This chart was created using the multiyear search tool now available on IECAM. IECAM demographers prepared estimates of population based on Census Bureau estimates for the following programs or surveys:

  • Population Estimates Program
  • American Community Survey, 5-year estimates


Population data is available on IECAM for the following geographic areas: state, county, township, municipality, IL state senate district, IL state house district, US Congressional district, Elementary School District, Unit School District, Zip Code Tabulation Area (ZCTA), Chicago Community area, and by ISBE region and IDHS region, which are sums of counties.