About Onalaska, WIOnalaska is located in Wisconsin. Onalaska, Wisconsin has a population of 18,728. Onalaska is more family-centric than the surrounding county with 29% households with children. The county percentage for households with children is 25%. The median household income in Onalaska, Wisconsin is $48,419. The median household income for the surrounding county is $45,886 compared to the national median of $50,013. The median age of people living in Onalaska is 39.8 years. Onalaska WeatherThe average high temperature in July is 85.2 degrees, with an average low temperature in January of 6.3 degrees. The annual precipitation is 32.36. Onalaska MapOnalaska real estate officesSort by:
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