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 2026 population of 8,535. Rock Falls is currently declining at a rate of -0.45% annually and its population has decreased by -2.69% since the most recent census, which recorded a population of 8,771 in 2020.

The median household income in Rock Falls is $49,600 with a poverty rate of 25.62%. The median age in Rock Falls is 37.7 years: 37.7 years for males, and 38 years for females. For every 100 females there are 97.9 males.

8.5K
Total Population
2,143
Density (mi²)
-39 -0.45%
Growth

Rock Falls Population

Rock Falls Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20268,535-39-0.45%
20258,574-40-0.46%
20248,61410.01%
20238,61330.03%
20228,610-116-1.33%
20218,726-45-0.51%
20208,771-21-0.24%
20198,746-53-0.6%
20188,799-96-1.08%
20178,895-85-0.95%
20168,980-81-0.89%
20159,061-22-0.24%
20149,083-116-1.26%
20139,199-59-0.64%
20129,258-95-1.02%
20119,353-41-0.44%
20109,3941281.38%
20009,580-74-0.77%
19909,654-979-9.21%
198010,6333463.36%
197010,287260.25%
196010,2612,27828.54%
19507,9832,99660.08%
19404,9871,09428.1%
19303,89396633%
19202,92727010.16%
19102,65700%

Median Age

Overall: 37.7 years
Female: 38 years
Male: 37.7 years

Rock Falls Adults

There are 6,547 adults, (1,675 of whom are seniors) in Rock Falls.

Sex Ratio

Female: 4,339 (50.5%)
Male: 4,248 (49.5%)

Demographics

The racial composition of Rock Falls includes 79.27% White, 4.2% other race, and smaller percentages for Native American, Black or African American, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White6,80779.27%
Two or more races1,26314.71%
Other race3614.2%
Native American1151.34%
Black or African American360.42%
Asian50.06%
Race
Population ↓
Percentage (of total)
Two or more races1,03212.02%
White4164.84%
Other race3163.68%
Native American991.15%
Race
Population ↓
Percentage (of total)
White6,39174.43%
Two or more races2312.69%
Other race450.52%
Black or African American360.42%
Native American160.19%
Asian50.06%

Rock Falls Marital Status

Economics and Income Statistics

Rock Falls ' average per capita income is $44,143. Household income levels show a median of $49,600. The poverty rate stands at 25.62%.

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$96,779-
Families$64,575$86,846
Households$49,600$71,794
Non Families$33,773$47,049

$44,143

Average Income

$49,600

Median Household Income

25.62%

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)