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Illinois / Winnebago County

Get Winnebago County, IL Demographics

Who knew Winnebago County demographics could be so sexy? Check out Census 2010 data and current American Community Survey data for Winnebago County, IL. Feast your eyes on statuesque tables, curvacous pie charts and titillating trend lines. We dare you to call Winnebago County demographic data boring!

Quick Facts

Population 2010 Census 295,266 #7 in the state
Median Income 2010 for Households $47,198
Poverty Rate 15.9%
Median Age 38.3 years
Largest Racial or Ethnic Group White
Sources: Census 2010 SF1 & 2006-2010 American Community Survey 5 year estimates

Winnebago County Demographics Summary

population icon With 295,266 people, Winnebago County is the 7th most populated county in the state of Illinois out of 102 counties. But watch out, Winnebago County, because St. Clair County with 270,056 people and Madison County with 269,282 people are right behind you.

income icon In 2010, the median household income of Winnebago County residents was $47,198. Winnebago County households made slightly more than Macoupin County households ($47,178) and Douglas County households ($46,941) However, 15.9% of Winnebago County residents live in poverty.

age icon The median age for Winnebago County residents is 38.3 years young.

race icon The largest Winnebago County racial/ethinic groups are White (72.5%) followed by Black (12.0%) and Hispanic (10.9%).

Winnebago County Race / Ethnic Groups

Non-Hispanic Population
White 214,196
Black 35,358
American Indian 563
Asian 6,722
Pacific Islander 61
Some Other Race 319
Two or More Races 5,870
Hispanic 32,177
Source: Census 2010 SF1 Table P9 Hispanic or Latino or Not Hispanic or Latino by Race
  • White
  • Black
  • Indian
  • Asian
  • Pacific Islander
  • Some Other Race
  • Two or More Races
  • Hispanic

3 Largest Winnebago County Race / Ethnic Groups

  • The Winnebago County White population is 214,196 persons or 72.5%.
  • The Winnebago County Black population is 35,358 persons or 12.0%.
  • The Winnebago County Hispanic population is 32,177 persons or 10.9%.

Note: the US Census Bureau defines race and ethnicity differently from the way most people think about race and ethnicity. In a nutshell, a person's origin (or what used to be called ethnicity) is either Hispanic or Non-Hispanic. And a person's race can be white, black or African American, American Indian or Alaska Native, Asian, Native Hawaiian or Other Pacific Islander, Some Other Race or Two or More Races. For more details about race and origin data, google "US Census Bureau race and origin Census 2010."


Winnebago County Median Age

Fellas, you need to start eating your Wheaties™. Winnebago County ladies have a higher median age.

Median Age 38.3 years
Median Age - Females 39.3 years
Median Age - Males 37.2 years
Source: Census 2010 SF1 Table P13 Median Age by Male/Female

Under 18 and Over 65 Age Breakdown

With 24.9% of the Winnebago County population under 18, Winnebago County has more spring chickens than a KFC ® at dinner time.

Persons Under 18 24.9%
Persons Over 65 13.8%
Everyone else 61.3
Source: Census 2010 SF1 Table P12 Male/Female by Age
  • Under 18
  • Over 65
  • Everyone else

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