Clark County, Ohio Demographics 2026

Population Overview

Clark County is located in Ohio with a total population of 135,445. It is the 21st most populous county out of 88 in Ohio. The county encompasses 1 Census-designated place.

Age Demographics

The median age in Clark County is 41.2 years. This is 4% higher than the state median of 39.6 years.

Economy, Income & Housing

The median household income in Clark County is $60,846. This is 13% lower than the state median of $69,680. Compared to the national median of $78,538, household income here is 23% lower. The poverty rate stands at 15.6%. This is 18% higher than the state poverty rate of 13.2%. The unemployment rate is 6.5%. This is 34% higher than the state rate of 4.9%. The median home value is $155,900. Housing costs are 22% lower than the state median of $199,200. With a home-value-to-income ratio of just 2.6x, Clark County is one of the most affordable housing markets in the area. 69.2% of occupied housing units are owner-occupied. This homeownership rate is 3% higher than the state average of 67.0%.

Race & Ethnicity

The largest racial or ethnic group in Clark County is White (non-Hispanic), making up 82.4% of the population. Black or African American residents account for 8.2%. The Asian population (0.6%) is well below the state average of 2.4%.

Education

18.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 40% lower than the state rate of 30.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 89.3%.