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Waukesha County Population

All Waukesha County population data above are from the US Census Bureau.

Waukesha County Demographics Summary

Population

With 398,424 people, Waukesha County is the 3rd most populated county in the state of Wisconsin out of 72 counties. But watch out, Waukesha County, because Brown County with 260,401 people and Racine County with 195,140 people are right behind you.

Race & Ethnicity

The largest Waukesha County racial/ethnic groups are White (89.6%) followed by Hispanic (4.5%) and Asian (2.9%).

Median Income

In 2015, the median household income of Waukesha County residents was $76,545. Waukesha County households made slightly more than Ozaukee County households ($76,433) and St. Croix County households ($70,886) . However, 5.3% of Waukesha County residents live in poverty.

Median Age

The median age for Waukesha County residents is 42.8 years young.

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The population data for Waukesha County are from the Census 2000, Census 2010, the Census' American Community Survey 2015 5-year estimates and the Census' 2016 Population Estimates. The demographic data for Brown County, Ozaukee County, Racine County, and St. Croix County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2015 5-year estimates, and were downloaded on December 2016. Check out our FAQ section for more details.