COUNTY
Rock Island County
Illinois · 141,869 residents (2025 est.) · 427.496 sq mi
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Part of the Davenport metro area
The short version
Rock Island County has lower-than-average household income, with a median household income of $67,159. Population has declined 4% since 2000. Median home value has more than doubled since 2000, reaching $150,400.
At a glance
Lower income
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
Section 01
Population & growth
PEP 2025 EST:141,869 residents (Census Bureau Vintage 2025, released March 2026)
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
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
20
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in Rock Island County on RentDataNow
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
2009 – 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
Section 08
People & community
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
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Compare Rock Island County to nearby counties
ROCK ISLAND COUNTY VS
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Income$78,277+17%
Home value$222,000+48%
Population175,259+24%
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ROCK ISLAND COUNTY VS
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Income$74,182+10%
Home value$146,700−2%
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ROCK ISLAND COUNTY VS
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ROCK ISLAND COUNTY VS
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Income$69,396+3%
Home value$182,100+21%
Population41,853−70%
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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