United States › Illinois › Johnson County COUNTY
Johnson County Illinois · 13,363 residents (2025 est.) · 344 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 2020 ACS 2021 ACS 2022 ACS 2023 ACS
The short version
Johnson County is home to 13,376 people in Illinois. 20% of adults hold a bachelor's degree, below the 36% national rate. Owners hold 82% of the housing stock. 1% of locals were born outside the United States. Home values have more than doubled since 2000, reaching $160,500. That trails the Illinois median by roughly 25%.
At a glance
Lower income
below the US median
US median: $82,259
Older
median age 41.4
US median: 38.9
Less educated
20% hold a bachelor's degree
US average: 36%
Less affordable
home values up 39%, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 12,878 in 2000
13,363 in 2025 (Census Bureau estimate)
from 40 / sq mi in 2009
US average: 281
from 36.7 in 2000
US average: 38.9
Population, 1990 – 2024
11K 12K 13K 13K 14K 1990 2000 2010 2020 2024 Johnson County Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $62,528
+3%inflation adjusted, since 2000
from $33,326 in 2000
US average: $82,259
from $17,990 in 2000
US average: $44,673
Households earning $100K+
from 21.2% in 2009
US average: 53.3%
from 11.3% in 2000
US average: 12.5%
from 0.398 in 2010
US average: 0.476
Workforce by industry, 2024
Public administration 3.4%
Agriculture, forestry, fishing 3.2%
Transportation & warehousing 3.1%
Professional, scientific, technical 2.1%
Arts, entertainment, food 1.2%
Education & health services 0.8%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
$160,500
+39%inflation adjusted, since 2000
from $63,400 in 2000
US average: $376,019
$781
+22%inflation adjusted, since 2000
from $351 in 2000
US average: $1,442
from 84.7% in 2000
18.0% rent
from 18.5% in 2009
US average: 10.0%
2.82 people
+12%since 2009
from 2.52 people in 2009
US average: 2.54
from 16.5% in 2009
US average: 22.9%
from 28.3% in 2009
US average: 47.4%
from 2.0 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.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 81.9%(10,553)
Hispanic / Latino 2.9%(368)
2024
White, non-Hispanic 80.1%(10,716)
Hispanic / Latino 4.5%(597)
from 35 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
from 81 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 19 more ancestry groups with data from 11.7% in 2000
US average: 35.6%
High school or higher
from 67.1% in 2000
US average: 89.6%
from 4.4% in 2000
US average: 14.0%
Section 06
Commute & transportation from 19.7 min in 2000
US average: 26.5
from 83.7% in 2009
US average: 68.9%
from 8.5% in 2009
US average: 8.5%
from 0.3% in 2009
US average: 3.2%
from 4.0% in 2009
US average: 15.0%
from 2.2% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 4.0% in 2009
US average: 8.3%
Section 07
Work & employment from 8.7% in 2011
US average: 5.2%
from 39.5% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 64.0% in 2020
US average: 74.6%
from 15.9% in 2009
US average: 13.1%
from 27.3% in 2009
US average: 42.5%
Section 08
People & community from 2.4% in 2009
US average: 14.1%
from 12.9% in 2009
US average: 6.2%
from 18.9% in 2012
US average: 13.3%
from 11.9% in 2013
US average: 8.4%
from 60.7% in 2017
US average: 91.0%
Computer in household
from 79.7% in 2020
US average: 95.5%
from 84.1% in 2020
US average: 87.7%
from 97.3% in 2016
US average: 77.7%
from 1.9% in 2016
US average: 13.6%
Marital status
Men 15+
Never married 47.1%(3,154)
Women 15+
Never married 21.8%(1,008)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 11.9% in 2013
US average: 8.4%
from 59.8% in 2020
US average: 54.8%
Direct-purchase
from 14.6% in 2020
US average: 13.8%
from 26.9% in 2020
US average: 18.4%
from 21.1% in 2020
US average: 20.9%
VA health care
from 4.7% in 2020
US average: 2.2%
Any private
from 70.7% in 2020
US average: 67.1%
Any public
from 45.5% in 2020
US average: 36.7%
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, 2024
Gulf War (2001 or later) 24.7%(219)
Gulf War (1990s) 17.2%(152)
Share of the 886 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.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper
Places similar to Johnson County Head to head
Compare Johnson County to nearby counties JOHNSON COUNTY VS
Williamson County
Income $65,604 +5%
Home value $156,400 −3%
Population 67,225 +403%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Pope County
Income $60,050 −4%
Home value $143,800 −10%
Population 3,672 −73%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Massac County
Income $65,116 +4%
Home value $121,900 −24%
Population 13,502 +1%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Union County
Income $55,728 −11%
Home value $131,700 −18%
Population 16,656 +25%
SEE FULL COMPARISON →
Frequently asked
How many people live in Johnson County, Illinois? Johnson County, Illinois has about 13,376 residents according to the 2024 American Community Survey.
What is the median household income in Johnson County, Illinois? The typical household in Johnson County, Illinois earns about $62,528 a year. Half of households make more than that, and half make less.
Is Johnson County, Illinois expensive? In Johnson County, Illinois, the median home is worth about $160,500, and the typical rent is about $781 a month.
How educated are people in Johnson County, Illinois? About 19.6% of adults age 25 and over in Johnson County, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Johnson County, Illinois? About 17.6% of people in Johnson County, Illinois live below the federal poverty line.
Has Johnson County, Illinois grown since 1990? Yes, Johnson County, Illinois has grown since 1990. The population has added about 2,029 residents, a change of about 18 percent over that period.
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