Rock City Flag

Rock City

County Seat:
No
Area (mi²):
0.136
State:
Illinois

Rock City is a village located in Stephenson County, Illinois. Rock City has a 2026 population of 282. Rock City is currently declining at a rate of -0.7% annually and its population has decreased by -4.73% since the most recent census, which recorded a population of 296 in 2020.

The median household income in Rock City is $68,125 with a poverty rate of 4.54%. The median age in Rock City is 26.8 years: 28.2 years for males, and 20.7 years for females. For every 100 females there are 80.7 males.

282
Total Population
2,081
Density (mi²)
-2 -0.7%
Growth

Rock City Population

Rock City Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026282-2-0.7%
2025284-3-1.05%
202428710.35%
2023286-5-1.72%
2022291-2-0.68%
2021293-3-1.01%
2020296-1-0.34%
2019282-2-0.7%
2018284-4-1.39%
2017288-3-1.03%
2016291-1-0.34%
2015292-4-1.35%
2014296-2-0.67%
2013298-1-0.33%
2012299-3-0.99%
2011302-13-4.13%
2010303-1-0.33%

Median Age

Overall: 26.8 years
Female: 20.7 years
Male: 28.2 years

Rock City Adults

There are 274 adults, (62 of whom are seniors) in Rock City.

Sex Ratio

Female: 244 (55.3%)
Male: 197 (44.7%)

Demographics

The racial composition of Rock City includes 64.17% White, 9.07% other race, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White28364.17%
Two or more races11826.76%
Other race409.07%
Race
Population ↓
Percentage (of total)
Two or more races10624.04%
Other race409.07%
Race
Population ↓
Percentage (of total)
White28364.17%
Two or more races122.72%

Rock City Marital Status

Economics and Income Statistics

Rock City 's average per capita income is $45,000. Household income levels show a median of $68,125. The poverty rate stands at 4.54%.

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$93,906-
Families$84,688$94,667
Households$68,125$75,053
Non Families$31,563$31,276

$45,000

Average Income

$68,125

Median Household Income

4.54%

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)