In 2023, Jefferson County, KS had a population of 18.4k people with a median age of 43.8 and a median household income of $77,393. Between 2022 and 2023 the population of Jefferson County, KS grew from 18,387 to 18,391, a 0.0218% increase and its median household income grew from $74,562 to $77,393, a 3.8% increase.
The 5 largest ethnic groups in Jefferson County, KS are White (Non-Hispanic) (91.6%), Two+ (Non-Hispanic) (3.52%), White (Hispanic) (1.6%), Two+ (Hispanic) (1.49%), and Black or African American (Non-Hispanic) (0.636%).
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.
99.6% of the residents in Jefferson County, KS are U.S. citizens.
In 2023, the median property value in Jefferson County, KS was $200,800, and the homeownership rate was 85%.
Most people in Jefferson County, KS drove alone to work, and the average commute time was 28.9 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.