Rock Island Flag

Rock Island

County Seat:
Yes
Area (mi²):
16.871
State:
Illinois

Rock Island is a city located in Rock Island County, Illinois. Rock Island has a 2025 population of 36,290 . It is also the county seat of Rock Island County . Rock Island is currently declining at a rate of -0.4% annually and its population has decreased by -1.95% since the most recent census, which recorded a population of 37,010 in 2020.

The average household income in Rock Island is $75,802 with a poverty rate of 20.95%. The median age in Rock Island is 37.1 years: 35.3 years for males, and 37.6 years for females. For every 100 females there are 98.3 males.

36.3K
Total Population
2,151
Density (mi²)
-144 -0.4%
Growth

Rock Island Population

Rock Island Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Rock Island includes 68.02% White, 16.43% Black or African American, 3.79% other race, 3.39% Asian, and smaller percentages for Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

White (68.02%)

Black or African American (16.43%)

Two or more races (7.63%)

Other race (3.79%)

Asian (3.39%)

Native Hawaiian or Pacific Islander (0.44%)

Native American (0.31%)

Race
Population
Percentage (of total)
White25,00368.02%
Black or African American6,03816.43%
Two or more races2,8047.63%
Other race1,3923.79%
Asian1,2473.39%
Native Hawaiian or Pacific Islander1610.44%
Native American1130.31%

Rock Island Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Rock Island's average per capita income is $43,653. Household income levels show a median of $57,292. The poverty rate stands at 20.95%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$92,420-
Families$78,234$98,274
Households$57,292$75,802
Non Families$37,673$49,123

$43,653

Average Income

$57,292

Median Household Income

20.95%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)