Rock Falls, Illinois Population 2021

8,606
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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

Population by Race

Race Population Percentage
White8,40893.92%
Black or African American2382.66%
Some Other Race1661.85%
Two or More Races961.07%
Asian290.32%
American Indian and Alaska Native150.17%
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Rock Falls Population by Race

Rock Falls Population Pyramid $2021

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Rock Falls Median Age

40.5


Total

37.3


Male

42.6


Female

Rock Falls Adults

There are 6,862 adults, (1,603 of whom are seniors) in Rock Falls.

Rock Falls Age Dependency

70.2

Age Dependency Ratio

30.5

Old Age Dependency Ratio

39.7

Child Dependency Ratio

Rock Falls Sex Ratio

Female

4,598

51.36%

Male

4,354

48.64%

Rock Falls Population by Age

Rock Falls Renter vs Owner Occupied by Household Type

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Rock Falls Household Types

Type Owner Renter
Married79.3%20.7%
All63.4%36.6%
Male61.3%38.8%
Non Family53.1%46.9%
Female47.7%52.3%

63.4%

Rate of Home Ownership

Rock Falls Households and Families

Type Count Average Size Owned
All3,7282.3863.4
Married1,5283.2179.3
Non Family1,4861.1253.1
Female5543.3147.7
Male1602.861.3

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 Grade2994.97%
9th to 12th Grade4136.87%
High School Graduate2,60243.28%
Some College1,44023.95%
Associates Degree61110.16%
Bachelors Degree4567.58%
Graduate Degree1913.18%
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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
White5,0364,528589
Hispanic83164652
Other Race15711911
Black1301216
2+ Races2414
Native American15

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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Name Average Male Female
Overall$27,875$36,077$23,637
Less Than 9th Grade$28,438$35,000$22,375
High School Graduate$27,239$31,178$25,000
Some College$22,770$39,449$19,929
Bachelors Degree$40,488$31,944$49,375
Graduate Degree$75,662$$76,029

$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
White7,1391,13615.91%
Hispanic1,49218612.47%
Black2157133.02%
Multiple966264.58%

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

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Name Poverty
High School18.00%
Less Than 9th Grade14.86%
Some College8.34%
Bachelors or Greater3.63%

Rock Falls Poverty Rate by Education

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Rate Poverty
Male Unemployed28.96%
Female Unemployed16.13%
Female Employed11.06%
Male Employed9.09%

Rock Falls Poverty Rate by Employment Status and Sex

Rock Falls Income by Household Type

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Name Median Mean
Households$49,191$61,855
Families$57,917$71,298
Married Families$70,149-
Non Families$31,667$43,970
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Income by Household Type

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

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760

Number of Veterans

735

Male Veterans

25

Female Veterans

War Veterans
Second Gulf War217
Vietnam179
First Gulf War72
Korea57
World War II37

Rock Falls Veterans by War

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Age Group Veterans
35 to 54179
65 to 74157
75+156
55 to 64150
18 to 34118

Rock Falls Veterans by Age

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Name Veterans % of Total
White6189.51%
Hispanic15615.60%
Black6951.88%
Other Race6742.68%
Native American640.00%

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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84.34%

Born in Rock Falls

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
20218,606-67-0.77%
20208,673-67-0.77%
20198,740-67-0.76%
20188,807-81-0.91%
20178,888-90-1.00%
20168,978-83-0.92%
20159,061-24-0.26%
20149,085-115-1.25%
20139,200-60-0.65%
20129,260-98-1.05%
20119,358-40-0.43%
20109,398-182-0.19%
20009,580-74-0.08%
19909,654-979-0.96%
198010,6333460.33%
197010,287260.03%
196010,2612,2782.54%
19507,9832,9964.82%
19404,9871,0942.51%
19303,8939662.89%
19202,9272700.97%
19102,6570.00%

Rock Falls Population by Year