Janesville Flag

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 Rock County. 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.

66.4K
Total Population
1,929
Density (mi²)
144 0.22%
Growth

Janesville Population

Janesville Population

Data after 2023 is projected based on recent change

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

Race
Population
Percentage (of total)
White57,12186.79%
Two or more races3,6905.61%
Black or African American2,1123.21%
Other race1,5732.39%
Asian1,0721.63%
Native American2370.36%
Native Hawaiian or Pacific Islander80.01%

Janesville Marital Status

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

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

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)