In 2018, Jefferson County, KS had a population of 18.9k people with a median age of 44.2 and a median household income of $61,793. Between 2017 and 2018 the population of Jefferson County, KS grew from 18,856 to 18,888, a 0.17% increase and its median household income grew from $58,935 to $61,793, a 4.85% increase.
The 5 largest ethnic groups in Jefferson County, KS are White (Non-Hispanic) (93.7%), Two+ (Non-Hispanic) (2.21%), White (Hispanic) (1.85%), American Indian & Alaska Native (Non-Hispanic) (0.683%), and Black or African American (Non-Hispanic) (0.678%). NaNk% of the people in Jefferson County, KS speak a non-English language, and 99.7% are U.S. citizens.
The median property value in Jefferson County, KS is $145,000, and the homeownership rate is 82%. Most people in Jefferson County, KS commute by Drove Alone, and the average commute time is 29.6 minutes. The average car ownership in Jefferson County, KS is 2 cars per household.