In 2022, Jefferson County, KS had a population of 18.4k people with a median age of 43.2 and a median household income of $74,562. Between 2021 and 2022 the population of Jefferson County, KS declined from 18,391 to 18,387, a −0.0217% decrease and its median household income grew from $72,270 to $74,562, a 3.17% increase.
The 5 largest ethnic groups in Jefferson County, KS are White (Non-Hispanic) (92.3%), Two+ (Non-Hispanic) (2.97%), White (Hispanic) (1.5%), Two+ (Hispanic) (1.39%), and Black or African American (Non-Hispanic) (0.664%).
None of the households in Jefferson County, KS reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
99.5% of the residents in Jefferson County, KS are U.S. citizens.
In 2022, the median property value in Jefferson County, KS was $193,000, and the homeownership rate was 85%.
Most people in Jefferson County, KS drove alone to work, and the average commute time was 28.8 minutes. The average car ownership in Jefferson County, KS was 2 cars per household.
Jefferson County, KS borders Atchison County, KS, Douglas County, KS, Jackson County, KS, Leavenworth County, KS, and Shawnee County, KS.