Duncan is a city located in Oklahoma. With a 2020 population of 21,778, it is the 21st largest city in Oklahoma and the 1729th largest city in the United States. Duncan is currently declining at a rate of -1.45% annually and its population has decreased by -7.05% since the most recent census, which recorded a population of 23,431 in 2010. Duncan reached it's highest population of 23,443 in 2010. Spanning over 48 miles, Duncan has a population density of 508 people per square mile.
The average household income in Duncan is $59,592 with a poverty rate of 16.61%. The median rental costs in recent years comes to $689 per month, and the median house value is $102,600. The median age in Duncan is 37.9 years, 35.9 years for males, and 39.5 years for females. For every 100 females there are 90.7 males.
According to the most recent ACS, the racial composition of Duncan was:
2019 and 2020 population is estimated by projecting the raw 2018 numbers.
| Year | Total Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2020 | 42,973 | -146 | -0.34% |
| 2019 | 43,119 | -146 | -0.34% |
| 2018 | 43,265 | -146 | -0.34% |
| 2017 | 43,411 | -626 | -1.44% |
| 2016 | 44,037 | -570 | -1.29% |
| 2015 | 44,607 | 14 | 0.03% |
| 2014 | 44,593 | -413 | -0.93% |
| 2013 | 45,006 | 102 | 0.23% |
| 2012 | 44,904 | -213 | -0.47% |
| 2011 | 45,117 | 14 | 0.03% |
| 2010 | 45,103 | 0.00% |
| Race | Population | Percentage |
|---|---|---|
| White | 18,060 | 79.13% |
| Some Other Race | 1,453 | 6.37% |
| Two or More Races | 1,201 | 5.26% |
| American Indian and Alaska Native | 1,149 | 5.03% |
| Black or African American | 715 | 3.13% |
| Asian | 223 | 0.98% |
| Native Hawaiian and Other Pacific Islander | 22 | 0.10% |
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 8,959 | 2.5 | 64.4 |
| Married | 4,084 | 3.17 | 77.3 |
| Non Family | 3,341 | 1.22 | 55.5 |
| Female | 1,091 | 3.52 | 49.5 |
| Male | 443 | 3.43 | 50.6 |
| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 623 | 4.04% |
| 9th to 12th Grade | 1,341 | 8.70% |
| High School Graduate | 5,962 | 38.68% |
| Some College | 3,814 | 24.75% |
| Associates Degree | 815 | 5.29% |
| Bachelors Degree | 2,049 | 13.29% |
| Graduate Degree | 809 | 5.25% |
| Name | Total | High School | Bachelors |
|---|---|---|---|
| White | 12,335 | 11,038 | 2,492 |
| Hispanic | 1,241 | 870 | 55 |
| Other Race | 713 | 477 | 25 |
| Native American | 675 | 627 | 113 |
| Multiple Races | 552 | 485 | 99 |
| Black | 505 | 356 | 64 |
| Asian | 154 | 83 | 35 |
| Islander | 22 | 22 | 15 |
The highest rate of high school graduation is among islander people with a rate of 100.00%.
The highest rate of bachelors degrees is among islander people with a rate of 68.18%.
$29,380
Average Earnings
$40,771
Average Male
$22,145
Average Female
91.77% of Duncan residents speak only English, while 8.23% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.82% of the population.
| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 16,802 | 2,608 | 15.52% |
| Hispanic | 2,564 | 476 | 18.56% |
| Native | 1,098 | 269 | 24.50% |
| Other | 1,446 | 267 | 18.46% |
| Multiple | 1,146 | 226 | 19.72% |
| Black | 661 | 98 | 14.83% |
| Asian | 223 | 65 | 29.15% |
16.61%
Overall Poverty Rate
13.88%
Male Poverty Rate
19.05%
Female Poverty Rate
The race most likely to be in poverty in Duncan is Asian, with 29.15% below the poverty level.
The race least likely to be in poverty in Duncan is Black, with 14.83% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 4.32%. Among those working part-time, it was 18.19%, and for those that did not work, the poverty rate was 22.14%.
49.5%
Overall Marriage Rate
51.8%
Male Marriage Rate
47.4%
Female Marriage Rate
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 45-54.
| Name | Veterans | % of Total |
|---|---|---|
| White | 1,449 | 10.36% |
| Indian | 125 | 16.71% |
| Black | 96 | 16.78% |
| 2 or More | 66 | 10.54% |
| Hispanic | 47 | 2.96% |
| Other | 4 | 0.40% |
9.64%
Veteran Poverty Rate
34.01%
Veteran Disability Rate
57.4%
Labor Force Participation
53.6%
Employment Rate
6.5%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
95.89%
Native Born
4.11%
Foreign Born
2.44%
Non Citizen
1.67%
Naturalized
95.89% of Duncan residents were born in the United States, with 63.89% having been born in Oklahoma. 2.44% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.
| Year | Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2020 | 21,778 | -321 | -1.45% |
| 2019 | 22,099 | -321 | -1.43% |
| 2018 | 22,420 | -105 | -0.47% |
| 2017 | 22,525 | -321 | -1.41% |
| 2016 | 22,846 | -302 | -1.30% |
| 2015 | 23,148 | 3 | 0.01% |
| 2014 | 23,145 | -217 | -0.93% |
| 2013 | 23,362 | 44 | 0.19% |
| 2012 | 23,318 | -122 | -0.52% |
| 2011 | 23,440 | -3 | -0.01% |
| 2010 | 23,443 | 938 | 0.41% |
| 2000 | 22,505 | 773 | 0.35% |
| 1990 | 21,732 | -785 | -0.35% |
| 1980 | 22,517 | 2,799 | 1.34% |
| 1970 | 19,718 | -291 | -0.15% |
| 1960 | 20,009 | 4,684 | 2.70% |
| 1950 | 15,325 | 6,118 | 5.23% |
| 1940 | 9,207 | 844 | 0.97% |
| 1930 | 8,363 | 4,900 | 9.22% |
| 1920 | 3,463 | 0.00% |