Rock Island County, Illinois

Rock Island County, Illinois, had an estimated population of 141,869 in 2025 across 1,107 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among Illinois's counties and nationally.

Population: 141,869; 2025 estimate
Area: 1,107 km²
Density: 128; per km²
Median income: $67,159; household, ACS 2024
Median age: 40.3; years, ACS 2024

How Illinois's counties spread

Amenities & Infrastructure

Indicator	Value	In Illinois	In the US
Households with Broadband2024	90.5%	17 / 102	714 / 3,144
Median Gross Rent2024	$889	30 / 102	1,494 / 3,137
Median Home Value2024	$150,400	38 / 102	2,238 / 3,139
Owner-Occupied Homes2024	69.7%	90 / 102	2,275 / 3,144
Vacant Homes2024	7.5%	84 / 102	2,602 / 3,144

Demography

Indicator	Value	In Illinois	In the US
Aged 65 and Over2024	20.4%	54 / 102	1,414 / 3,144
American Indian & Alaska Native2024	0.1%	18 / 102	1,566 / 3,144
Asian, non-Hispanic2024	2.6%	13 / 102	396 / 3,144
Average Household Size2024people	2.2	86 / 102	2,685 / 3,144
Black, non-Hispanic2024	10.9%	15 / 102	711 / 3,144
Foreign-Born2024	8.7%	12 / 102	487 / 3,144
Hispanic or Latino2024	14.2%	12 / 102	622 / 3,144
Median Age2024years	40.3	77 / 102	1,938 / 3,144
Sex Ratio2024per 1,000 males	1,021	26 / 102	1,026 / 3,144
Speak a Language Other Than English2024	13.8%	13 / 102	654 / 3,144
Under 182024	22.5%	24 / 102	1,261 / 3,144
Veterans2024	7.1%	58 / 102	1,631 / 3,144
White, non-Hispanic2024	67.4%	90 / 102	2,145 / 3,144

Economy

Indicator	Value	In Illinois	In the US
Below Poverty Line2024	15.5%	22 / 102	1,096 / 3,144
Households on SNAP2024	15.9%	31 / 102	804 / 3,144
Income Inequality2024index	0.441	40 / 102	1,748 / 3,144
Median Household Income2024	$67,159	50 / 102	1,419 / 3,143
Per Capita Income2024	$36,842	46 / 102	1,277 / 3,144
Unemployment Rate2024	5.6%	21 / 102	799 / 3,144

Education

Indicator	Value	In Illinois	In the US
Bachelor's Degree or Higher2024	24.7%	31 / 102	1,228 / 3,144
High School or Higher2024	90.7%	66 / 102	1,440 / 3,144

Health Coverage

Indicator	Value	In Illinois	In the US
No Health Insurance2024	6.1%	23 / 102	2,101 / 3,144
With a Disability2024	15.4%	53 / 102	1,733 / 3,144

Population & Density

Indicator	Value	In Illinois	In the US
Population2025	141,869	15 / 102	478 / 3,144
Population Density2025/km²	128	11 / 102	399 / 3,144

Work & Commute

Indicator	Value	In Illinois	In the US
Commute by Public Transit2024	1.3%	9 / 102	298 / 3,144
Households with No Vehicle2024	8.6%	17 / 102	438 / 3,144
Mean Commute Time2024minutes	19.7	85 / 102	2,509 / 3,143
Work from Home2024	8.6%	43 / 102	1,578 / 3,144

Other counties of Illinois

Compare Rock Island County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.