Rock Falls Flag

Rock Falls

County Seat:
No
Area (mi²):
3.983
State:
Illinois

Rock Falls is a city located in Whiteside County, Illinois. Rock Falls has a 2025 population of 8,487. Rock Falls is currently declining at a rate of -0.66% annually and its population has decreased by -3.22% since the most recent census, which recorded a population of 8,769 in 2020.

The average household income in Rock Falls is $67,324 with a poverty rate of 22.72%.The median age in Rock Falls is 39.9 years: 39.4 years for males, and 40.3 years for females.

8.5K
Total Population
2,131
Density (mi²)
-56 -0.66%
Growth

Rock Falls Population

Rock Falls Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Rock Falls includes 82.69% White, 4.04% other race, and smaller percentages for Black or African American, Native American, Asian and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White7,18082.69%
Two or more races1,09012.55%
Other race3514.04%
Black or African American370.43%
Native American230.26%
Asian20.02%

Rock Falls Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Rock Falls' average per capita income is $43,712. Household income levels show a median of $48,733. The poverty rate stands at 22.72%.

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$88,796-
Families$59,365$83,421
Households$48,733$67,324
Non Families$33,851$41,151

$43,712

Average Income

$48,733

Median Household Income

22.72%

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)