Population
21,160
2025
−1.5% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Jersey County, IL: population growth, jobs and income
Jersey County gained 5 residents between 2024 and 2025 (+0.0%).
Jersey County had an estimated 21,160 residents in 2025, down 1.5% (333 fewer people) since 2020. That is slower than Illinois as a whole (−0.6%), and the 39th fastest growth of 102 counties in Illinois.
Data as of 2025 · updated
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In the Jersey County report
One-time $99 PDF: everything on this page for Jersey County, ranked against Illinois and the U.S., plus these figures that are not on the free page:
- Median gross rent$846/mo2020–24
- Vacant homes, incl. seasonal and second homes20.0%2020–24
- New homes permitted, last 12 months512025-10/2026-09
- 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
+116
2025
5.5 per 1,000 residents
+199 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
3.8%
2025
−0.6 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
New homes permitted
39
2025
−68.3% since 2021
1.8 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
$80,361
2020–24
+18.4% 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
4,403
2023
−7.8% 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 116 people in 2025: more people moved in from other U.S. counties than moved out.
Private employers had 4,403 paid employees in mid-March 2023, −7.8% since 2018 (County Business Patterns).
Unemployment averaged 3.8% in 2025, 0.6 points lower than in 2019 (before the pandemic).
Builders were authorized to start 39 new homes in 2025, or 1.8 per 1,000 residents.
Median household income was $80,361 in the 2020–24 American Community Survey, +18.4% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 2,352nd.
Part of the St. Louis, MO-IL metro area.
Get Jersey County’s next numbers by email
Email me when Jersey County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Jersey County population by year
| Year | Population | Change |
|---|---|---|
| 2025 | 21,160 | +5 |
| 2024 | 21,155 | −13 |
| 2023 | 21,168 | −54 |
| 2022 | 21,222 | −141 |
| 2021 | 21,363 | −130 |
| 2020 | 21,493 | – |
Census Bureau population estimates, July 1 of each year.
What drove the change in Jersey County
Jersey County lost 333 people since 2020 even though 199 more people moved in from other U.S. counties than left: deaths outnumbered births by 594, and net international migration added 60.
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | −116 | −594 | |
| International migrationfrom and to other countries | +5 | +60 | |
| Domestic migrationfrom and to other U.S. counties | +116 | +199 | |
| Census adjustmentbalancing residual | +0 | +2 | |
| Total change | +5 | −333 |
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 Illinois | Among U.S. counties |
|---|---|---|
| Population growth | 39th of 102 | 2,352nd of 3,107 |
| Net domestic migration per 1,000 residents | 9th of 102 | 995th of 3,108 |
| Private-sector job growth | 81st of 102 | 2,687th of 3,092 |
| Median household income | 18th of 102 | 571st of 3,107 |
| Lowest unemployment rate | 15th of 102 | 1,266th of 3,108 |
| New homes permitted per 1,000 residents | 18th of 98 | 1,611th 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 Jersey County, IL 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 St. Charles County and Madison County reports too, $149 for all 3.
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Neighbouring counties
Over 2020–25, Jersey County's population change (−1.5%) was ahead of 3 of its 5 neighbouring counties and behind 2 (St. Charles County, MO and Madison County).
2 of its 5 neighbouring counties had a higher median household income than Jersey County's $80,361 (2020–24).
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Jersey County, IL This county | 21,160 | −1.5% | 5.5 | 1.8 | $80,361 |
| Greene County, IL | 11,313 | −5.1% | −0.7 | 0.2 | $62,192 |
| Calhoun County, IL | 4,300 | −2.3% | −3.0 | 1.2 | $93,203 |
| Macoupin County, IL | 43,748 | −2.6% | 0.5 | 1.6 | $70,805 |
| St. Charles County, MO | 426,499 | +4.9% | 5.6 | 3.9 | $104,692 |
| Madison County, IL | 263,110 | −1.0% | 1.2 | 1.7 | $75,793 |
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 Jersey County growing?
No. Its population fell 1.5% between 2020 and 2025, about 333 fewer people (Census Bureau population estimates). Illinois as a whole changed −0.6% over the same years. That ranks 39th of 102 counties in Illinois for population growth.
How many people moved to Jersey County?
On net, about 116 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 Jersey County?
It averaged 3.8% in 2025 (BLS Local Area Unemployment Statistics, annual average).
What is the population of Jersey County?
About 21,160 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
How many jobs are in Jersey County?
Private employers there had 4,403 paid employees in mid-March 2023, −7.8% since 2018 (Census Bureau County Business Patterns; government jobs and the self-employed are not counted).
What Beacon CRE covers in Illinois
Map, parcel and listing layers cover North and South Carolina only for now. This page and the other Illinois county pages carry the public federal growth figures.
Jersey County data alerts
Email me when Jersey 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.