McClain County, Oklahoma Demographics 2026

Population Overview

McClain County is located in Oklahoma with a total population of 43,779. It is the 21st most populous county out of 77 in Oklahoma.

Age Demographics

The median age in McClain County is 38.9 years. This is 5% higher than the state median of 36.9 years.

Economy, Income & Housing

The median household income in McClain County is $84,778. This is 33% higher than the state median of $63,603. Compared to the national median of $78,538, household income here is 8% higher. The poverty rate stands at 7.8%. This is 49% lower than the state poverty rate of 15.3%. The unemployment rate is 4.7%. This is 5% lower than the state rate of 4.9%. The median home value is $233,900. Housing costs are 26% higher than the state median of $185,900. With a home-value-to-income ratio of just 2.8x, McClain County is one of the most affordable housing markets in the area. 78.5% of occupied housing units are owner-occupied. This homeownership rate is 19% higher than the state average of 65.8%.

Race & Ethnicity

The largest racial or ethnic group in McClain County is White (non-Hispanic), making up 76.3% of the population. Hispanic or Latino residents account for 9.3%. The Black or African American population (1.1%) is well below the state average of 6.9%. The Asian population (0.4%) is well below the state average of 2.3%.

Education

28.0% of residents aged 25 and older hold a bachelor's degree or higher. This is about average than the state rate of 27.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 88.6%.