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Illinois change

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Voices for Illinois Children, Powered by YWCA Metropolitan Chicago

Population by age by county in Illinois

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Data Source:

U.S. Census Bureau's 2000 Decennial Census, Sex by Age [49] (Universe: Total Population), Census 2000 Summary File 1 (SF 1), Table P012; U.S. Census Bureau's 2010 Decennial Census, Sex by Age (Universe: Total Population), 2010 Census Summary File 1, Table P12; U.S. Census Bureau's American Community Survey, Age and Sex, 2011-2015 to 2015-2019 5-Year Estimates, Table S0101

Footnotes: Data from 2000 and 2010 are full counts of the population.  Data from 2011-2015 to 2015-2019 are 5-year estimates of the population, which means caution should be used when comparing them to 2000 and 2010 data.