State
County
Land Area (mi²)
4.0 sq mi
Density (mi²)
2,160.80/sq mi
2020 Growth Rate
-0.77%
Growth Since 2010
-7.12%
Rank in State
Rank in Country
World Population Review
Rock Falls, Illinois Population 2021
8,606
Rock Falls is a city located in Whiteside County Illinois. With a 2020 population of 8,606, it is the 242nd largest city in Illinois and the 3427th largest city in the United States . Rock Falls is currently declining at a rate of -0.77% annually and its population has decreased by -7.12% since the most recent census, which recorded a population of 9,266 in 2010. Rock Falls reached it's highest population of 10,633 in 1980. Spanning over 4 miles, Rock Falls has a population density of 2,161 people per square mile.
The average household income in Rock Falls is $61,855 with a poverty rate of 15.81%. The median rental costs in recent years comes to $695 per month, and the median house value is $78,000. The median age in Rock Falls is 40.5 years, 37.3 years for males, and 42.6 years for females.
Rock Falls Demographics
According to the most recent ACS, the racial composition of Rock Falls was:
- White: 93.92%
- Black or African American: 2.66%
- Other race: 1.85%
- Two or more races: 1.07%
- Asian: 0.32%
- Native American: 0.17%
- Native Hawaiian or Pacific Islander: 0.00%
The current population of Rock Falls, Illinois is 8,606 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 8,807.The last official US Census in 2010 recorded the population at 9,266.
Rock Falls, Illinois Population 2021
| Race | Population | Percentage |
|---|---|---|
| White | 8,408 | 93.92% |
| Black or African American | 238 | 2.66% |
| Some Other Race | 166 | 1.85% |
| Two or More Races | 96 | 1.07% |
| Asian | 29 | 0.32% |
| American Indian and Alaska Native | 15 | 0.17% |
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Rock Falls Population by Race
Rock Falls Population Pyramid $2021
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Rock Falls Population by Age
Rock Falls Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 3,728 | 2.38 | 63.4 |
| Married | 1,528 | 3.21 | 79.3 |
| Non Family | 1,486 | 1.12 | 53.1 |
| Female | 554 | 3.31 | 47.7 |
| Male | 160 | 2.8 | 61.3 |
3.07
Average Family Size
2.38
Average Household Size
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Rock Falls Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 299 | 4.97% |
| 9th to 12th Grade | 413 | 6.87% |
| High School Graduate | 2,602 | 43.28% |
| Some College | 1,440 | 23.95% |
| Associates Degree | 611 | 10.16% |
| Bachelors Degree | 456 | 7.58% |
| Graduate Degree | 191 | 3.18% |
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Rock Falls Educational Attainment by Sex (over 25)
Rock Falls Educational Attainment by Race
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| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 5,036 | 4,528 | 589 |
| Hispanic | 831 | 646 | 52 |
| Other Race | 157 | 119 | 11 |
| Black | 130 | 121 | 6 |
| 2+ Races | 24 | 14 | |
| Native American | 15 |
The highest rate of high school graduation is among black people with a rate of 93.08%.
The highest rate of bachelors degrees is among white people with a rate of 11.70%.
Rock Falls Educational Attainment by Race
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$27,875
Average Earnings
$36,077
Average Male
$23,637
Average Female
Rock Falls Earnings by Educational Attainment
Rock Falls Language by Age
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Rock Falls Language
90.86% of Rock Falls residents speak only English, while 9.14% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.24% of the population.
Rock Falls Language
Rock Falls Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 7,139 | 1,136 | 15.91% |
| Hispanic | 1,492 | 186 | 12.47% |
| Black | 215 | 71 | 33.02% |
| Multiple | 96 | 62 | 64.58% |
15.81%
Overall Poverty Rate
13.31%
Male Poverty Rate
18.17%
Female Poverty Rate
Poverty in Rock Falls
The race most likely to be in poverty in Rock Falls is Multiple, with 64.58% below the poverty level.
The race least likely to be in poverty in Rock Falls is Hispanic, with 12.47% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 4.01%. Among those working part-time, it was 19.58%, and for those that did not work, the poverty rate was 18.65%.
Rock Falls Poverty
Rock Falls Poverty Rate by Education
Rock Falls Marital Status
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Marriage Rates
44.0%
Overall Marriage Rate
43.4%
Male Marriage Rate
44.5%
Female Marriage Rate
Rock Falls Married by Age and Sex
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Rock Falls 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 45-54.
Rock Falls Marital Status by Race
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Rock Falls Marital Status
Rock Falls Veterans by War
Rock Falls Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 618 | 9.51% |
| Hispanic | 156 | 15.60% |
| Black | 69 | 51.88% |
| Other Race | 67 | 42.68% |
| Native American | 6 | 40.00% |
Rock Falls Veterans by Race
Rock Falls Veterans by Education
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10.29%
Veteran Poverty Rate
21.12%
Veteran Disability Rate
Rock Falls Veterans by Education
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65.4%
Labor Force Participation
61%
Employment Rate
6.6%
Unemployment Rate
Rock Falls Employment by Age
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Rock Falls Employment by Race
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Rock Falls 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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96.92%
Native Born
3.08%
Foreign Born
1.71%
Non Citizen
1.37%
Naturalized
Place of Birth
96.92% of Rock Falls residents were born in the United States, with 84.34% having been born in Illinois. 1.71% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.
Rock Falls Place of Birth
| Year | Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2021 | 8,606 | -67 | -0.77% |
| 2020 | 8,673 | -67 | -0.77% |
| 2019 | 8,740 | -67 | -0.76% |
| 2018 | 8,807 | -81 | -0.91% |
| 2017 | 8,888 | -90 | -1.00% |
| 2016 | 8,978 | -83 | -0.92% |
| 2015 | 9,061 | -24 | -0.26% |
| 2014 | 9,085 | -115 | -1.25% |
| 2013 | 9,200 | -60 | -0.65% |
| 2012 | 9,260 | -98 | -1.05% |
| 2011 | 9,358 | -40 | -0.43% |
| 2010 | 9,398 | -182 | -0.19% |
| 2000 | 9,580 | -74 | -0.08% |
| 1990 | 9,654 | -979 | -0.96% |
| 1980 | 10,633 | 346 | 0.33% |
| 1970 | 10,287 | 26 | 0.03% |
| 1960 | 10,261 | 2,278 | 2.54% |
| 1950 | 7,983 | 2,996 | 4.82% |
| 1940 | 4,987 | 1,094 | 2.51% |
| 1930 | 3,893 | 966 | 2.89% |
| 1920 | 2,927 | 270 | 0.97% |
| 1910 | 2,657 | 0.00% |