Demographics of McClain County, Oklahoma

McClain County, Oklahoma had 49,647 people on July 1, 2025, by the Census Bureau’s estimate: +7,725 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

McClain County, in four figures

49,647
Population: July 1, 2025, Vintage 2025 estimate.; +18.4%
Change since July 2020: +7,725 people.; 38.6 ±0.5
Median age: ACS 2020–⁠2024.; $84,552 ±$4,718
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

McClain County, Oklahoma's population grew 18.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of McClain County, 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).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

McClain County, Oklahoma's population grew 18.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of McClain County, 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	41,922	100.0	100.0
2021	43,544	103.9	100.2
2022	45,423	108.4	100.7
2023	47,084	112.3	101.6
2024	48,530	115.8	102.5
2025	49,647	118.4	103.1

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Population of McClain County, Oklahoma on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	41,922	+251	+13	0	+250
2021	43,544	+1,622	−43	+5	+1,746
2022	45,423	+1,879	+8	+19	+1,770
2023	47,084	+1,661	+68	+19	+1,542
2024	48,530	+1,446	+122	+15	+1,304
2025	49,647	+1,117	+112	−7	+1,022

Age, 2020–2024

The median age is 38.6 ±0.5: for men 38.5 ±0.6 and for women 38.8 ±0.7. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in McClain County by age, ACS 2020–2024
Age	People	Share	Oklahoma	United States
Under 5	2,493 ±45	5.5% ±0.1	6.1% ±<0.1	5.6% ±<0.1
5 to 17	8,864 ±341	19.6% ±0.8	17.8% ±0.1	16.3% ±<0.1
18 to 24	3,456 ±298	7.6% ±0.7	9.8% ±0.1	9.1% ±<0.1
25 to 44	11,993 ±452	26.5% ±1.0	26.6% ±0.1	26.9% ±<0.1
45 to 64	11,413 ±393	25.2% ±0.9	23.3% ±0.1	24.8% ±<0.1
65 and over	7,054 ±461	15.6% ±1.0	16.3% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $84,552 ±$4,718, and income per person $40,394 ±$2,292, in 2024 dollars. The median is $65,039 ±$439 in Oklahoma and $80,734 ±$166 in the United States.

Households by income

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Households in McClain County by income, ACS 2020–2024
Household income	Households	Share	Oklahoma	United States
Under $25,000	1,751 ±275	10.7% ±1.7	17.5% ±0.2	14.6% ±<0.1
$25,000 to $49,999	2,818 ±344	17.2% ±2.1	20.9% ±0.3	16.7% ±<0.1
$50,000 to $74,999	2,819 ±333	17.2% ±2.0	18.0% ±0.2	15.5% ±<0.1
$75,000 to $99,999	2,348 ±305	14.3% ±1.9	13.1% ±0.2	12.6% ±<0.1
$100,000 to $149,999	3,439 ±394	20.9% ±2.4	16.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	1,594 ±276	9.7% ±1.7	7.2% ±0.2	9.6% ±<0.1
$200,000 or more	1,652 ±265	10.1% ±1.6	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).

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Poverty rate in McClain County by age, ACS 2020–2024
Age	Below poverty	Rate	Oklahoma	United States
All ages	3,835 ±557	8.5% ±1.2	15.3% ±0.2	12.5% ±0.1
Under 18	1,167 ±240	10.3% ±2.1	20.1% ±0.3	16.1% ±0.1
18 to 59	1,734 ±321	7.3% ±1.3	14.8% ±0.2	11.6% ±0.1
60 and over	934 ±225	9.4% ±2.2	11.5% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in McClain County, ACS 2020–2024
Measure	McClain County	Oklahoma	United States
Housing units	17,630 ±62	1,775,127 ±745	143,775,355 ±10,234
Occupied	93.1% ±1.0	88.0% ±0.2	89.9% ±0.1
Vacant	6.9% ±1.0	12.0% ±0.1	10.1% ±0.1
Owner occupied	79.3% ±1.9	65.8% ±0.2	65.2% ±0.3
Renter occupied	20.7% ±1.9	34.2% ±0.2	34.8% ±0.1
Median home value	$255,900 ±$13,168	$199,800 ±$1,121	$332,700 ±$236
Median gross rent	$954 ±$49	$1,014 ±$6	$1,413 ±$2
Median year built	1997 ±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

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People in McClain County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Oklahoma	United States
Hispanic or Latino	4,414 ±0	9.7% ±<0.1	12.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	34,150 ±274	75.4% ±0.6	62.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	550 ±98	1.2% ±0.2	6.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	269 ±76	0.6% ±0.2	2.4% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	2,478 ±300	5.5% ±0.7	6.6% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 6	0% to < 0.1%	0.2% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	28 to 248	0.1% to 0.5%	0.3% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	3,272 ±388	7.2% ±0.9	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).

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People in McClain County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Oklahoma	United States
Born in the state	31,719 ±809	70.1% ±1.8	59.6% ±0.2	57.3% ±<0.1
Born in another state	11,640 ±736	25.7% ±1.6	32.9% ±0.2	26.9% ±<0.1
Born a citizen outside the states	332 ±139	0.7% ±0.3	1.2% ±<0.1	1.7% ±<0.1
Born abroad	1,582 ±218	3.5% ±0.5	6.4% ±0.1	14.1% ±<0.1
Naturalized citizens	736 ±170	1.6% ±0.4	2.6% ±0.1	7.4% ±<0.1
Not citizens	846 ±201	1.9% ±0.4	3.8% ±0.1	6.8% ±<0.1

McClain County among the counties of Oklahoma

18th of 77 by population, July 2025. Every one is listed on the Oklahoma page.

Counties of Oklahoma near McClain County in population, July 2025
County	July 2025	Change since 2020
Grady County	59,128	+7.7%
Logan County	55,473	+11.5%
Washington County	54,037	+2.7%
Bryan County	51,367	+10.9%
Le Flore County	50,196	+4.1%
McClain County	49,647	+18.4%
Cherokee County	49,196	+4.5%
Carter County	48,910	+1.8%
Osage County	46,794	+2.2%
Stephens County	44,310	+3.4%
Kay County	43,490	−0.3%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — 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

Data retrieved September 25, 2026