In 2017, Jefferson County, KS had a population of 18.9k people with a median age of 44 and a median household income of $58,935. Between 2016 and 2017 the population of Jefferson County, KS declined from 18,880 to 18,856, a -0.127% decrease and its median household income grew from $56,777 to $58,935, a 3.8% increase.
The 5 largest ethnic groups in Jefferson County, KS are White (Non-Hispanic) (93.9%), Two or More Races (Non-Hispanic) (2.33%), White (Hispanic) (1.97%), American Indian & Alaska Native (Non-Hispanic) (0.605%), and Black or African American (Non-Hispanic) (0.557%). N/A% of the people in Jefferson County, KS speak a non-English language, and 99.8% are U.S. citizens.
The median property value in Jefferson County, KS is $135,800, and the homeownership rate is 81.8%. Most people in Jefferson County, KS commute by Drove Alone, and the average commute time is 28.9 minutes. The average car ownership in Jefferson County, KS is 2 cars per household.