Counties in Illinois

  1. Knox (State: Illinois Population: 40,501)
  2. DuPage (State: Illinois Population: 738,036)
  3. Edwards (State: Illinois Population: 4,659)
  4. Mercer (State: Illinois Population: 3,613)
  5. McHenry (State: Illinois Population: 188,040)
  6. Rock Island (State: Illinois Population: 116,954)
  7. Union (State: Illinois Population: 8,105)
  8. Lake (State: Illinois Population: 545,357)
  9. Christian (State: Illinois Population: 21,946)
  10. Menard (State: Illinois Population: 1,726)
  11. Logan (State: Illinois Population: 18,719)
  12. Sangamon (State: Illinois Population: 141,291)
  13. Kane (State: Illinois Population: 386,814)
  14. Pike (State: Illinois Population: 6,837)
  15. Peoria (State: Illinois Population: 145,957)
  16. Will (State: Illinois Population: 314,012)
  17. Piatt (State: Illinois Population: 8,358)
  18. Macoupin (State: Illinois Population: 27,548)
  19. Moultrie (State: Illinois Population: 6,835)
  20. McLean (State: Illinois Population: 123,818)
  21. Macon (State: Illinois Population: 97,126)
  22. Kankakee (State: Illinois Population: 70,357)
  23. Massac (State: Illinois Population: 7,536)
  24. McDonough (State: Illinois Population: 23,272)
  25. Ogle (State: Illinois Population: 25,566)
  26. Alexander (State: Illinois Population: 3,632)
  27. Champaign (State: Illinois Population: 141,217)
  28. Coles (State: Illinois Population: 39,330)
  29. Edgar (State: Illinois Population: 10,395)
  30. Iroquois (State: Illinois Population: 12,819)
  31. De Witt (State: Illinois Population: 9,540)
  32. Bureau (State: Illinois Population: 9,842)
  33. Jo Daviess (State: Illinois Population: 8,877)
  34. Whiteside (State: Illinois Population: 36,971)
  35. Effingham (State: Illinois Population: 13,943)
  36. Woodford (State: Illinois Population: 17,686)
  37. Stephenson (State: Illinois Population: 29,330)
  38. Bond (State: Illinois Population: 6,955)
  39. Mason (State: Illinois Population: 7,868)
  40. Jersey (State: Illinois Population: 7,984)
  41. Wabash (State: Illinois Population: 7,982)