Janesville

County:: Bremer County
County Seat:: No
Area (mi²):: 1.39
State:: Iowa

Janesville is a city located in Bremer County, Iowa. Janesville has a 2025 population of 1,057. Janesville is currently growing at a rate of 0.28% annually and its population has increased by 1.54% since the most recent census, which recorded a population of 1,041 in 2020.

The average household income in Janesville is $93,921 with a poverty rate of 5.75%. The median age in Janesville is 44.7 years: 44 years for males, and 45.3 years for females.

Demographics

The racial composition of Janesville includes 99.11% White, and smaller percentages for Two or more races, other race, Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	1,003	99.11%
Two or more races	7	0.69%
Other race	2	0.2%
Black or African American	0	0%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

Janesville Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Janesville's average per capita income is $57,574. Household income levels show a median of $84,231. The poverty rate stands at 5.75%.

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
Families	$110,139	$112,865
Married Families	$110,139	-
Households	$84,231	$93,921
Non Families	$41,750	$46,143

$57,574

Average Income

$84,231

Median Household Income

5.75%

Poverty Rate