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Wisconsin / Janesville
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All Janesville population data above are from the US Census Bureau.
With 3,440 people, Janesville is the 254th most populated city in the state of Wisconsin out of 1,894 cities. But watch out, Janesville, because Lac du Flambeau with 3,435 people and Sauk City with 3,427 people are right behind you.
The largest Janesville racial/ethnic groups are White (87.6%) followed by Hispanic (4.7%) and Black (3.9%).
In 2013, the median household income of Janesville residents was $81,591. Janesville households made slightly more than Knowlton households ($81,458) and Sun Prairie households ($81,442) . However, 4.2% of Janesville residents live in poverty.
The median age for Janesville residents is 42.6 years young.