Janesville, Wisconsin Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Janesville, WI Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around average
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C
Income Below average
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D
Education Well below average
Source: Map AI Methodology
Population
| Metric | Janesville | Wisconsin Avg | U.S. Average |
|---|---|---|---|
| Population | 50,369 | 5,910,864 | 337,468,954 |
| Population density (per sq mi) | 1429.2 | 90.2 | 86.4 |
| Population growth (%/yr) | 0.42% | 0.34% | 0.59% |
| Median age | 40.1 | 40.4 | 37.3 |
| Households | 21,863 | 2,477,189 | 130,235,071 |
Population in Janesville grew by 17.0% from 2009 to 2024, reaching 50,369 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Janesville is Millennials, aged 29–44, at 21.7% of residents. That is 0.9 points above Wisconsin as a whole.
- Gen Z 13–28 10,174 20.2% -1.2 pts
- Millennials 29–44 10,912 21.7% +0.9 pts
- Gen X 45–60 10,100 20.1% -0.7 pts
- Boomers 61–79 8,390 16.7% -1.2 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Wisconsin, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.7% of the people living in Janesville and men 49.3%.
- Women 50.7% Wisconsin 50.0%
- Men 49.3% Wisconsin 50.0%
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Economy
Janesville has a the economy index of C, which means it is somewhat prosperous.
| Metric | Janesville | Wisconsin Avg | U.S. Average |
|---|---|---|---|
| Median household income | $69,343 | $77,698 | $80,455 |
| Income growth (%/yr) | 5.43% | 4.41% | 4.80% |
| Unemployment rate | 3.9% | 3.2% | 5.2% |
The median household income in Janesville is about 11% lower than in Wisconsin.
Housing
| Metric | Janesville | Wisconsin Avg | U.S. Average |
|---|---|---|---|
| Median home price | $187,162 | $170,479 | $248,835 |
| Median rent | $1,050 | $1,087 | $1,407 |
| Homeownership rate | 64.6% | 67.8% | 65.2% |
The median home price in Janesville is about 14.8 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,050 per month for that long.
Commute Time & Mobility
Commuters in Janesville spend about 34 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 140 hours, about 5.9 full days, spent commuting.
| Metric | Janesville | Wisconsin Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 16.9 | 18.8 | 22.4 |
| Round-trip commute (min) | 33.7 | 37.5 | 44.8 |
| Yearly time spent (hours) | 140 | 156 | 187 |
| Estimated yearly cost | $4,353 | $4,846 | $5,790 |
| Work from home | 8.9% | 13.1% | 15.0% |
| Highway traffic (vehicles/day) | 8,448 | 6,703 | 8,813 |
| Local road traffic (vehicles/day) | 1,584 | 811 | 1,355 |
The average commute time in Janesville is 17 minutes, shorter than the 19 minutes in Wisconsin.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Janesville has a education index of D, which means it is barely educated.
| Metric | Janesville | Wisconsin Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 23.0% | 29.7% | 31.6% |
| Average household size | 2.28 | 2.33 | 2.53 |
Health
Janesville has a health index of B, which means it is quite healthy.
| Metric | Janesville | Wisconsin Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 77.5 | 79.6 | 78.3 |
| Self-rated poor health | 13.3% | 13.2% | 16.3% |
| Smokers | 19.7% | 18.5% | 19.0% |
Janesville, WI Compared With Nearby Cities
How Janesville, WI compares with the 1 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Janesville, WI | 50,369 | $69,343 #1/2 | $187,162 #1/2 | 16.9 min #1/2 |
| Beloit, WI | 31,426 | $61,429 | $141,460 | 17.7 min |
Frequently Asked Questions
Common questions about Janesville, Wisconsin.
How many people live in Janesville, Wisconsin?
About 50,369 people live in Janesville, Wisconsin, in 21,863 households of 2.3 people on average. The median age is 40.1, so residents are older than the U.S. median of 37.3 by about 3 years.
How densely populated is Janesville, Wisconsin?
Averaged over its land area, Janesville, Wisconsin has 1,429 people per square mile, a density typical of urban and suburban areas. That is about 17 times the U.S. average of 86.
How affordable is housing in Janesville, Wisconsin?
The median home costs 2.7 times the median household income ($187,162 against $69,343), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,050 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in Janesville, Wisconsin?
Unemployment in Janesville, Wisconsin is only 3.9%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How common is a college degree in Janesville, Wisconsin?
23.0% of adults in Janesville, Wisconsin hold a bachelor's degree or higher (about 1 in 4), well below the U.S. share of 31.6%.
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