McClain County, Oklahoma
Located in Oklahoma, McClain County has a population of 45,273 residents and a median age of 38.6 years, making it the #1,096 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 8.5%. The median home value is $255,900, and the median household income is $84,552, which is 13% above the national median.
Demographics
McClain County has a population of 45,273, making it the #1,096 most populous county in the US. The median age is 38.6 years, which is 0.8% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in McClain County is $84,552, ranking #434 out of 3,222 counties — 12.5% above the national median. The poverty rate is 8.5% and unemployment stands at 4.7%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in McClain County is $255,900 (-9.2% vs national). Renters pay a median of $954/mo and the homeownership rate is 79.3%.
Median Home Value Trend
Rankings →Household Type
Education
In McClain County, 28.7% of adults age 25+ hold a bachelor's degree or higher, which is 14.8% below the national average, ranking #860 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in McClain County is 75.6 years. 18.7% of adults report poor or fair health and 13.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
15.7% of adults in McClain County smoke , 37.9% are obese , and 17.0% report excessive drinking. The drug overdose death rate is 16.9 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in McClain County is 4.2 per 100,000 and the suicide rate is 20.9 per 100,000. Motor vehicle deaths occur at a rate of 21.5 per 100,000.
Homicide Rate Trend
Families & Children
12.6% of children in McClain County live in poverty and the infant mortality rate is 7.1 per 1,000 live births. The teen birth rate is 16.8 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in McClain County is 66.2%. The mean commute time is 30.3 min, which is 9.9% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, McClain County voted Republican with a margin of 60.7%. The vote was 18.8% Dem / 79.5% Rep. Compared to 2020, the margin shifted +0.2 toward Democrats .
Vote Share Over Time
About McClain County, Oklahoma
McClain County, Oklahoma has a total population of 45,273, making it the 1,096th most populous county in the United States. The median age in McClain County is 38.6 years, which is 0.8% below the national median of 38.9 years.
The median household income in McClain County is $84,552, which ranks #434 of 3,222 counties nationwide. This is 12.5% above the national median of $75,149. The poverty rate is 8.5%, lower than the national rate of 12.6%. The unemployment rate stands at 4.7%.
The median home value in McClain County is $255,900, 9.2% below the national median. Renters in McClain County pay a median gross rent of $954 per month. The homeownership rate is 79.3%, compared to the national rate of 64.4%.
In McClain County, 28.7% of residents aged 25 and older hold a bachelor's degree or higher, 14.8% below the national average of 33.7%. Health insurance coverage stands at 90.5% of the population. The average commute time for workers is 30.3 min.
McClain County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 75.4% of the population, followed by Hispanic or Latino (9.7%) and Two or More Races (7.2%).
All data for McClain County, Oklahoma comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.