Janesville City, WI demographics:
population, income, and more

Total population
66,030
0.3% year-over-year change
Median household income
$73,446/yr
2.5% year-over-year change
Housing units
29,330
0.6% year-over-year change

Janesville population

How many people live in Janesville

Janesville is home to 66,030 residents, according to the most recent Census data. Gender-wise, 49.1% of Janesville locals are male, and 50.9% are female.

Total population
66,030
0.3% year-over-year change
Gender ratio
Male
49.1%
32,449
Female
50.9%
33,581
Value Percent YoY change
Male 32,449 49.1% -0.6%
Female 33,581 50.9% 1.2%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Janesville is 41, with the population distributed as follows: about 17.2% are children under 15, then 12.4% are in the 15 to 24 age group. Adults between 25 and 44 make up 26.3% of the population, while another 25.8% fall into the 45 to 64 bracket. Finally, around 18.2% are 65 or older.

Median age
40.7
Age breakdown
Under 15
17.2%
15 to 24
12.4%
25 to 44
26.3%
45 to 64
25.8%
Over 65
18.2%
Value Percent YoY change
Under 15 11,391 17.2% -1.2%
15 to 24 8,215 12.4% 2.0%
25 to 44 17,363 26.3% -0.7%
45 to 64 17,029 25.8% -0.9%
Over 65 12,032 18.2% 4.0%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Janesville, 95.6% of the population are US-born citizens, while 2.3% have gained naturalized citizenship. At the same time, 2.1% of residents are non-citizens. As for race, 85.2% of locals are Caucasian, 3.1% are African American and 1.6% have Asian roots. There’s also a share of 7.2% that includes residents with two or more races.

Citizenship
U.S.-born citizens
95.6%
Non-U.S.-born citizens
2.3%
Non-citizens
2.1%
Value Percent YoY change
U.S.-born citizens 63,123 95.6% 0.0%
Non-U.S.-born citizens 1,507 2.3% 4.6%
Non-citizens 1,400 2.1% 11.6%
Racial breakdown
White
85.2%
Black or African American
3.1%
American Indian and Alaska Native
0.4%
Asian
1.6%
Native Hawaiian and other Pacific Islander
0%
Two or more races
7.2%
Other
2.6%
Value Percent
White 56,276 85.2%
Black or African American 2,020 3.1%
American Indian and Alaska Native 239 0.4%
Asian 1,038 1.6%
Native Hawaiian and other Pacific Islander 9 0%
Two or more races 4,724 7.2%
Other 1,724 2.6%

Households in Janesville

A peek inside Janesville households

Janesville has 28,326 households, with an average of 2 members in each. Of these, 60.7% are families, while the remaining 39.3% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
28,326
0.9% year-over-year change
Average people per household
2
Non-family households
11,120
Family households
17,206
Value Percent YoY change
Non-family households 11,120 39.3% 0.8%
Family households 17,206 60.7% 1.0%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Janesville

The housing landscape of Janesville

Janesville's housing consists of 29,330 units, with 67.8% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 6.6% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 2.1% of the housing landscape.

Housing units
29,330
0.6% year-over-year change
Housing types
Value Percent
1 unit, detached 19,873 67.8%
1 unit, attached 1,935 6.6%
2 units 1,563 5.3%
3 or 4 units 790 2.7%
5 to 9 units 2,045 7%
10 to 19 units 589 2%
20 to 49 units 899 3.1%
50 or more units 1,019 3.5%
Mobile home 605 2.1%
Boat, RV, van, etc. 12 0%
Homes built since 2020
382
81.0% year-over-year change

The age of buildings in Janesville

In Janesville, the median construction year is 1972. About 14.2% of homes were built before the 1940s, with another 5.5% going up by 1949. Most development happened in the second half of the 20th century. Then, 10.1% of homes were added from 2000 to 2009, 3.8% between 2010 and 2019, and 1.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 4,173 14.2% -1.4%
Built between 1940 and 1949 1,604 5.5% -2.5%
Built between 1950 and 1959 3,024 10.3% 5.4%
Built between 1960 and 1969 4,730 16.1% -2.6%
Built between 1970 and 1979 4,864 16.6% 0.5%
Built between 1980 and 1989 2,939 10% -4.8%
Built between 1990 and 1999 3,535 12% -9.7%
Built between 2000 and 2009 2,950 10.1% 15.8%
Built between 2010 and 2019 1,129 3.8% 16.1%
Built in 2020 or later 382 1.3% 81.0%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Janesville occupancy rates

Out of the 28,326 occupied housing units in Janesville, 67.3% are owner-occupied, while 32.7% are lived in by tenants. Meanwhile, 3.4% of all homes on the local market sit vacant.

Occupied housing units
28,326
0.9% year-over-year change
Occupancy breakdown
Renter occupied
9,257
Owner occupied
19,069
Value Percent YoY
change
Renter occupied 9,257 32.7% -1.5%
Owner occupied 19,069 67.3% 2.2%
Unoccupied housing units
3.4%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Janesville housing costs

Housing costs in Janesville come to a median of $1,123 per month, while tenants specifically pay a median gross rent of $1,054.

Median housing costs per month
$1,123/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Janesville
$1,054/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Janesville

Janesville education at a glance

About 37.9% of the population in Janesville went to high school, while 24% pursued college studies. Another 11.4% earned an associate degree and 17.4% hold a bachelor’s. Meanwhile, 7.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 867 1.7% 1.8%
High school diploma 19,728 37.9% 1.7%
College diploma 12,491 24% -2.2%
Associate degree 5,942 11.4% -0.4%
Bachelor's degree 9,047 17.4% 1.1%
Graduate degree 3,934 7.6% 3.0%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Janesville

How much people earn in Janesville

The average annual household income in Janesville was $85,681 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +2.4% change from the previous year. At the same time, the median income stood at $73,446, reflecting a +2.5% shift over the same period.

Average household income in Janesville
$85,681/year
2.4% year-over-year change
Median household income in Janesville
$73,446/year
2.5% year-over-year change

Janesville income by age

In Janesville, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $79,634. Those with someone between 45 and 64 in charge, often well established professionally, earn $83,248 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $59,457, while those led by someone over 65, many of whom may be retired, have about $56,745 in earnings. Overall, 90.9% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $59,457 -6.2%
25 - 44 $79,634 4.5%
45 - 64 $83,248 2.0%
Over 65 $56,745 -0.0%
Above poverty level
58,785
Below poverty level
5,867
Value Percent YoY
change
Above poverty level 58,785 90.9% 1.2%
Below poverty level 5,867 9.1% -4.2%

Average renter income in Janesville

To get a better sense of what renters earn on average in Janesville, their median household income was $45,531 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 27.8%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$45,531
Rent-to-income ratio
27.8%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Janesville

Workforce and job types in Janesville

The job market in Janesville is powered by 33,788 working residents, spread across a range of industries and roles. 70.5% of the working population are employed in professional or administrative positions, while 29.5% are in hands-on or service-based jobs. Also, 6.1% run their own businesses, 72.8% are employed by private companies, and 13.3% work in the public sector.

Workforce demographics

Working population
33,788
2.0% year-over-year change
White collar
23,834
Blue collar
9,954
Value Percent YoY change
White collar 23,834 70.5% 2.8%
Blue collar 9,954 29.5% -0.1%
Employer type
Self employees
6.1%
Private companies
72.8%
Governmental workers
13.3%
Not for profit companies
7.8%
Value Percent YoY change
Self employees 2,064 6.1% -3.3%
Private companies 24,598 72.8% 2.6%
Governmental workers 4,482 13.3% 4.7%
Not for profit companies 2,644 7.8% -4.1%
Unemployment rate
4.1%
-8.9% year-over-year change

Available workforce

The unemployment rate in Janesville stands at 4.1%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Janesville

How people get around in Janesville

In Janesville, the average commute time is 22 minutes. Commuting methods vary: 87.3% of residents travel by personal vehicle and 1.4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
22 min
2.3% year-over-year change
Means of transportation
Value Percent YoY change
Car 29,119 87.3% 1.4%
Taxicab 35 0.1% -2.8%
Bus or trolleybus 201 0.6% -17.3%
Motorcycle 53 0.2% -15.9%
Bicycle 67 0.2% -30.2%
Walk 456 1.4% 11.8%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Janesville by zipcode?

Zipcode Population Number of households Median income Average income
53545 24,703 10,909 $73,889 $89,824
53546 29,867 12,314 $75,825 $91,767
53548 19,916 8,562 $76,869 $87,557

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FAQs about Janesville demographics 

What is the total population of Janesville?

Janesville has a total population of 66,030 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.3% compared to a year ago.

What is the gender ratio in Janesville?

The gender ratio in Janesville is as follows:
  • 49.1% males (32,449 residents)
  • 50.9% females (33,581 residents)

What is the median age in Janesville?

The median age in Janesville is 40.7.

What is the age distribution of the population in Janesville?

The age distribution in Janesville is as follows:
  • Under 15: 17.2% (11,391 residents)
  • Ages 15-24: 12.4% (8,215 residents)
  • Ages 25-44: 26.3% (17,363 residents)
  • Ages 45-64: 25.8% (17,029 residents)
  • Over 65: 18.2% (12,032 residents)

What is the racial and ethnic makeup of Janesville?

The racial and ethnic makeup of Janesville is as follows:
  • White: 85.2% (56,276 residents)
  • Black or African American: 3.1% (2,020 residents)
  • American Indian and Alaska Native: 0.4% (239 residents)
  • Asian: 1.6% (1,038 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (9 residents)
  • Two or More Races: 7.2% (4,724 residents)
  • Other: 2.6% (1,724 residents)

What percentage of the population in Janesville are U.S.-born citizens?

U.S.-born citizens represent 95.6% of the population in Janesville.

How many housing units are there in Janesville?

There are 29,330 housing units in Janesville, reflecting a +0.6% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Janesville and what is the average household size?

Janesville has a total of 28,326 households, with an average of 2 people in each.

What is the median household income in Janesville?

Janesville has a median household income of $73,446, representing a +2.5% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Janesville?

The employment rate is 95.9% in Janesville, with a workforce of 33,788 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 70.5% (23,834 residents)
  • Blue-collar workers: 29.5% (9,954 residents)

Places of employment:
  • Self-employed: 6.1% (2,064 residents)
  • Private companies: 72.8% (24,598 residents)
  • Governmental workers: 13.3% (4,482 residents)
  • Not-for-profit companies: 7.8% (2,644 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025