In 2019, Sumner County, KS had a population of 23.1k people with a median age of 41.2 and a median household income of $55,000. Between 2018 and 2019 the population of Sumner County, KS declined from 23,208 to 23,114, a −0.405% decrease and its median household income grew from $54,915 to $55,000, a 0.155% increase.
The 5 largest ethnic groups in Sumner County, KS are White (Non-Hispanic) (89.6%), White (Hispanic) (4.42%), Two+ (Non-Hispanic) (2.09%), American Indian & Alaska Native (Non-Hispanic) (1.29%), and Black or African American (Non-Hispanic) (0.956%). 0% of the households in Sumner County, KS speak a non-English language at home as their primary language.
99.5% of the residents in Sumner County, KS are U.S. citizens.
In 2019, the median property value in Sumner County, KS was $89,800, and the homeownership rate was 74.1%. Most people in Sumner County, KS drove alone to work, and the average commute time was 21.5 minutes. The average car ownership in Sumner County, KS was 2 cars per household.