Marion County, Kansas Demographics 2026

Population Overview

Marion County is located in Kansas with a total population of 11,795. It is the 37th most populous county out of 105 in Kansas. The county encompasses 3 Census-designated places.

Age Demographics

The median age in Marion County is 43.7 years. This is 17% higher than the state median of 37.2 years. 10.8% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Marion County is $63,438. This is 13% lower than the state median of $72,639. Compared to the national median of $78,538, household income here is 19% lower. The poverty rate stands at 10.0%. This is 13% lower than the state poverty rate of 11.5%. The unemployment rate is 3.0%. This is 23% lower than the state rate of 3.9%. The median home value is $114,400. Housing costs are 44% lower than the state median of $203,400. With a home-value-to-income ratio of just 1.8x, Marion County is one of the most affordable housing markets in the area. 80.8% of occupied housing units are owner-occupied. This homeownership rate is 21% higher than the state average of 66.9%.

Race & Ethnicity

Marion County has a predominantly White (non-Hispanic) population, comprising 91.4% of all residents. Hispanic or Latino residents account for 4.1%. The Black or African American population (1.1%) is well below the state average of 5.3%. The Hispanic or Latino population (4.1%) is well below the state average of 13.3%. The Asian population (0.3%) is well below the state average of 2.9%.

Education

28.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 18% lower than the state rate of 35.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.3%.