How many people live in the Janesville, WI area?
Updated Mar. 4, 2026Refreshed annually
In 2024 there were 165,500 people in the Janesville, WI area. That makes the Janesville, WI metropolitan statistical area the 265th-most populous metro area in the US. It is home to 0.05% of the nation's population.
165K
population of Janesville, WI area (2024)
0.05%
Janesville, WI area share of US population (2024)
Between 2010 and 2024, the population of the Janesville, WI area increased from 160,300 to 165,500—a 3.2% increase. During that same period, the US population grew 9.9%.
About 165,500 people lived in the Janesville, WI area in 2024.
Population estimates of the Janesville-Beloit, WI Metro Area, 2010–2024
What are the age demographics of the Janesville, WI area?
About 18.8% of the Janesville, WI area's population in 2024 was aged 65 years or older, higher than the 18% share in the nation overall. Children (under 18) account for 21.8% of the Janesville, WI area population, above the 21.6% population share of children nationwide.
A higher share of the Janesville, WI area population is 65 and older than the US overall.
Population share by age group in Janesville-Beloit, WI Metro Area and the US overall (2024)
What is the racial and ethnic makeup of the Janesville, WI area?
Non-Hispanic white residents make up 80.2% of the Janesville, WI area population, higher than the national share of 57.5%.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
A higher share of the Janesville, WI area population is non-Hispanic white than the US overall.
Population share by race and ethnicity in Janesville-Beloit, WI Metro Area and the US overall (2024)
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
