United States › Kansas › Jefferson County COUNTY · 2020 ACS
Jefferson County Kansas · 18,368 residents · 533 sq mi
Time machine
COMPARE TO 1990 Census 2000 Census 2009 ACS 2010 ACS 2011 ACS 2012 ACS 2013 ACS 2014 ACS 2015 ACS 2016 ACS 2017 ACS 2018 ACS 2019 ACS 2021 ACS 2022 ACS 2023 ACS 2024 ACS
The short version
With 18,368 people, Jefferson County is a county in Kansas. Owners hold 83% of the housing stock. The median age is 43.7, about 5 years above the US median. 1% of people here were born outside the United States. About 25% of adults have finished a four-year degree. The typical home is worth $163,400, having more than doubled since 2000.
At a glance
Average income
near the US median
US median: $66,278
Older
median age 43.7
US median: 38.8
Less educated
25% hold a bachelor's degree
US average: 33%
Less affordable
home values up 25%, inflation adjusted
US median home: $265,253
Section 01
Population & growth 18,368
Unchangedsince 2000
from 18,426 in 2000
from 38.0 in 2000
US average: 38.8
Population, 1990 – 2024
16K 17K 18K 18K 19K 1990 2000 2010 2020 2024 Jefferson County Age distribution, 2020
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Section 02
Income & economy $67,429
−1%inflation adjusted, since 2000
from $45,535 in 2000
US average: $66,278
from $19,373 in 2000
US average: $35,364
Households earning $100K+
from 30.5% in 2009
US average: 43.9%
from 6.7% in 2000
US average: 12.8%
Workforce by industry, 2020
Professional, scientific, technical 4.8%
Public administration 4.7%
Agriculture, forestry, fishing 3.1%
Education & health services 2.3%
Transportation & warehousing 2%
Arts, entertainment, food 1.7%
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$163,400
+25%inflation adjusted, since 2000
from $86,900 in 2000
US average: $265,253
$759
+13%inflation adjusted, since 2000
from $447 in 2000
US average: $1,124
from 84.8% in 2000
16.9% rent
from 2.42 people in 2009
US average: 2.61
from 2.3 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Section 04
Race & ethnicity 2000
White, non-Hispanic 96%(17,683)
Hispanic / Latino 1.3%(236)
2020
White, non-Hispanic 90.1%(16,549)
Hispanic / Latino 3.1%(567)
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 21 more ancestry groups with data from 17.9% in 2000
US average: 32.9%
High school or higher
from 88.9% in 2000
US average: 88.5%
from 6.0% in 2000
US average: 12.7%
Section 06
Commute & transportation from 21.0 min in 2000
US average: 26.9
from 77.9% in 2009
US average: 75.1%
from 3.1% in 2009
US average: 8.4%
Section 07
Work & employment from 4.9% in 2011
US average: 5.4%
from 68.3% in 2011
US average: 63.4%
Women 20-64 in the labor force
US average: 73.3%
from 34.5% in 2009
US average: 39.3%
Section 08
People & community from 0.9% in 2009
US average: 13.5%
from 8.9% in 2013
US average: 8.8%
Computer in household
US average: 91.9%
Marital status (2024)
Men 15+
Never married 25.2%(1,935)
Women 15+
Never married 18.4%(1,376)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 8.9% in 2013
US average: 8.8%
Direct-purchase
US average: 13.7%
VA health care
US average: 2.3%
Any private
US average: 68.1%
Any public
US average: 35.2%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2020
Gulf War (2001 or later) 12.8%(183)
Gulf War (1990s) 13.9%(199)
Share of the 1,432 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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Drill deeper
Places similar to Jefferson County Head to head
Compare Jefferson County to nearby counties JEFFERSON COUNTY VS
Leavenworth County
Income $89,218 +32%
Home value $282,900 +73%
Population 84,590 +362%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Atchison County
Income $61,112 −9%
Home value $145,700 −11%
Population 16,172 −12%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Douglas County
Income $69,746 +3%
Home value $309,400 +89%
Population 120,920 +561%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Shawnee County
Income $67,104 same
Home value $180,900 +11%
Population 178,607 +876%
SEE FULL COMPARISON →
Frequently asked
How many people live in Jefferson County, Kansas? Jefferson County, Kansas has about 18,368 residents according to the 2020 American Community Survey.
What is the median household income in Jefferson County, Kansas? The typical household in Jefferson County, Kansas earns about $67,429 a year. Half of households make more than that, and half make less.
Is Jefferson County, Kansas expensive? In Jefferson County, Kansas, the median home is worth about $163,400, and the typical rent is about $759 a month.
How educated are people in Jefferson County, Kansas? About 24.5% of adults age 25 and over in Jefferson County, Kansas hold a bachelor's degree or higher.
What is the poverty rate in Jefferson County, Kansas? About 6.7% of people in Jefferson County, Kansas live below the federal poverty line.
Has Jefferson County, Kansas grown since 1990? Yes, Jefferson County, Kansas has grown since 1990. The population has added about 2,463 residents, a change of about 15 percent over that period.
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