Population 2,706 · Census ACS 2020–24
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Population and households in Janesville
Household size in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 2.53 | 2.44 | 2.68 |
| 2010–14 | 2.49 | 2.45 | 2.73 |
| 2015–19 | 2.43 | 2.43 | 2.71 |
| 2020–24 | 2.44 | 2.43 | 2.65 |
| Change | −0.09 | −0.01 | −0.03 |
The average household in Janesville has 2.44 people, under the U.S. average of 2.65. Iowa as a whole looks much the same.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 42.2 | 38.8 | 37.7 |
| 2010–14 | 42.6 | 39.3 | 38.6 |
| 2015–19 | 46.9 | 39.7 | 39.6 |
| 2020–24 | 45.0 | 39.8 | 40.1 |
| Change | +2.8 | +1.0 | +2.3 |
Janesville skews older: half of its residents are older than 45.0, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. The median age has climbed from 42.2 in 2006–10, but in a place this small, survey estimates can swing a lot from one release to the next.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 6.8% | 9.5% | 12.3% |
| 2010–14 | 8.6% | 9.9% | 12.3% |
| 2015–19 | 2.7% | 10.0% | 11.6% |
| 2020–24 | 8.2% | 10.0% | 11.6% |
| Change | +1.4 pts | +0.6 pts | −0.6 pts |
Single-parent households are relatively rare in Janesville: 8.2% of households, against 11.6% nationally.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Janesville
Renters in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 12.5% | 26.8% | 33.3% |
| 2010–14 | 15.5% | 28.2% | 35.6% |
| 2015–19 | 12.0% | 28.9% | 36.0% |
| 2020–24 | 11.5% | 28.3% | 34.8% |
| Change | −1.0 pts | +1.5 pts | +1.5 pts |
Only 11.5% of households in Janesville rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 34.8% have no mortgage at all, below the national share of 39.8%.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 4.6% | 8.7% | 11.4% |
| 2010–14 | 6.5% | 8.6% | 11.4% |
| 2015–19 | 4.2% | 9.4% | 11.1% |
| 2020–24 | 11.0% | 8.8% | 9.6% |
| Change | +6.4 pts | +0.1 pts | −1.8 pts |
About as many homes sit empty in Janesville as nationally: 11.0%, against 9.6%. The rate is higher than in Iowa as a whole (8.8%).
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 1972 | 1965 | 1974 |
| 2010–14 | 1969 | 1967 | 1975 |
| 2015–19 | 1970 | 1969 | 1977 |
| 2020–24 | 1975 | 1971 | 1980 |
| Change | +4 | +6 | +6 |
Housing in Janesville leans a little older: the median home dates to 1975, against 1980 nationally. That is in line with the rest of Iowa.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | $595 | $669 | $965 |
| 2010–14 | $604 | $732 | $1,040 |
| 2015–19 | $719 | $821 | $1,213 |
| 2020–24 | $830 | $1,020 | $1,571 |
| Change | +$235 | +$351 | +$606 |
The median renter in Janesville pays $830 a month for rent and utilities, well below the national median of $1,571. The typical renter here spends 36.3% of household income on rent, well over the 30% mark often used to define affordable rent, so many renters here are stretched.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Janesville
Bachelor's degrees in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 29.7% | 26.5% | 28.4% |
| 2010–14 | 26.0% | 27.9% | 29.6% |
| 2015–19 | 27.3% | 29.3% | 32.1% |
| 2020–24 | 36.3% | 32.3% | 35.6% |
| Change | +6.5 pts | +5.8 pts | +7.2 pts |
College degrees are about as common in Janesville as nationally: 36.3% of adults 25 and older have a bachelor's or higher, against 35.6%. The share is higher than in Iowa overall (32.3%).
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 93.3% | 90.4% | 84.9% |
| 2010–14 | 95.5% | 91.4% | 86.1% |
| 2015–19 | 95.6% | 92.1% | 87.7% |
| 2020–24 | 97.9% | 93.0% | 89.3% |
| Change | +4.6 pts | +2.7 pts | +4.3 pts |
Finishing high school is nearly universal in Janesville: 97.9% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Janesville
| Period | Janesville | Iowa | U.S. |
|---|---|---|---|
| 2006–10 | 4.7% | 5.2% | 8.1% |
| 2010–14 | 3.2% | 5.4% | 9.4% |
| 2015–19 | 1.8% | 3.7% | 5.6% |
| 2020–24 | 1.9% | 3.7% | 5.4% |
| Change | −2.8 pts | −1.5 pts | −2.7 pts |
The job market in Janesville has been strong: just 1.9% of the labor force was out of work and looking, well below the national rate of 5.4%. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Janesville compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Janesville | 2.44 | 45.0 | 8.2% | 11.5% | 11.0% | 1975 | $830 | 36.3% | 97.9% | 1.9% |
| Waverly | 2.46 | 35.2 | 10.2% | 28.7% | 7.5% | 1976 | $1,034 | 42.9% | 95.4% | 2.7% |
| North Cedar | 2.42 | 42.5 | 5.0% | 15.7% | 5.8% | 1979 | $930 | 47.1% | 97.9% | 3.5% |
| Denver | 2.75 | 38.3 | 6.3% | 12.9% | 7.0% | 1973 | $947 | 43.8% | 98.8% | 4.4% |
| Shell Rock | 2.57 | 42.0 | 6.0% | 14.2% | 9.6% | 1959 | $908 | 22.3% | 93.8% | 3.1% |
| New Hartford | 2.57 | 47.2 | 8.7% | 14.0% | 9.2% | 1970 | $900 | 23.9% | 98.0% | 2.3% |
| Cedar Falls | 2.41 | 34.3 | 5.2% | 35.2% | 7.4% | 1978 | $1,208 | 52.1% | 97.7% | 4.0% |
| Bremer | 2.70 | 38.0 | 4.3% | 9.6% | 18.1% | 1968 | $865 | 41.3% | 99.1% | 0.1% |
| Knittel | 2.46 | 41.1 | 7.7% | 9.7% | 2.4% | 1943 | $833 | 25.0% | 94.3% | 1.8% |
| Clarksville | 2.27 | 49.4 | 4.8% | 16.9% | 9.0% | 1938 | $734 | 18.9% | 93.9% | 2.7% |
| Horton | 2.49 | 42.2 | 4.1% | 9.6% | 15.6% | 1951 | $753 | 24.9% | 95.4% | 1.8% |
All figures 2020–24.
Cities with similar populations: Belmond, IA · Bourbon, IN · Villa Grove, IL · Dakota City, NE · New Britain, PA · McComb, OH · New Florence, PA · Northville, NY · Perrysville, OH · Pleasant Valley, MO
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Janesville. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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