Sumner County, Kansas Demographics 2026

Population Overview

Sumner County is located in Kansas with a total population of 22,386. It is the 25th most populous county out of 105 in Kansas. The county encompasses 2 Census-designated places.

Age Demographics

The median age in Sumner County is 41.2 years. This is 11% higher than the state median of 37.2 years.

Economy, Income & Housing

The median household income in Sumner County is $60,348. This is 17% lower than the state median of $72,639. Compared to the national median of $78,538, household income here is 23% lower. The poverty rate stands at 10.8%. This is 7% lower than the state poverty rate of 11.5%. The unemployment rate is 5.9%. This is 52% higher than the state rate of 3.9%. The median home value is $118,700. Housing costs are 42% lower than the state median of $203,400. With a home-value-to-income ratio of just 2.0x, Sumner County is one of the most affordable housing markets in the area. 74.4% of occupied housing units are owner-occupied. This homeownership rate is 11% higher than the state average of 66.9%.

Race & Ethnicity

Sumner County has a predominantly White (non-Hispanic) population, comprising 87.2% of all residents. Hispanic or Latino residents account for 5.9%. The Black or African American population (1.1%) is well below the state average of 5.3%. The Hispanic or Latino population (5.9%) is well below the state average of 13.3%. The Asian population (0.4%) is well below the state average of 2.9%.

Education

26.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 24% 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 94.0%.