McClain County's estimated 2026 population is 51,182 with a growth rate of 2.76% in the past year according to the most recent United States census data. McClain County is the 17th largest county in Oklahoma. The 2010 population was 34,737 and has seen a growth of 47.34% 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 (79.48%)
Two or more races (11.52%)
Native American (5.83%)
Other race (1.69%)
Black or African American (1.05%)
Asian (0.42%)
Native Hawaiian or Pacific Islander (0%)
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
