Population
18,296
2025
−0.2% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Jefferson County, KS: population growth, jobs and income
Jefferson County lost 11 residents between 2024 and 2025 (−0.1%).
Jefferson County had an estimated 18,296 residents in 2025, down 0.2% (34 fewer people) since 2020. That is slower than Kansas as a whole (+1.3%), and the 30th fastest growth of 105 counties in Kansas.
Data as of 2025 · updated
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In the Jefferson County report
One-time $99 PDF: everything on this page for Jefferson County, ranked against Kansas and the U.S., plus these figures that are not on the free page:
- Median gross rent$835/mo2020–24
- Vacant homes, incl. seasonal and second homes7.8%2020–24
- New homes permitted, last 12 months712025-10/2026-09
- Rent growth, 5 yearsIn the report
- Permits in 5+ unit buildingsIn the report
- IRS income moving in (net AGI)In the report
- Neighbouring-county comparison tableIn the report
What's inside: 5 pages
- 1 Summary, headline numbers and ranks (free preview)
- 2 Ranks and the neighbouring-county table
- 3 Migration, with IRS mover and income flows
- 4 Rent, vacant homes, permits and employers
- 5 Every source and the methods
Headline numbers
Net domestic migration
+39
2025
2.1 per 1,000 residents
+211 in total, 2021–2025
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. People moving in from other U.S. counties minus people moving out.
Unemployment rate
3.5%
2025
+0.3 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
New homes permitted
80
2025
+25.0% since 2021
4.4 per 1,000 residents
Source: U.S. Census Bureau, Building Permits Survey, 2025. Housing units authorized by building permits in the year.
Median household income
$81,278
2020–24
+20.5% since 2016–20
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–24. American Community Survey 5-year estimate.
Private-sector employment
2,580
2023
+13.9% since 2018
Source: U.S. Census Bureau, County Business Patterns, 2023. Paid employees of private employers in mid-March (County Business Patterns).
What the numbers say
Net domestic migration added 39 people in 2025: more people moved in from other U.S. counties than moved out.
Private employers had 2,580 paid employees in mid-March 2023, +13.9% since 2018 (County Business Patterns).
Unemployment averaged 3.5% in 2025, 0.3 points higher than in 2019 (before the pandemic).
Builders were authorized to start 80 new homes in 2025, or 4.4 per 1,000 residents.
Median household income was $81,278 in the 2020–24 American Community Survey, +20.5% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 1,939th.
Part of the Topeka, KS metro area.
Get Jefferson County’s next numbers by email
Email me when Jefferson County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Jefferson County population by year
| Year | Population | Change |
|---|---|---|
| 2025 | 18,296 | −11 |
| 2024 | 18,307 | +10 |
| 2023 | 18,297 | −53 |
| 2022 | 18,350 | −96 |
| 2021 | 18,446 | +116 |
| 2020 | 18,330 | – |
Census Bureau population estimates, July 1 of each year.
What drove the change in Jefferson County
Jefferson County lost 34 people since 2020 even though 211 more people moved in from other U.S. counties than left: deaths outnumbered births by 252, and net international migration added 15.
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | −49 | −252 | |
| International migrationfrom and to other countries | +0 | +15 | |
| Domestic migrationfrom and to other U.S. counties | +39 | +211 | |
| Census adjustmentbalancing residual | −1 | −8 | |
| Total change | −11 | −34 |
Census Bureau population estimates, components of change, each year July 1 to June 30. The components add up to the change in the estimate; the Census adjustment is the small balancing figure the Bureau publishes.
How it ranks
| Measure | In Kansas | Among U.S. counties |
|---|---|---|
| Population growth | 30th of 105 | 1,939th of 3,107 |
| Net domestic migration per 1,000 residents | 31st of 105 | 1,530th of 3,108 |
| Private-sector job growth | 9th of 105 | 422nd of 3,092 |
| Median household income | 8th of 105 | 528th of 3,107 |
| Lowest unemployment rate | 53rd of 105 | 929th of 3,108 |
| New homes permitted per 1,000 residents | 9th of 103 | 736th of 3,005 |
1st = highest (lowest for unemployment). Counties are ranked only against others with a figure for the same period.
Get the county report — $99
The County Growth and Demographics Report for Jefferson County, KS as a PDF, from federal data: population and migration, housing and rents, permits, private employers and jobs, unemployment, ranks in the state and the country, and neighbouring counties, with a source next to every number. Pay once, no subscription.
Add 2 neighbouring counties for $50: the Shawnee County and Douglas County reports too, $149 for all 3.
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Neighbouring counties
Over 2020–25, Jefferson County's population change (−0.2%) was ahead of 1 of its 5 neighbouring counties and behind 4.
Only Leavenworth County had a higher median household income (2020–24) among its 5 neighbouring counties; Jefferson County's was $81,278.
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Jefferson County, KS This county | 18,296 | −0.2% | 2.1 | 4.4 | $81,278 |
| Atchison County, KS | 16,172 | −0.9% | 0.1 | 1.2 | $61,112 |
| Douglas County, KS | 120,920 | +1.8% | −6.0 | 3.1 | $69,746 |
| Leavenworth County, KS | 84,590 | +3.2% | −0.7 | 3.4 | $89,218 |
| Shawnee County, KS | 178,607 | −0.1% | 1.3 | 2.6 | $67,104 |
| Jackson County, KS | 13,438 | +1.5% | 0.8 | 1.8 | $75,215 |
Census Bureau population estimates and building permits, American Community Survey 5-year income. Rates per 1,000 residents. – means no figure, or a base too small for a change or rate (it would swing on a few people). A figure from another period shows its year and is left out of the comparison.
Questions
Is Jefferson County growing?
No. Its population fell 0.2% between 2020 and 2025, about 34 fewer people (Census Bureau population estimates). Kansas as a whole changed +1.3% over the same years. That ranks 30th of 105 counties in Kansas for population growth.
How many people moved to Jefferson County?
On net, about 39 people in 2025: that many more moved in from other U.S. counties than moved out (Census Bureau net domestic migration estimate).
What is the unemployment rate in Jefferson County?
It averaged 3.5% in 2025 (BLS Local Area Unemployment Statistics, annual average).
What is the population of Jefferson County?
About 18,296 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
How many jobs are in Jefferson County?
Private employers there had 2,580 paid employees in mid-March 2023, +13.9% since 2018 (Census Bureau County Business Patterns; government jobs and the self-employed are not counted).
What Beacon CRE covers in Kansas
Map, parcel and listing layers cover North and South Carolina only for now. This page and the other Kansas county pages carry the public federal growth figures.
Jefferson County data alerts
Email me when Jefferson County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Sources and method
- U.S. Census Bureau, Population Estimates Program (Vintage 2025)
- U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics
- U.S. Census Bureau, Building Permits Survey
- U.S. Census Bureau, American Community Survey 5-year estimates
- U.S. Census Bureau, County Business Patterns
Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.
Jobs outside North and South Carolina use County Business Patterns (paid private-sector employees in mid-March); wages and government jobs are not included.