United States › Illinois › Johnson County COUNTY · 2000 CENSUS
Johnson County Illinois · 12,878 residents · 344 sq mi
Time machine
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The short version
Johnson County is a county of 12,878 people in Illinois. 85% of homes are owner-occupied. 12% of adults hold a bachelor's degree, below the 24% national rate. Home values have risen by half since 1990, reaching $63,400. Households here earn about 28% less than in Illinois as a whole. Renters pay $351 a month at the median.
At a glance
Lower income
below the US median
US median: $42,589
Mid-age
median age 36.7
US median: 35.2
Less educated
12% hold a bachelor's degree
US average: 24%
Less affordable
home values up 33%, inflation adjusted
US median home: $120,530
Section 01
Population & growth from 35.5 in 1990
US average: 35.2
Population, 1990 – 2024
11K 12K 13K 13K 14K 1990 2000 2010 2020 2024 Johnson County Age distribution, 2000
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $33,326
+15%inflation adjusted, since 1990
from $21,953 in 1990
US average: $42,589
from $9,170 in 1990
US average: $21,522
from 15.6% in 1990
US average: 12.4%
$63,400
+33%inflation adjusted, since 1990
from $36,300 in 1990
US average: $120,530
$351
+13%inflation adjusted, since 1990
from $235 in 1990
US average: $602
from 81.7% in 1990
15.3% rent
Section 04
Race & ethnicity 1990
White, non-Hispanic 90%(10,211)
Hispanic / Latino 2.2%(249)
2000
White, non-Hispanic 81.9%(10,553)
Hispanic / Latino 2.9%(368)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Detailed origin tables are available for 2024; showing 2024 data.
Ancestry
+ 19 more ancestry groups with data from 9.1% in 1990
US average: 24.4%
High school or higher
from 66.2% in 1990
US average: 80.3%
from 3.4% in 1990
US average: 8.8%
Section 06
Commute & transportation from 23.3 min in 1990
US average: 17.6
Section 07
Work & employment No data for the years selected.
Section 08
People & community No data for the years selected.
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Section 09
Health coverage Showing 2024 (the nearest year with coverage data).
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.
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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 +97%
Home value $156,400 +147%
Population 67,225 +403%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Pope County
Income $60,050 +80%
Home value $143,800 +127%
Population 3,672 −73%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Massac County
Income $65,116 +95%
Home value $121,900 +92%
Population 13,502 +1%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Union County
Income $55,728 +67%
Home value $131,700 +108%
Population 16,656 +25%
SEE FULL COMPARISON →
Frequently asked
How many people live in Johnson County, Illinois? Johnson County, Illinois has about 12,878 residents according to the 2000 Census.
What is the median household income in Johnson County, Illinois? The typical household in Johnson County, Illinois earns about $33,326 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 $63,400, and the typical rent is about $351 a month.
How educated are people in Johnson County, Illinois? About 11.7% 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 11.3% 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 1,531 residents, a change of about 13 percent over that period.
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