Janesville city, Iowa Demographics & Population 2026
As of 2026, Janesville city, Iowa has a total population of 1,012, the 285th largest city in Iowa, with a median household income of $84,231, which is 15% higher than the state average. The poverty rate is 5.8%.
Janesville city Quick Facts
How Janesville city Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 30 | National average: 60
Education
Educational Attainment (Adults 25+)
Janesville city Rankings in Iowa
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Cities Similar to Janesville city
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Riverside city | 1,040 | $81,094 | $191,100 | 28.8% | 3.8% |
| Calmar city | 980 | $81,583 | $194,600 | 28.3% | 10.4% |
| Preston city | 1,057 | $82,950 | $144,600 | 23.1% | 16.4% |
| Danville city | 966 | $82,917 | $148,600 | 28.4% | 11.3% |
| Underwood city | 977 | $90,556 | $227,400 | 32.6% | 2.5% |
Population Overview
Janesville city is a small community located in Iowa. The total population is 1,012. It ranks as the 285th most populous out of 1,018 cities and towns in Iowa.
Age Demographics
The median age in Janesville city is 44.7 years. This is 16% higher than the state median of 38.6 years.
Economy, Income & Housing
The median household income in Janesville city is $84,231. This is 15% higher than the state median of $73,147. Compared to the national median of $78,538, household income here is 7% higher. The poverty rate stands at 5.8%. This is 48% lower than the state poverty rate of 11.0%. The unemployment rate is 3.0%. This is 18% lower than the state rate of 3.6%. The median home value is $214,700. Housing costs are 10% higher than the state median of $195,900. With a home-value-to-income ratio of just 2.5x, Janesville city is one of the most affordable housing markets in the area. 90.5% of occupied housing units are owner-occupied. This homeownership rate is 26% higher than the state average of 71.5%.
Race & Ethnicity
Janesville city has a predominantly White (non-Hispanic) population, comprising 97.4% of all residents. Hispanic or Latino residents account for 2.2%. The Hispanic or Latino population (2.2%) is well below the state average of 7.0%.
Education
25.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 17% lower than the state rate of 30.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 98.3%.
Data Sources & Methodology
All demographic data for Janesville city, Iowa is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Iowa state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,018 Census-designated places in Iowa. For official data, visit data.census.gov.
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Frequently Asked Questions
What is the population of Janesville city, Iowa?
Janesville city, Iowa has a population of 1,012 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Janesville city, IA?
The median household income in Janesville city is $84,231, which is 7% higher the national median of $78,538.
What is the poverty rate in Janesville city, IA?
The poverty rate in Janesville city is 5.8%. This means approximately 58 residents live below the federal poverty line.
What is the racial makeup of Janesville city, Iowa?
Janesville city's population is 97.4% White, 0.0% Black, 2.2% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Janesville city, IA?
The median home value in Janesville city is $214,700. The home-value-to-income ratio is 2.5x.
How educated is Janesville city, Iowa?
25.8% of adults (25+) in Janesville city hold a bachelor's degree or higher, and 3.3% hold a graduate or professional degree.