McClain County, Oklahoma Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 21st-largest in Oklahoma

The population of McClain County, Oklahoma is 43,779 as of the 2023 American Community Survey, making it the 21st-largest county in Oklahoma. The median household income is $84,778, the median home value is $233,900, and the median age is 38.9.

The population of McClain County has grown 39.4% since 2010 (34,737 → 48,434), a +2.40% annualized rate.

McClain County within Oklahoma · Source: US Census TIGER/Line via us-atlas

43,779

Population

+2.40%

Annual growth

People / sq mi

$84,778

Median Income

$233,900

Median Home Value

McClain County covers 571 sq mi of land at 76.7 people per square mile.

About McClain County, OK

McClain County is a county in Oklahoma with a population of 43,779. It ranks #21 among counties in Oklahoma by population. The median age is 38.9, in line with the national median. The population is 49.9% male and 50.1% female.

The median household income in McClain County is $84,778, above the US median of $74,580. 6.3% of residents live below the federal poverty level. Home values sit at a median of $233,900, with monthly rent averaging $964. The homeownership rate of 78.5% is higher than the national rate of 64.8%.

Educational attainment in McClain County reflects 28.0% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.3% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 28.8 minutes each way.

McClain County Population History (2010-2024)

The county of McClain County had a population of 34,737 in 2010 and 48,434 in 2024, a 39.4% growth over 14 years. The peak was 48,434 in 2024. Average annual growth rate: 2.41%.

48,434

Population (2024)

34,737

Population (2010)

48,434

Peak (2024)

2.41%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	34,737	-	-	estimate
2011	35,199	+462	+1.33%	estimate
2012	35,583	+384	+1.09%	estimate
2013	36,459	+876	+2.46%	estimate
2014	37,248	+789	+2.16%	estimate
2015	37,981	+733	+1.97%	estimate
2016	38,625	+644	+1.70%	estimate
2017	39,310	+685	+1.77%	estimate
2018	39,855	+545	+1.39%	estimate
2019	40,466	+611	+1.53%	estimate
2020	41,910	+1,444	+3.57%	estimate
2021	43,538	+1,628	+3.88%	estimate
2022	45,422	+1,884	+4.33%	estimate
2023	47,060	+1,638	+3.61%	estimate
2024	48,434	+1,374	+2.92%	estimate

Race & Ethnicity

White	79.5%
Black or African American	1.1%
Asian	0.0%
Hispanic or Latino (any race)	11.2%
Two or More Races	0.0%

Age & Sex

38.9

Median Age

50.1%

Female

49.9%

Male

15.5%

Age 65+

Age Distribution

Under 5

5.5%

5–9

7.0%

10–14

8.0%

15–19

7.2%

20–24

5.3%

25–34

11.6%

35–44

14.6%

45–54

12.7%

55–59

6.6%

60–64

6.2%

65–74

9.4%

75–84

5.2%

85+

0.9%

Children (under 15): 20.5% · Seniors (65+): 15.5%

Income & Poverty

Median household income	$84,778+$21,175 vs state
Mean household income	$103,428
Per-capita income	$39,352
Poverty rate	6.3%-4.8% vs state
Unemployment rate	3.0%
Employment-to-population	60.5%

Top Industries by Employment

Professional & business services

23.8%

Construction

10.3%

Finance & real estate

9.2%

Manufacturing

7.5%

Public administration

7.3%

Retail trade

6.5%

Education & health care

6.3%

Agriculture

6.3%

The largest employment sector in McClain County is professional & business services, accounting for 23.8% of workers.

How residents commute

0.1%

Drive alone

1.0%

Carpool

82.2%

Public transit

9.3%

Work from home

28.8 min

Avg commute

Housing

$233,900+$48,000 vs state

Median home value

$964

Median rent

78.5%

Homeownership rate

17,125

Total housing units

93.6%

Occupied

6.4%

Vacant

21.5%

Renter-occupied

Social & access

90.2%

With health insurance

95.3%

With broadband internet

26.6%

Foreign-born

8.2%

Veterans (18+)

14.5%

With a disability

93.2%

Speak language other than English at home

Education

88.6%

High School+

28.0%

Bachelor's+

Largest cities in Oklahoma

Oklahoma City (688,693)Tulsa (412,322)Norman (128,714)Broken Arrow (115,919)Edmond (95,618)Lawton (90,662)Moore (63,045)Midwest City (58,170)Enid (50,821)Stillwater (48,818)All Oklahoma cities →

Other counties in Oklahoma

Oklahoma County (800,487)Tulsa County (673,708)Cleveland County (297,545)Canadian County (162,621)Comanche County (121,699)Rogers County (97,235)Wagoner County (84,339)Payne County (82,290)Pottawatomie County (73,011)Creek County (72,353)All Oklahoma counties →

Part of Oklahoma

Oklahoma demographic profile All Oklahoma data →

Metro areas in Oklahoma

Oklahoma City (1,445,122)Tulsa (1,026,209)Fort Smith (228,916)Lawton (127,174)Enid (62,322)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

McClain County, Oklahoma has a population of 43,779 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 21st-largest county in Oklahoma. Population density is 77 people per square mile.

The population of McClain County has grown 39.4% since 2010 (34,737 → 48,434), a +2.40% annualized rate.

The median household income in McClain County, Oklahoma is $84,778, with mean (average) household income of $103,428 and per-capita income of $39,352. 6.3% of residents live below the federal poverty level.

In McClain County, the largest racial and ethnic groups are White (79.5%), Hispanic or Latino (11.2%), Black or African American (1.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in McClain County, Oklahoma is 38.9 years. Residents are 50.1% female and 49.9% male.

The median home value in McClain County is $233,900 and median monthly rent is $964. 78.5% of occupied housing units are owner-occupied. The county has 17,125 total housing units, 6.4% of which are vacant.

The largest employment sector in McClain County, Oklahoma is professional, scientific, and management services, employing 23.8% of workers. The unemployment rate is 3.0%.

Oklahoma City is among the largest cities associated with McClain County, Oklahoma, with a population of 688,693.