McClain County's estimated 2025 population is 50,396 with a growth rate of 3.41% in the past year according to the most recent United States census data. McClain County is the 18th largest county in Oklahoma. The 2010 population was 34,737 and has seen a growth of 45.08% since that time.
Data after 2023 is projected based on recent change
The racial composition of McClain County includes 79.48% White, 5.83% Native American, and smaller percentages for other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Native American
Other race
Black or African American
Asian
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 34,797 | 79.48% |
| Two or more races | 5,042 | 11.52% |
| Native American | 2,552 | 5.83% |
| Other race | 742 | 1.69% |
| Black or African American | 460 | 1.05% |
| Asian | 185 | 0.42% |
| Native Hawaiian or Pacific Islander | 1 | 0% |
Married
Widowed
Divorced
Separated
Never Married
McClain County's average per capita income is $52,928. Household income levels show a median of $84,778. The poverty rate stands at 7.81%.
Name | Median | Mean |
|---|---|---|
| Married Families | $107,848 | $126,849 |
| Families | $97,438 | $117,115 |
| Households | $84,778 | $103,428 |
| Non Families | $41,151 | $58,759 |
Average Income
Median Household Income
Poverty Rate
