Rock Falls

County:: Whiteside County
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.

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)
White	7,180	82.69%
Two or more races	1,090	12.55%
Other race	351	4.04%
Black or African American	37	0.43%
Native American	23	0.26%
Asian	2	0.02%

Rock Falls Marital Status

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