COUNTY
Rock Island County
Illinois · 141,869 residents (2025 est.) · 427 sq mi
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Part of the Davenport metro area
The short version
Rock Island County is home to 142,757 people in Illinois. The typical home is worth $150,400, having more than doubled since 2000. About 25% of adults have finished a four-year degree. Median rent is $889 a month. That trails the Illinois median by roughly 19%. The average commute runs 20 minutes.
At a glance
Lower income
median household income $67,159, below the US median
US median: $82,259
Mid-age
median age 40.3
US median: 38.9
Less educated
25% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Rock Island County
What changed most since 1990
- Median home value (2024 dollars)$114,243 → $150,400 (+32%)US over the same years: +67%
- Adults with a bachelor's degree15.0% → 24.7% (+9.7 pts)US over the same years: +15.3 pts
Among the 102 counties in Illinois
- 50th in household income$67,159
- 32nd in share with a bachelor's degree24.7%
- Tied for 38th in home value$150,400
- 11th in diversity score63.9
Section 01
Population & growth
142,757
−4%since 2000
from 149,374 in 2000
141,869 in 2025 (Census Bureau estimate)
1990 – 2025
Land area
427 sq mi
Population, 1990 – 2024
2024143K
Age distribution, 2024
Under 55.8%(8,232)
5 to 96.2%(8,832)
10 to 146.6%(9,381)
15 to 196.6%(9,438)
20 to 246.2%(8,842)
25 to 3412%(17,174)
35 to 4412.3%(17,505)
45 to 5411.4%(16,247)
55 to 6412.6%(18,045)
65 to 7411.8%(16,857)
75 to 846.1%(8,774)
85 and over2.4%(3,430)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$67,159
−5%inflation adjusted, since 2000
from $38,608 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
44.8%
+19.5 ptssince 2009
from 25.3% in 2009
US average: 53.3%
Workforce by industry, 2024
Retail trade15.6%
Information11.8%
Finance & insurance6.5%
Wholesale trade6.2%
Other services5.7%
Professional, scientific, technical5.7%
Public administration4.2%
Transportation & warehousing2.6%
Arts, entertainment, food1.5%
Agriculture, forestry, fishing0.9%
Construction0.9%
Education & health services0.9%
Manufacturing0%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$150,400
+6%inflation adjusted, since 2000
from $77,800 in 2000
US average: $376,019
1990 – 2024
2.2
−7%since 2009
from 2.4 in 2009
1990 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
20
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity
2000
White, non-Hispanic81.5%(121,705)
Black7.4%(11,099)
Hispanic / Latino8.6%(12,791)
Asian1%(1,499)
Other0%
2024
White, non-Hispanic67.4%(96,160)
Black10.9%(15,568)
Hispanic / Latino14.2%(20,305)
Asian2.6%(3,770)
Other4.9%(6,954)
64
+39%since 2009
from 46 in 2009
1990 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
30
−9%since 2020
from 33 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
Hispanic origin
Mexican12.3%(17,493)
Central American0.5%(657)
Puerto Rican0.4%(640)
South American0.3%(487)
Spaniard0.3%(365)
Guatemalan0.2%(355)
Honduran0.2%(229)
Cuban0.1%(152)
Colombian0.1%(152)
Ecuadorian0.1%(145)
Venezuelan0.1%(113)
Salvadoran0%(63)
+ 4 more hispanic origin groups with data
Asian origin
Asian Indian0.8%(1,137)
Burmese0.8%(1,123)
Filipino0.3%(405)
Kazakh0.2%(235)
Vietnamese0.1%(164)
Chinese0.1%(144)
Japanese0.1%(109)
Pakistani0.1%(103)
Laotian0.1%(95)
Korean0.1%(73)
Nepalese0%(52)
Taiwanese0%(24)
+ 1 more asian origin group with data
Thai0%(4)
Ancestry
German18.7%(26,754)
Irish10.6%(15,197)
English9.3%(13,246)
Swedish4.2%(5,948)
American3.5%(4,953)
Belgian3%(4,334)
Italian2.7%(3,811)
Subsaharan African2.1%(3,027)
Polish1.6%(2,281)
Scottish1.5%(2,204)
French1.3%(1,873)
Norwegian1.2%(1,775)
+ 43 more ancestry groups with data
Dutch1.1%(1,619)
Scotch-Irish0.6%(862)
Welsh0.6%(857)
Greek0.5%(683)
Danish0.4%(615)
Czech0.4%(506)
Russian0.3%(453)
French Canadian0.3%(360)
Arab0.2%(356)
Lithuanian0.2%(296)
British0.2%(279)
Swiss0.2%(249)
Croatian0.2%(221)
Moroccan0.1%(210)
Ukrainian0.1%(181)
Macedonian0.1%(176)
West Indian0.1%(157)
Hungarian0.1%(152)
Finnish0.1%(136)
Canadian0.1%(132)
Slovak0.1%(120)
Ethiopian0.1%(111)
Jamaican0.1%(107)
Austrian0.1%(91)
Serbian0%(67)
Nigerian0%(61)
Ghanaian0%(48)
Slovene0%(43)
Lebanese0%(38)
Kenyan0%(38)
Portuguese0%(37)
Romanian0%(36)
Syrian0%(28)
Turkish0%(28)
Brazilian0%(25)
Latvian0%(24)
Haitian0%(23)
Iranian0%(19)
Palestinian0%(16)
Australian0%(14)
Armenian0%(8)
Jordanian0%(6)
Bulgarian0%(6)
Section 05
Education
High school or higher
90.7%
+8.1 ptssince 2000
from 82.6% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Women 20-64 in the labor force
77.6%
+2.4 ptssince 2020
from 75.2% in 2020
US average: 74.6%
Section 08
People & community
Computer in household
94.9%
+3.9 ptssince 2020
from 91.0% in 2020
US average: 95.5%
Marital status
Men 15+
Never married36.1%(20,608)
Married50.2%(28,697)
Widowed3.5%(2,022)
Divorced10.2%(5,822)
Women 15+
Never married30.1%(17,793)
Married46.8%(27,667)
Widowed10.3%(6,072)
Divorced12.9%(7,631)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage
Direct-purchase
12.4%
+0.9 ptssince 2020
from 11.5% in 2020
US average: 13.8%
VA health care
2.5%
+0.2 ptssince 2020
from 2.3% in 2020
US average: 2.2%
Any private
67.1%
−2.3 ptssince 2020
from 69.4% in 2020
US average: 67.1%
Any public
41.6%
+1.0 ptssince 2020
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)
Vietnam era40%(3,134)
Korean War5.1%(396)
World War II1.6%(122)
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
Over time
Rock Island County, decade by decade
| Year | Population | Median household income | Median home value | Bachelor's degree+ | Diversity score |
|---|---|---|---|---|---|
| 1990 | 148,723 | $64,329 | $114,243 | 15.0% | 29.7 |
| 2000 | 149,374 | $70,330 | $141,725 | 17.1% | 40.4 |
| 2010 | 147,546 | $66,499 | $160,688 | 21.1% | 50.6 |
| 2020 | 144,672 | $67,850 | $149,202 | 23.8% | 63.8 |
| 2024 | 142,757 | $67,159 | $150,400 | 24.7% | 63.9 |
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
Drill deeper
Places similar to Rock Island County
Monroe County
Pop 143,345
Faulkner County
Pop 133,979
Warren County
Pop 149,375
Black Hawk County
Pop 131,532
Places similar to Rock Island CountyHead to head
Compare Rock Island County to nearby counties
ROCK ISLAND COUNTY VS
Scott County
Income$78,277+17%
Home value$222,000+48%
Population175,259+24%
SEE FULL COMPARISON →
ROCK ISLAND COUNTY VS
Mercer County
Income$74,182+10%
Home value$146,700−2%
Population15,229−89%
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ROCK ISLAND COUNTY VS
Henry County
Income$71,911+7%
Home value$151,600+1%
Population48,095−66%
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ROCK ISLAND COUNTY VS
Muscatine County
Income$69,396+3%
Home value$182,100+21%
Population41,853−70%
SEE FULL COMPARISON →
Frequently asked
How many people live in Rock Island County, Illinois?
Rock Island County, Illinois has about 142,757 residents according to the 2024 American Community Survey.
What is the median household income in Rock Island County, Illinois?
The typical household in Rock Island County, Illinois earns about $67,159 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 $150,400, and the typical rent is about $889 a month.
How educated are people in Rock Island County, Illinois?
About 24.7% 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 15.5% 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 shrunk since 1990. The population has lost about 5,966 residents, a change of about -4 percent over that period.
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43 census tracts (top 20 by population)
Census Tract 204Census Tract 228Census Tract 209Census Tract 232Census Tract 213Census Tract 241.02Census Tract 215Census Tract 203.01Census Tract 218Census Tract 208Census Tract 212Census Tract 211Census Tract 220Census Tract 240Census Tract 242Census Tract 241.03Census Tract 202Census Tract 201.02Census Tract 230Census Tract 21017 ZIP codes
ZIP 61265ZIP 61201ZIP 61244ZIP 61264ZIP 61282ZIP 61240ZIP 61275ZIP 61284ZIP 61256ZIP 61232ZIP 61239ZIP 61242ZIP 61259ZIP 61257ZIP 61278ZIP 61236ZIP 61237Up the hierarchy
All counties in IllinoisDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024