State
County
Land Area (mi²)
16.9 sq mi
Density (mi²)
2,173.30/sq mi
2020 Growth Rate
-0.69%
Growth Since 2010
-6.03%
Rank in State
Rank in Country
Metro Population
377,428
World Population Review
Rock Island, Illinois Population 2021
36,666
Rock Island is a city located in Rock Island County Illinois. It is also the county seat of Rock Island County. With a 2020 population of 36,666, it is the 49th largest city in Illinois and the 1071st largest city in the United States . Rock Island is currently declining at a rate of -0.69% annually and its population has decreased by -6.03% since the most recent census, which recorded a population of 39,018 in 2010. Rock Island reached it's highest population of 51,863 in 1960. Spanning over 17 miles, Rock Island has a population density of 2,173 people per square mile.
The average household income in Rock Island is $62,049 with a poverty rate of 21.09%. The median rental costs in recent years comes to $729 per month, and the median house value is $104,600. The median age in Rock Island is 36 years, 34.8 years for males, and 37.2 years for females.
Rock Island Demographics
According to the most recent ACS, the racial composition of Rock Island was:
- White: 69.49%
- Black or African American: 20.41%
- Asian: 4.11%
- Two or more races: 3.91%
- Other race: 1.46%
- Native American: 0.50%
- Native Hawaiian or Pacific Islander: 0.11%
The current population of Rock Island, Illinois is 36,666 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 37,431.The last official US Census in 2010 recorded the population at 39,018.
Rock Island, Illinois Population 2021
2019 and 2020 population is estimated by projecting the raw 2018 numbers.
| Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2021 | 377,428 | -872 | -0.23% |
| 2020 | 378,300 | -872 | -0.23% |
| 2019 | 379,172 | -872 | -0.23% |
| 2018 | 380,044 | -1,059 | -0.28% |
| 2017 | 381,103 | -1,075 | -0.28% |
| 2016 | 382,178 | -1,203 | -0.31% |
| 2015 | 383,381 | -689 | -0.18% |
| 2014 | 384,070 | 227 | 0.06% |
| 2013 | 383,843 | 1,412 | 0.37% |
| 2012 | 382,431 | 1,746 | 0.46% |
| 2011 | 380,685 | 942 | 0.25% |
| 2010 | 379,743 | 0.00% |
Rock Island Metro Area Population by Year
| Race | Population | Percentage |
|---|---|---|
| White | 26,484 | 69.49% |
| Black or African American | 7,779 | 20.41% |
| Asian | 1,565 | 4.11% |
| Two or More Races | 1,492 | 3.91% |
| Some Other Race | 557 | 1.46% |
| American Indian and Alaska Native | 191 | 0.50% |
| Native Hawaiian and Other Pacific Islander | 43 | 0.11% |
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Rock Island Population by Race
Rock Island Population Pyramid $2021
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Rock Island Population by Age
Rock Island Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 15,551 | 2.26 | 61.3 |
| Non Family | 6,528 | 1.22 | 54 |
| Married | 5,723 | 2.93 | 79.6 |
| Female | 2,511 | 3.2 | 39.9 |
| Male | 789 | 3.05 | 56.9 |
2.94
Average Family Size
2.26
Average Household Size
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Rock Island Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 1,114 | 4.59% |
| 9th to 12th Grade | 2,104 | 8.67% |
| High School Graduate | 6,760 | 27.85% |
| Some College | 6,498 | 26.77% |
| Associates Degree | 2,296 | 9.46% |
| Bachelors Degree | 3,639 | 14.99% |
| Graduate Degree | 1,862 | 7.67% |
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Rock Island Educational Attainment by Sex (over 25)
Rock Island Educational Attainment by Race
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| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 16,791 | 15,628 | 4,627 |
| Black | 4,249 | 3,174 | 401 |
| Hispanic | 1,973 | 1,391 | 252 |
| Asian | 762 | 435 | 130 |
| 2+ Races | 438 | 371 | 65 |
| Other Race | 314 | 205 | 50 |
| Native American | 172 | 153 | 15 |
| Islander | 11 | 11 |
The highest rate of high school graduation is among islander people with a rate of 100.00%.
The highest rate of bachelors degrees is among white people with a rate of 27.56%.
Rock Island Educational Attainment by Race
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$35,304
Average Earnings
$41,526
Average Male
$30,969
Average Female
Rock Island Earnings by Educational Attainment
Rock Island Language by Age
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Rock Island Language
86.06% of Rock Island residents speak only English, while 13.94% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.45% of the population.
Rock Island Language
Rock Island Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 21,640 | 2,915 | 13.47% |
| Black | 7,476 | 2,809 | 37.57% |
| Hispanic | 3,946 | 876 | 22.20% |
| Multiple | 1,386 | 556 | 40.12% |
| Asian | 1,366 | 448 | 32.80% |
| Other | 547 | 200 | 36.56% |
| Native | 185 | 32 | 17.30% |
| Islander | 43 | 27 | 62.79% |
21.09%
Overall Poverty Rate
18.50%
Male Poverty Rate
23.52%
Female Poverty Rate
Poverty in Rock Island
The race most likely to be in poverty in Rock Island is Islander, with 62.79% below the poverty level.
The race least likely to be in poverty in Rock Island is White, with 13.47% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 4.12%. Among those working part-time, it was 25.66%, and for those that did not work, the poverty rate was 27.03%.
Rock Island Poverty
Rock Island Poverty Rate by Education
Rock Island Marital Status
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Marriage Rates
38.9%
Overall Marriage Rate
39.4%
Male Marriage Rate
38.4%
Female Marriage Rate
Rock Island Married by Age and Sex
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Rock Island Marriage
The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.
Rock Island Marital Status by Race
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Rock Island Marital Status
Rock Island Veterans by War
Rock Island Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 2,015 | 9.08% |
| Black | 274 | 5.28% |
| Hispanic | 69 | 2.59% |
| 2+ Races | 34 | 4.65% |
| Native American | 13 | 7.10% |
| Asian | 12 | 1.10% |
Rock Island Veterans by Race
Rock Island Veterans by Education
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9.04%
Veteran Poverty Rate
28.75%
Veteran Disability Rate
Rock Island Veterans by Education
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63.6%
Labor Force Participation
58.5%
Employment Rate
7.9%
Unemployment Rate
Rock Island Employment by Age
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Rock Island Employment by Race
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Rock Island Employment by Education
Origin of Non-Citizens
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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Origin of Naturalized Citizens
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90.00%
Native Born
10.00%
Foreign Born
6.07%
Non Citizen
3.93%
Naturalized
Place of Birth
90.00% of Rock Island residents were born in the United States, with 61.34% having been born in Illinois. 6.07% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.
Rock Island Place of Birth
| Year | Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2021 | 36,666 | -255 | -0.69% |
| 2020 | 36,921 | -255 | -0.69% |
| 2019 | 37,176 | -255 | -0.68% |
| 2018 | 37,431 | -381 | -1.01% |
| 2017 | 37,812 | -348 | -0.91% |
| 2016 | 38,160 | -370 | -0.96% |
| 2015 | 38,530 | -248 | -0.64% |
| 2014 | 38,778 | -118 | -0.30% |
| 2013 | 38,896 | -36 | -0.09% |
| 2012 | 38,932 | -47 | -0.12% |
| 2011 | 38,979 | 1 | 0.00% |
| 2010 | 38,978 | -706 | -0.18% |
| 2000 | 39,684 | -868 | -0.22% |
| 1990 | 40,552 | -6,269 | -1.43% |
| 1980 | 46,821 | -3,345 | -0.69% |
| 1970 | 50,166 | -1,697 | -0.33% |
| 1960 | 51,863 | 3,153 | 0.63% |
| 1950 | 48,710 | 5,935 | 1.31% |
| 1940 | 42,775 | 4,822 | 1.20% |
| 1930 | 37,953 | 2,776 | 0.76% |
| 1920 | 35,177 | 10,842 | 3.75% |
| 1910 | 24,335 | 4,842 | 2.24% |
| 1900 | 19,493 | 5,859 | 3.64% |
| 1890 | 13,634 | 1,975 | 1.58% |
| 1880 | 11,659 | 3,769 | 3.98% |
| 1870 | 7,890 | 2,760 | 4.40% |
| 1860 | 5,130 | 0.00% |