About Illinois

 State Facts

  • Statehood: December 3,1818 (the 21st state)
  • Capitol: Springfield
  • Total Land Area: 55,499 square miles
  • Total Population: 12,812,508 (2024 estimate)
  • Largest Cities: Chicago (2,638,159), Aurora (176,679), Joliet (150,568), Naperville (150,520), Rockford (145,270), Elgin (112,874), Springfield (111,959), Peoria (109,665), Champaign (89,462), Waukegan (87,149) (2024 estimates)

Elected Officials

U.S. Senators

  1. Richard J. Durbin
    DC Office
    711 Hart Senate Office Building
    Washington,  D.C. 20510
  2. Tammy Duckworth
    DC Office
    524 Hart Senate Office Building
    Washington,  D.C. 20510

U.S. House of Representatives

  1. Jonathan Jackson
    District 1
    1641 Longworth HOB
    Washington,  D.C. 20515
  2. Robin Kelly
    District 2
    2329 Rayburn HOB
    Washington,  D.C. 20515
  3. Delia Ramirez
    District 3
    1523 Longworth HOB
    Washington,  D.C. 20515
  4. Jesús "Chuy" García
    District 4
    1519 Longworth HOB
    Washington,  D.C. 20515
  5. Mike Quigley
    District 5
    2083 Rayburn HOB
    Washington,  D.C. 20515
  6. Sean Casten
    District 6
    2440 Rayburn HOB
    Washington,  D.C. 20515
  7. Danny K. Davis
    District 7
    2159 Rayburn HOB
    Washington,  D.C. 20515
  8. Raja Krishnamoorthi
    District 8
    2367 Rayburn HOB
    Washington,  D.C. 20515
  9. Jan Schakowsky
    District 9
    2408 Rayburn HOB
    Washington,  D.C. 20515
  10. Brad Schneider
    District 10
    300 Cannon HOB
    Washington,  D.C. 20515
  11. Bill Foster
    District 11
    2366 Rayburn HOB
    Washington,  D.C. 20515
  12. Mike Bost
    District 12
    352 Cannon HOB
    Washington,  D.C. 20515
  13. Nikki Budzinski
    District 13
    1009 Longworth HOB
    Washington,  D.C. 20515
  14. Lauren Underwood
    District 14
    1410 Longworth HOB
    Washington,  D.C. 20515
  15. Mary Miller
    District 15
    1740 Longworth HOB
    Washington,  D.C. 20515
  16. Darin LaHood
    District 16
    1424 Longworth HOB
    Washington,  D.C. 20515
  17. Eric Sorensen
    District 17
    1205 Longworth HOB
    Washington,  D.C. 20515