United States › Illinois › Knox County COUNTY · 2000 CENSUS
Knox County Illinois · 55,836 residents · 716 sq mi
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The short version
Knox County is home to 55,836 people in Illinois. The median age is 39.4, about 4 years above the US median. About 15% of adults have finished a four-year degree. The typical home is worth $63,400, having risen by half since 1990. Households here earn about 24% less than in Illinois as a whole. Renters pay $411 a month at the median.
At a glance
Lower income
below the US median
US median: $42,589
Older
median age 39.4
US median: 35.2
Less educated
15% hold a bachelor's degree
US average: 24%
Less affordable
home values up 31%, inflation adjusted
US median home: $120,530
Section 01
Population & growth from 36.3 in 1990
US average: 35.2
Population, 1990 – 2024
48K 51K 53K 55K 57K 1990 2000 2010 2020 2024 Knox County Age distribution, 2000
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $35,407
+10%inflation adjusted, since 1990
from $24,523 in 1990
US average: $42,589
from $11,973 in 1990
US average: $21,522
from 13.9% in 1990
US average: 12.4%
$63,400
+31%inflation adjusted, since 1990
from $36,800 in 1990
US average: $120,530
$411
+5%inflation adjusted, since 1990
from $298 in 1990
US average: $602
from 69.1% in 1990
28.4% rent
Section 04
Race & ethnicity 1990
White, non-Hispanic 93.1%(52,490)
Hispanic / Latino 2.4%(1,373)
2000
White, non-Hispanic 88.4%(49,355)
Hispanic / Latino 3.4%(1,896)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Detailed origin tables are available for 2024; showing 2024 data.
Hispanic origin
+ 1 more hispanic origin group with data Ancestry
+ 31 more ancestry groups with data from 12.7% in 1990
US average: 24.4%
High school or higher
from 76.6% in 1990
US average: 80.3%
from 4.2% in 1990
US average: 8.8%
Section 06
Commute & transportation from 17.2 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
Men 15+
Never married 24.1%(5,428)
Women 15+
Never married 19.1%(4,448)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Section 09
Health coverage Showing 2024 (the nearest year with coverage data).
from 11.4% in 2013
US average: 8.4%
from 51.8% in 2020
US average: 54.8%
Direct-purchase
from 19.1% in 2020
US average: 13.8%
from 22.9% in 2020
US average: 18.4%
from 23.9% in 2020
US average: 20.9%
VA health care
from 2.6% in 2020
US average: 2.2%
Any private
from 68.1% in 2020
US average: 67.1%
Any public
from 44.0% 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) 17.8%(510)
Gulf War (1990s) 13.3%(379)
Share of the 2,858 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 Knox County Head to head
Compare Knox County to nearby counties KNOX COUNTY VS
Warren County
Income $67,385 +90%
Home value $105,000 +66%
Population 16,222 −66%
SEE FULL COMPARISON →
KNOX COUNTY VS
Stark County
Income $62,878 +78%
Home value $104,500 +65%
Population 5,319 −89%
SEE FULL COMPARISON →
KNOX COUNTY VS
Peoria County
Income $65,108 +84%
Home value $158,500 +150%
Population 178,553 +274%
SEE FULL COMPARISON →
KNOX COUNTY VS
Henry County
Income $71,911 +103%
Home value $151,600 +139%
Population 48,095 +1%
SEE FULL COMPARISON →
Frequently asked
How many people live in Knox County, Illinois? Knox County, Illinois has about 55,836 residents according to the 2000 Census.
What is the median household income in Knox County, Illinois? The typical household in Knox County, Illinois earns about $35,407 a year. Half of households make more than that, and half make less.
Is Knox County, Illinois expensive? In Knox County, Illinois, the median home is worth about $63,400, and the typical rent is about $411 a month.
How educated are people in Knox County, Illinois? About 14.6% of adults age 25 and over in Knox County, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Knox County, Illinois? About 11.1% of people in Knox County, Illinois live below the federal poverty line.
Has Knox County, Illinois grown since 1990? Yes, Knox County, Illinois has shrunk since 1990. The population has lost about 557 residents, a change of about -1 percent over that period.
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