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All Winnebago County population data above are from the US Census Bureau.
The population data for Winnebago County are from the Census 2000, Census 2010, the Census' American Community Survey 2016 5-year estimates and the Census' 2016 Population Estimates. The demographic data for Ford County, Madison County, St. Clair County, and Whiteside County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2016 5-year estimates, and were downloaded on December 2017. Check out our FAQ section for more details.
With 285,873 people, Winnebago County is the 7th most populated county in the state of Illinois out of 102 counties. But watch out, Winnebago County, because Madison County with 265,759 people and St. Clair County with 262,759 people are right behind you.
The largest Winnebago County racial/ethnic groups are White (70.7%) followed by Black (12.3%) and Hispanic (11.9%).
In 2016, the median household income of Winnebago County residents was $49,468. Winnebago County households made slightly more than Ford County households ($49,257) and Whiteside County households ($49,151) . However, 15.5% of Winnebago County residents live in poverty.
The median age for Winnebago County residents is 39.3 years young.
86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group
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