| Population for Illinois |  |
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| Population Over Time | Number | Rank in State | Percent of State | State | | 2007 | 12,852,548 | 1 | 100.00% | 12,852,548 | | 2000 | 12,419,293 | 1 | 100.00% | 12,419,293 | | 1990 | 11,430,602 | 1 | 100.00% | 11,430,602 | | 1980 | 11,427,429 | 1 | 100.00% | 11,427,429 | | 1970 | 11,110,288 | 1 | 100.00% | 11,110,288 | | 1990 to 2000 % change | 8.6% | 1 |   | 8.6% | | 1980 to 2000 % change | 8.7% | 1 |   | 8.7% | | 1970 to 2000 % change | 11.8% | 1 |   | 11.8% | Source: US Census Bureau |
| Components of Population Change in 2007 | Number | Rank in State | Percent of State | State | | Net Domestic Migration (chg 2006/2007) | -60,265 | 1 |   | -60,265 | | Net International Migration (chg 2006/2007) | 54,402 | 1 | 100.00% | 54,402 | | Natural Increase (births minus deaths) | 81,666 | 1 | 100.00% | 81,666 | | Births | 185,590 | 1 | 100.00% | 185,590 | | Deaths | 103,924 | 1 | 100.00% | 103,924 | Source: US Census Bureau |
| Population Estimates by Age in 2006 | Number | Rank in State | Pct Dist. in State | Pct Dist. in State | | Preschool (0 to 4) | 887,605 | 1 | 6.9% | 6.9% | | School Age (5 to 17) | 2,327,639 | 1 | 18.1% | 18.1% | | College Age (18 to 24) | 1,281,767 | 1 | 10.0% | 10.0% | | Young Adult (25 to 44) | 3,659,718 | 1 | 28.5% | 28.5% | | Older Adult(45 to 64) | 3,140,765 | 1 | 24.5% | 24.5% | | Older (65 plus) | 1,534,476 | 1 | 12.0% | 12.0% | | Median Age | 35.7 | 1 |   | Median Age = 35.7 | Sources: US Census Bureau; Median age calculated by the IBRC. Note: 2007 functional age groups (and Median Age) will not be available until the Sept. 2008 due to the lag between the 5 year age group release and the single years of age estimates. |
| Population Estimates by Race and Hispanic Origin in 2007 | Number | Rank in State | Pct Dist. in State | Pct Dist. in State | | American Ind. or Alaskan Native Alone | 42,429 | 1 | 0.3% | 0.3% | | Asian Alone | 549,043 | 1 | 4.3% | 4.3% | | Black Alone | 1,926,515 | 1 | 15.0% | 15.0% | | Native Hawaiian and Other Pac. Isl. Alone | 8,855 | 1 | 0.1% | 0.1% | | White Alone | 10,177,118 | 1 | 79.3% | 79.3% | | Two or More Race Groups | 148,588 | 1 | 1.2% | 1.2% | | Hispanic or Latino (can be of any race) | | Non-Hispanic or Latino | 10,932,858 | 1 | 85.2% | 85.2% | | Hispanic or Latino | 1,919,690 | 1 | 15.0% | 15.0% | Source: US Census Bureau |
Hispanic or Latino Population in 2000 (can be of any race) | Number | Rank in State | Pct Dist. in State | Pct Dist. in State | | Hispanic | 1,530,262 | 1 | 12.3% | 12.3% | | Mexican | 1,144,390 | 1 | 9.2% | 9.2% | | Cuban | 18,438 | 1 | 0.1% | 0.1% | | Puerto Rican | 157,851 | 1 | 1.3% | 1.3% | | Other | 209,583 | 1 | 1.7% | 1.7% | | White, Not Hispanic (reporting white alone) | 8,424,140 | 1 | 67.8% | 67.8% | Source: US Census Bureau |