United States › Illinois › Rock Island County COUNTY · 2000 CENSUS
Rock Island County Illinois · 149,374 residents · 427 sq mi
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The short version
Rock Island County is home to 149,374 people in Illinois. About 17% of adults have finished a four-year degree. The typical home is worth $77,800, having risen by half since 1990. That trails the Illinois median by roughly 17%. Getting to work takes 11 minutes on average. Median rent is $450 a month.
At a glance
Lower income
below the US median
US median: $42,589
Older
median age 37.8
US median: 35.2
Less educated
17% hold a bachelor's degree
US average: 24%
Stable housing
home values roughly flat, inflation adjusted
US median home: $120,530
Section 01
Population & growth 149,374
Unchangedsince 1990
from 148,723 in 1990
from 35.0 in 1990
US average: 35.2
Population, 1990 – 2024
142K 144K 146K 148K 150K 1990 2000 2010 2020 2024 Rock Island County Age distribution, 2000
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $38,608
+9%inflation adjusted, since 1990
from $26,803 in 1990
US average: $42,589
from $13,214 in 1990
US average: $21,522
from 13.2% in 1990
US average: 12.4%
$77,800
+24%inflation adjusted, since 1990
from $47,600 in 1990
US average: $120,530
$450
+3%inflation adjusted, since 1990
from $331 in 1990
US average: $602
from 66.9% in 1990
30.3% rent
Section 04
Race & ethnicity 1990
White, non-Hispanic 89.7%(133,451)
Hispanic / Latino 5.2%(7,770)
2000
White, non-Hispanic 81.5%(121,705)
Hispanic / Latino 8.6%(12,791)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Detailed origin tables are available for 2024; showing 2024 data.
Hispanic origin
+ 4 more hispanic origin groups with data Asian origin
+ 1 more asian origin group with data Ancestry
+ 43 more ancestry groups with data from 15.0% in 1990
US average: 24.4%
High school or higher
from 77.4% in 1990
US average: 80.3%
from 4.5% in 1990
US average: 8.8%
Section 06
Commute & transportation from 16.1 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 28.4%(16,314)
Women 15+
Never married 22.1%(13,823)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Section 09
Health coverage Showing 2024 (the nearest year with coverage data).
from 10.8% in 2013
US average: 8.4%
from 60.0% in 2020
US average: 54.8%
Direct-purchase
from 11.5% in 2020
US average: 13.8%
from 20.5% in 2020
US average: 18.4%
from 21.7% in 2020
US average: 20.9%
VA health care
from 2.3% in 2020
US average: 2.2%
Any private
from 69.4% in 2020
US average: 67.1%
Any public
from 40.6% 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) 23.2%(1,818)
Gulf War (1990s) 20.2%(1,580)
Share of the 7,839 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 Rock Island County Head to head
Compare Rock Island County to nearby counties ROCK ISLAND COUNTY VS
Scott County
Income $78,277 +103%
Home value $222,000 +185%
Population 175,259 +24%
SEE FULL COMPARISON →
ROCK ISLAND COUNTY VS
Mercer County
Income $74,182 +92%
Home value $146,700 +89%
Population 15,229 −89%
SEE FULL COMPARISON →
ROCK ISLAND COUNTY VS
Henry County
Income $71,911 +86%
Home value $151,600 +95%
Population 48,095 −66%
SEE FULL COMPARISON →
ROCK ISLAND COUNTY VS
Muscatine County
Income $69,396 +80%
Home value $182,100 +134%
Population 41,853 −70%
SEE FULL COMPARISON →
Frequently asked
How many people live in Rock Island County, Illinois? Rock Island County, Illinois has about 149,374 residents according to the 2000 Census.
What is the median household income in Rock Island County, Illinois? The typical household in Rock Island County, Illinois earns about $38,608 a year. Half of households make more than that, and half make less.
Is Rock Island County, Illinois expensive? In Rock Island County, Illinois, the median home is worth about $77,800, and the typical rent is about $450 a month.
How educated are people in Rock Island County, Illinois? About 17.1% of adults age 25 and over in Rock Island County, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Rock Island County, Illinois? About 10.7% of people in Rock Island County, Illinois live below the federal poverty line.
Has Rock Island County, Illinois grown since 1990? Yes, Rock Island County, Illinois has grown since 1990. The population has added about 651 residents, a change of about 0 percent over that period.
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