Duncan, Oklahoma Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Duncan, Oklahoma is 22,872 as of the 2023 American Community Survey, making it the 20th-largest city in Oklahoma. The median household income is $57,020, the median home value is $125,800, and the median age is 40.0.
The population has declined 1.1% since 2010 (23,439 → 23,174).
22,872
Population
533
People / sq mi
$57,020
Median Income
$125,800
Median Home Value
Duncan covers 42.9 sq mi of land at 533 people per square mile.
About Duncan, OK
Duncan is a city in Oklahoma with a population of 22,872. It ranks #20 among cities in Oklahoma by population. The median age is 40.0, in line with the national median. The population is 48.6% male and 51.4% female.
The median household income in Duncan is $57,020, below the US median of $74,580. 14.1% of residents live below the federal poverty level. Home values sit at a median of $125,800, with monthly rent averaging $872. The homeownership rate of 67.8% is higher than the national rate of 64.8%.
Educational attainment in Duncan reflects 19.5% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 4.7% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 20.5 minutes each way.
Duncan city Population History (2010-2024)
The city of Duncan city had a population of 23,439 in 2010 and 23,174 in 2024, a -1.1% growth over 14 years. The peak was 23,439 in 2010. Average annual growth rate: -0.08%.
23,174
Population (2024)
23,439
Population (2010)
23,439
Peak (2010)
-0.08%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 23,439 |
| 2011 | 23,431 |
| 2012 | 23,302 |
| 2013 | 23,341 |
| 2014 | 23,123 |
| 2015 | 23,125 |
| 2016 | 22,815 |
| 2017 | 22,477 |
| 2018 | 22,361 |
| 2019 | 22,344 |
| 2020 | 22,653 |
| 2021 | 22,781 |
| 2022 | 23,023 |
| 2023 | 23,198 |
| 2024 | 23,174 |
Race & Ethnicity
| White | 78.0% |
| Black or African American | 2.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 9.2% |
| Two or More Races | 0.0% |
Economy & Income
$57,020
Median Household Income
$33,531
Per Capita Income
14.1%
Poverty Rate
3.4%
Unemployment Rate
Housing
$125,800
Median Home Value
$872
Median Rent
67.8%
Owner-Occupied
Education
85.6%
High School+
19.5%
Bachelor's+
Commute
0.2%
Drive Alone
77.0%
Public Transit
4.7%
Work From Home
20.5 min
Avg Commute
Community Profile
31.5%
Foreign Born
92.6%
Non-English at Home
9.3%
Veterans
20.5%
With Disability
84.4%
Health Insurance
92.2%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 21.5% |
| Agriculture & Mining | 9.7% |
| Manufacturing | 9.3% |
| Education, Health Care & Social Services | 8.9% |
| Construction | 7.9% |
| Finance, Insurance & Real Estate | 6.8% |
| Arts, Entertainment & Food Services | 5.3% |
| Information | 4.7% |
| Retail Trade | 4.5% |
| Public Administration | 2.6% |
| Transportation & Warehousing | 1.0% |
Largest cities in Oklahoma
Largest counties in Oklahoma
Part of Oklahoma
Metro areas in Oklahoma
City rankings
Frequently Asked Questions
Duncan, Oklahoma has a population of 22,872 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 20th-largest city in Oklahoma.
The median household income in Duncan, Oklahoma is $57,020, with 14.1% of residents living below the federal poverty level.
The median home value in Duncan, Oklahoma is $125,800, with median monthly rent at $872 and a homeownership rate of 67.8%.
The median age in Duncan, Oklahoma is 40.0 years. The population is 48.6% male and 51.4% female.
The population has declined 1.1% since 2010 (23,439 → 23,174).
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Statewide data for Oklahoma
Population, race, income, age, and trends across Oklahoma
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.