 2015 | 23,124 | 1 | 0% |
| 2014 | 23,123 | -220 | -0.94% |
| 2013 | 23,343 | 40 | 0.17% |
| 2012 | 23,303 | -128 | -0.55% |
| 2011 | 23,431 | -7 | -0.03% |
| 2010 | 23,438 | 933 | 4.15% |
| 2000 | 22,505 | 773 | 3.56% |
| 1990 | 21,732 | -785 | -3.49% |
| 1980 | 22,517 | 2,799 | 14.2% |
| 1970 | 19,718 | -291 | -1.45% |
| 1960 | 20,009 | 4,684 | 30.56% |
| 1950 | 15,325 | 6,118 | 66.45% |
| 1940 | 9,207 | 844 | 10.09% |
| 1930 | 8,363 | 4,900 | 141.5% |
| 1920 | 3,463 | 0 | 0% |