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 and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	1,003	99.11%
Two or more races	7	0.69%
Other race	2	0.2%

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