Janesville

County:: Rock County
County Seat:: Yes
Area (mi²):: 34.424
State:: Wisconsin

Janesville is a city located in Rock County, Wisconsin. Janesville has a 2025 population of 66,390. It is also the county seat of .Janesville is currently growing at a rate of 0.22% annually and its population has increased by 1.1% since the most recent census, which recorded a population of 65,670 in 2020.

The average household income in Janesville is $83,687 with a poverty rate of 9.61%. The median age in Janesville is 40 years: 37.9 years for males, and 42.2 years for females.

Demographics

The racial composition of Janesville includes 86.79% White, 3.21% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	57,121	86.79%
Two or more races	3,690	5.61%
Black or African American	2,112	3.21%
Other race	1,573	2.39%
Asian	1,072	1.63%
Native American	237	0.36%
Native Hawaiian or Pacific Islander	8	0.01%

Janesville Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Janesville's average per capita income is $47,444. Household income levels show a median of $71,664. The poverty rate stands at 9.61%.

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	$97,926	-
Families	$85,674	$96,947
Households	$71,664	$83,687
Non Families	$44,520	$57,791

$47,444

Average Income

$71,664

Median Household Income

9.61%

Poverty Rate