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 2025 population of 284 . Rock City is currently declining at a rate of -1.05% annually and its population has decreased by -4.05% since the most recent census, which recorded a population of 296 in 2020.

The average household income in Rock City is $79,311 with a poverty rate of 4.5%. The median age in Rock City is 32.2 years: 26.9 years for males, and 35.5 years for females. For every 100 females there are 93.8 males.

284
Total Population
2,096
Density (mi²)
-3 -1.05%
Growth

Rock City Population

Rock City Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Rock City includes 74.87% White, 8.73% other race, and smaller percentages for and multiracial populations.

Population by Race

White (74.87%)

Two or more races (16.4%)

Other race (8.73%)

Race
Population
Percentage (of total)
White28374.87%
Two or more races6216.4%
Other race338.73%

Rock City Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Rock City's average per capita income is $41,875. Household income levels show a median of $70,000. The poverty rate stands at 4.5%.

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$92,500-
Families$90,208$92,797
Households$70,000$79,311
Non Families$38,250$34,451

$41,875

Average Income

$70,000

Median Household Income

4.5%

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)