McClain County's estimated 2026 population is 50,764 with a growth rate of 2.25% 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 46.14% since that time.
Data after 2023 is projected based on recent change
Overall: 38.6 years
Female: 38.8 years
Male: 38.5 years
There are 33,916 adults, (7,054 of whom are seniors) in McClain County.
Female: 22,677 (50.1%)
Male: 22,596 (49.9%)
The racial composition of McClain County includes 77.73% White, 5.74% Native American, and smaller percentages for other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 35,192 | 77.73% |
| Two or more races | 5,908 | 13.05% |
| Native American | 2,597 | 5.74% |
| Other race | 755 | 1.67% |
| Black or African American | 550 | 1.21% |
| Asian | 269 | 0.59% |
| Native Hawaiian or Pacific Islander | 2 | 0% |
McClain County's average per capita income is $54,019. Household income levels show a median of $84,552. The poverty rate stands at 8.52%.
Name | Median | Mean |
|---|---|---|
| Married Families | $110,524 | $130,812 |
| Families | $98,946 | $122,104 |
| Households | $84,552 | $106,677 |
| Non Families | $40,812 | $56,857 |
Average Income
Median Household Income
Poverty Rate
