Rock City, Illinois Population 2021

279
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Rock City is a city located in Stephenson County Illinois. With a 2020 population of 279, it is the 1034th largest city in Illinois and the 15579th largest city in the United States . Rock City is currently declining at a rate of -0.71% annually and its population has decreased by -11.43% since the most recent census, which recorded a population of 315 in 2010. Rock City reached it's highest population of in . Spanning over 0 miles, Rock City has a population density of 2,079 people per square mile.

The average household income in Rock City is $61,990 with a poverty rate of 8.98%. The median rental costs in recent years comes to $725 per month, and the median house value is $99,100. The median age in Rock City is 33.3 years, 32.6 years for males, and 37.3 years for females.

Rock City Demographics

According to the most recent ACS, the racial composition of Rock Citywas:

  • White: 91.33%
  • Native American: 7.43%
  • Two or more races: 1.24%
  • Black or African American: 0.00%
  • Asian: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
  • Other race: 0.00%
The current population of Rock City, Illinois is 279 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 283.The last official US Census in 2010 recorded the population at 315.

Rock City, Illinois Population 2021

Population by Race

Race Population Percentage
White29591.33%
American Indian and Alaska Native247.43%
Two or More Races41.24%
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Rock City Population by Race

Rock City Population Pyramid $2021

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Rock City Median Age

33.3


Total

32.6


Male

37.3


Female

Rock City Adults

There are 210 adults, (42 of whom are seniors) in Rock City.

Rock City Age Dependency

92.3

Age Dependency Ratio

25

Old Age Dependency Ratio

67.3

Child Dependency Ratio

Rock City Sex Ratio

Female

163

50.46%

Male

160

49.54%

Rock City Population by Age

Rock City Renter vs Owner Occupied by Household Type

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Rock City Household Types

Type Owner Renter
Male37.5%62.5%
Female37.5%62.5%
Non Family73.1%26.9%
All77.3%22.7%
Married95%5%

77.3%

Rate of Home Ownership

Rock City Households and Families

Type Count Average Size Owned
All1102.9477.3
Married603.795
Non Family261.2773.1
Female16337.5
Male82.537.5

3.45

Average Family Size

2.94

Average Household Size

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Rock City Households by Type

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Education Attained Count Percentage
Less Than 9th Grade31.53%
9th to 12th Grade52.55%
High School Graduate9648.98%
Some College3417.35%
Associates Degree2713.78%
Bachelors Degree178.67%
Graduate Degree147.14%
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Rock City Educational Attainment by Sex (over 25)

Rock City Educational Attainment by Race

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Race Total High School Bachelors
White19018231
Native American44
2+ Races22

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among white people with a rate of 16.32%.

Rock City Educational Attainment by Race

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Name Average Male Female
Overall$36,250$43,542$26,875
Less Than 9th Grade$$$
High School Graduate$32,188$34,375$30,417
Some College$41,250$63,125$35,625
Bachelors Degree$31,250$40,625$
Graduate Degree$$61,250$

$36,250

Average Earnings

$43,542

Average Male

$26,875

Average Female

Rock City Earnings by Educational Attainment

Rock City Language by Age

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Rock City Language

96.93% of Rock City residents speak only English, while 3.07% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.71% of the population.

Rock City Language

Rock City Poverty by Race

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Name Total In Poverty Poverty Rate
White295279.15%
Multiple4250.00%

8.98%

Overall Poverty Rate

11.25%

Male Poverty Rate

6.75%

Female Poverty Rate

Poverty in Rock City

The race most likely to be in poverty in Rock City is Multiple, with 50.00% below the poverty level.

The race least likely to be in poverty in Rock City is White, with 9.15% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.75%. Among those working part-time, it was 9.09%, and for those that did not work, the poverty rate was 15.15%.

Rock City Poverty

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Name Poverty
Some College13.11%
High School4.17%
Bachelors or Greater0.00%
Less Than 9th Grade0.00%

Rock City Poverty Rate by Education

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Rate Poverty
Male Employed4.88%
Female Employed3.17%
Female Unemployed0.00%
Male Unemployed0.00%

Rock City Poverty Rate by Employment Status and Sex

Rock City Income by Household Type

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Name Median Mean
Households$55,000$61,990
Families$55,357$65,174
Married Families$68,000-
Non Families$41,250$51,704
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Income by Household Type

Rock City Marital Status

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Marriage Rates

57.0%

Overall Marriage Rate

56.9%

Male Marriage Rate

57.0%

Female Marriage Rate

Rock City Married by Age and Sex

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Rock City Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 45-54.

Rock City Marital Status by Race

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Rock City Marital Status

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27

Number of Veterans

23

Male Veterans

4

Female Veterans

War Veterans
First Gulf War12
Second Gulf War10
Vietnam8
Korea4
World War II

Rock City Veterans by War

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Age Group Veterans
35 to 5411
65 to 748
75+4
55 to 642
18 to 342

Rock City Veterans by Age

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Name Veterans % of Total
White2311.27%
Native American4100.00%

Rock City Veterans by Race

Rock City Veterans by Education

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0.00%

Veteran Poverty Rate

7.41%

Veteran Disability Rate

Rock City Veterans by Education

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68.3%

Labor Force Participation

64.7%

Employment Rate

5.2%

Unemployment Rate

Rock City Employment by Age

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Rock City Employment by Race

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Rock City 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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69.04%

Born in Rock City

99.07%

Native Born

0.93%

Foreign Born

0.93%

Non Citizen

0.00%

Naturalized

Place of Birth

99.07% of Rock City residents were born in the United States, with 69.04% having been born in Illinois. 0.93% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Rock City Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
2021279-2-0.71%
2020281-2-0.71%
2019283-2-0.70%
2018285-3-1.04%
2017288-3-1.03%
2016291-1-0.34%
2015292-4-1.35%
2014296-2-0.67%
2013298-1-0.33%
2012299-3-0.99%
2011302-1-0.33%
20103030.00%

Rock City Population by Year