United States › Illinois › Johnson County COUNTY · 2020 ACS
Johnson County Illinois · 13,308 residents · 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 2021 ACS 2022 ACS 2023 ACS 2024 ACS
The short version
With 13,308 people, Johnson County is a county in Illinois. 16% of adults hold a bachelor's degree, below the 33% national rate. Owners hold 82% of the housing stock. Home values have more than doubled since 2000, reaching $117,500. 2% of locals were born outside the United States. At a median age of 42.8, this is an older place than the country as a whole.
At a glance
Lower income
below the US median
US median: $66,278
Older
median age 42.8
US median: 38.8
Less educated
16% hold a bachelor's degree
US average: 33%
Stable housing
home values roughly flat, inflation adjusted
US median home: $265,253
Section 01
Population & growth from 36.7 in 2000
US average: 38.8
Population, 1990 – 2024
11K 12K 13K 13K 14K 1990 2000 2010 2020 2024 Johnson County Age distribution, 2020
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Section 02
Income & economy $55,363
+11%inflation adjusted, since 2000
from $33,326 in 2000
US average: $66,278
from $17,990 in 2000
US average: $35,364
Households earning $100K+
from 21.2% in 2009
US average: 43.9%
from 11.3% in 2000
US average: 12.8%
Workforce by industry, 2020
Public administration 5.5%
Professional, scientific, technical 3.1%
Agriculture, forestry, fishing 2.9%
Transportation & warehousing 2.6%
Education & health services 2%
Arts, entertainment, food 1.6%
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$117,500
+23%inflation adjusted, since 2000
from $63,400 in 2000
US average: $265,253
$637
+21%inflation adjusted, since 2000
from $351 in 2000
US average: $1,124
from 84.7% in 2000
18.4% rent
from 2.52 people in 2009
US average: 2.61
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.
Section 04
Race & ethnicity 2000
White, non-Hispanic 81.9%(10,553)
Hispanic / Latino 2.9%(368)
2020
White, non-Hispanic 81.9%(10,895)
Hispanic / Latino 4.1%(552)
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 20 more ancestry groups with data from 11.7% in 2000
US average: 32.9%
High school or higher
from 67.1% in 2000
US average: 88.5%
from 4.4% in 2000
US average: 12.7%
Section 06
Commute & transportation from 19.7 min in 2000
US average: 26.9
from 83.7% in 2009
US average: 75.1%
from 4.0% in 2009
US average: 8.4%
Section 07
Work & employment from 8.7% in 2011
US average: 5.4%
from 39.5% in 2011
US average: 63.4%
Women 20-64 in the labor force
US average: 73.3%
from 27.3% in 2009
US average: 39.3%
Section 08
People & community from 2.4% in 2009
US average: 13.5%
from 11.9% in 2013
US average: 8.8%
Computer in household
US average: 91.9%
Marital status (2024)
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: 8.8%
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) 9.5%(96)
Gulf War (1990s) 16.1%(162)
Share of the 1,006 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 Johnson County Head to head
Compare Johnson County to nearby counties JOHNSON COUNTY VS
Williamson County
Income $65,604 +18%
Home value $156,400 +33%
Population 67,225 +403%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Pope County
Income $60,050 +8%
Home value $143,800 +22%
Population 3,672 −73%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Massac County
Income $65,116 +18%
Home value $121,900 +4%
Population 13,502 +1%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Union County
Income $55,728 +1%
Home value $131,700 +12%
Population 16,656 +25%
SEE FULL COMPARISON →
Frequently asked
How many people live in Johnson County, Illinois? Johnson County, Illinois has about 13,308 residents according to the 2020 American Community Survey.
What is the median household income in Johnson County, Illinois? The typical household in Johnson County, Illinois earns about $55,363 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 $117,500, and the typical rent is about $637 a month.
How educated are people in Johnson County, Illinois? About 16.0% 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 12.9% 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 1,961 residents, a change of about 17 percent over that period.
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