Marion County, Ohio Demographics 2026

Population Overview

Marion County is located in Ohio with a total population of 65,145. It is the 38th most populous county out of 88 in Ohio.

Age Demographics

The median age in Marion County is 40.5 years. This is 2% higher than the state median of 39.6 years.

Economy, Income & Housing

The median household income in Marion County is $57,306. This is 18% lower than the state median of $69,680. Compared to the national median of $78,538, household income here is 27% lower. The poverty rate stands at 15.3%. This is 16% higher than the state poverty rate of 13.2%. The unemployment rate is 5.9%. This is 23% higher than the state rate of 4.9%. The median home value is $146,200. Housing costs are 27% lower than the state median of $199,200. With a home-value-to-income ratio of just 2.6x, Marion County is one of the most affordable housing markets in the area. 67.8% of occupied housing units are owner-occupied. This homeownership rate is 1% higher than the state average of 67.0%.

Race & Ethnicity

Marion County has a predominantly White (non-Hispanic) population, comprising 86.6% of all residents. Black or African American residents account for 4.9%. The Black or African American population (4.9%) is well below the state average of 12.1%. The Asian population (0.6%) is well below the state average of 2.4%.

Education

13.7% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 56% 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 89.1%.