Demographics of Duncan city, Oklahoma

Duncan city, Oklahoma had 23,238 people on July 1, 2025, by the Census Bureau’s estimate: +613 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Duncan city, in four figures

23,238
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 22,958 ±35.; +2.7%
Change since July 2020: +613 people.; 39.9 ±1.2
Median age: ACS 2020–⁠2024.; $58,054 ±$3,784
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Duncan city, Oklahoma's population grew 2.7% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Duncan city, Oklahoma's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Duncan city, Oklahoma's population grew 2.7% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Duncan city, Oklahoma's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	22,625	100.0	100.0
2021	22,763	100.6	100.2
2022	23,004	101.7	100.7
2023	23,203	102.6	101.6
2024	23,226	102.7	102.5
2025	23,238	102.7	103.1

Population of Duncan city, Oklahoma on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	22,625	—
2021	22,763	+138
2022	23,004	+241
2023	23,203	+199
2024	23,226	+23
2025	23,238	+12

Age, 2020–2024

The median age is 39.9 ±1.2: for men 38.3 ±1.3 and for women 41.9 ±3.1. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

2 more columns on a wider screen

People in Duncan city by age, ACS 2020–2024
Age	People	Share	Oklahoma	United States
Under 5	1,448 ±140	6.3% ±0.6	6.1% ±<0.1	5.6% ±<0.1
5 to 17	3,669 ±299	16.0% ±1.3	17.8% ±0.1	16.3% ±<0.1
18 to 24	1,991 ±241	8.7% ±1.0	9.8% ±0.1	9.1% ±<0.1
25 to 44	5,617 ±334	24.5% ±1.5	26.6% ±0.1	26.9% ±<0.1
45 to 64	5,436 ±343	23.7% ±1.5	23.3% ±0.1	24.8% ±<0.1
65 and over	4,797 ±424	20.9% ±1.8	16.3% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $58,054 ±$3,784, and income per person $33,646 ±$3,081, in 2024 dollars. The median is $65,039 ±$439 in Oklahoma and $80,734 ±$166 in the United States.

Households by income

2 more columns on a wider screen

Households in Duncan city by income, ACS 2020–2024
Household income	Households	Share	Oklahoma	United States
Under $25,000	2,171 ±262	22.9% ±2.7	17.5% ±0.2	14.6% ±<0.1
$25,000 to $49,999	2,095 ±278	22.1% ±2.9	20.9% ±0.3	16.7% ±<0.1
$50,000 to $74,999	1,507 ±247	15.9% ±2.6	18.0% ±0.2	15.5% ±<0.1
$75,000 to $99,999	1,418 ±282	14.9% ±2.9	13.1% ±0.2	12.6% ±<0.1
$100,000 to $149,999	1,229 ±185	12.9% ±1.9	16.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	530 ±171	5.6% ±1.8	7.2% ±0.2	9.6% ±<0.1
$200,000 or more	542 ±147	5.7% ±1.5	7.2% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

2 more columns on a wider screen

Poverty rate in Duncan city by age, ACS 2020–2024
Age	Below poverty	Rate	Oklahoma	United States
All ages	4,612 ±560	20.5% ±2.5	15.3% ±0.2	12.5% ±0.1
Under 18	1,464 ±264	28.8% ±4.6	20.1% ±0.3	16.1% ±0.1
18 to 59	2,214 ±309	19.5% ±2.6	14.8% ±0.2	11.6% ±0.1
60 and over	934 ±236	15.4% ±3.7	11.5% ±0.2	11.0% ±<0.1

Housing, 2020–2024

1 more column on a wider screen

Housing in Duncan city, ACS 2020–2024
Measure	Duncan city	Oklahoma	United States
Housing units	11,106 ±226	1,775,127 ±745	143,775,355 ±10,234
Occupied	85.5% ±1.2	88.0% ±0.2	89.9% ±0.1
Vacant	14.5% ±1.6	12.0% ±0.1	10.1% ±0.1
Owner occupied	67.7% ±2.4	65.8% ±0.2	65.2% ±0.3
Renter occupied	32.3% ±2.3	34.2% ±0.2	34.8% ±0.1
Median home value	$131,500 ±$7,473	$199,800 ±$1,121	$332,700 ±$236
Median gross rent	$896 ±$37	$1,014 ±$6	$1,413 ±$2
Median year built	1972 ±2	1980 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

2 more columns on a wider screen

People in Duncan city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Oklahoma	United States
Hispanic or Latino	2,688 ±196	11.7% ±0.9	12.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	16,968 ±331	73.9% ±1.4	62.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	491 ±144	2.1% ±0.6	6.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	143 ±61	0.6% ±0.3	2.4% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	623 ±147	2.7% ±0.6	6.6% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 19	0% to 0.1%	0.2% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	2 to 126	< 0.1% to 0.5%	0.3% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,981 ±254	8.6% ±1.1	8.9% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

2 more columns on a wider screen

People in Duncan city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Oklahoma	United States
Born in the state	14,369 ±644	62.6% ±2.8	59.6% ±0.2	57.3% ±<0.1
Born in another state	7,611 ±641	33.2% ±2.8	32.9% ±0.2	26.9% ±<0.1
Born a citizen outside the states	41 to 209	0.2% to 0.9%	1.2% ±<0.1	1.7% ±<0.1
Born abroad	853 ±222	3.7% ±1.0	6.4% ±0.1	14.1% ±<0.1
Naturalized citizens	359 ±129	1.6% ±0.6	2.6% ±0.1	7.4% ±<0.1
Not citizens	494 ±196	2.2% ±0.9	3.8% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Duncan city among the places of Oklahoma

20th of 75 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the Oklahoma page.

Places of Oklahoma near Duncan city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Bixby city	30,155 ±164
Jenks city	27,102 ±36
Yukon city	25,529 ±32
Ardmore city	24,877 ±43
Ponca City city	24,326 ±66
Duncan city	22,958 ±35
Sapulpa city	22,570 ±160
Mustang city	22,192 ±42
Del City city	21,494 ±41
Bethany city	20,560 ±45
Claremore city	20,166 ±61

Rankings this appears in

No. 2 Places in Oklahoma by median age
No. 6 Places in Oklahoma by poverty rate
No. 12 Places in Oklahoma by homeownership rate
No. 17 Places in Oklahoma by per capita income
No. 18 Places in Oklahoma by Hispanic or Latino share
No. 21 Places in Oklahoma by foreign-born share

Sources

Census Bureau population estimates — incorporated places and New England towns — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — incorporated places and New England towns and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026