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State Facts for Students

Illinois FlagIllinois

Population
  2010 2018
Population 12,830,632 12,741,080
Rank 5 6
Median Age 36.6 38.3
   
Total 8 year-olds 171,594 157,443
Boys 87,660 80,704
Girls 83,934 76,739
Total 9 year-olds 174,883 156,936
Boys 88,889 79,914
Girls 85,994 77,022
Total 10 year-olds 175,927 161,916
Boys 89,700 82,312
Girls 86,227 79,604
Total 11 year-olds 174,022 163,391
Boys 88,850 82,976
Girls 85,172 80,415
Total 12 year-olds 174,671 163,371
Boys 89,449 83,199
Girls 85,222 80,172
Total 13 year-olds 175,618 164,091
Boys 89,445 84,109
Girls 86,173 79,982
Total 14 year-olds 179,210 166,379
Boys 91,716 85,042
Girls 87,494 81,337
 
How People Get to Work: 2010 2018
Drive Alone 73.8% 72.7%
Car Pool 8.7% 8.3%
Public Transportation 8.5% 9.4%
Work at Home 4.3% 5.1%
 
Computer and Internet Use: 2018
Homes with a Computer 91.5%

Geography
  2010
Capital Springfield
Largest City Chicago
Second Largest City Aurora
Persons Per Square Mile 231.1

Business
  2010 2017
Dentist Offices 5,909 6,028
Amusement Parks 18 14
Fast-Food Restaurants 9,069 10,440
Toy Stores 362 344
Video/Disc Rental Stores 471 159
Zoos & Botanical Gardens 14 24
Candy & Nut Stores 236 222
Pet & Pet Supply Stores 353 371
Ice Cream & Frozen Dessert Makers 17 22

Note: As is the case with all surveys, statistics from sample surveys are subject to sampling and nonsampling error.

A value of NA indicates that data are not available for the indicated time period. A value of X indicates that data are not applicable for the current region.

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History

  • Date of Statehood: December 3, 1818
  • Population 1820: 55,211
  • Population 1850: 851,470
  • Population 1900: 4,821,550
  • Population 1950: 8,712,176
  • Population 2000: 12,419,293
  • Population 2010: 12,830,632

I never knew that! *

  • Nickname: Prairie State
  • Slogan: Land of Lincoln
  • Flower: Purple Violet
  • Tree: White Oak
  • Bird: Cardinal
  • Mammal: White-tailed deer
  • Snack: Popcorn
  • Fossil: Tully-Monster

Who told you this stuff?

The U.S. Census Bureau takes a census of the population every 10 years, and censuses of economic activity and governments every five years. And every year, the Census Bureau conducts more than 100 other surveys. Data on this page come from the 2010 Census, the American Community Survey, Population Estimates, County Business Patterns, and Puerto Rico Community Survey.

How are these data collected?

The U.S. Census Bureau sends questionnaires in the mail or contacts businesses and households to participate in its surveys.

* State and Island Area symbol information was obtained from various non-Census Bureau resources including state web sites, educational web sites, and commercial entities.

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