List of Illinois counties

List of 102 counties in the U.S. state of Illinois:

1. Adams County
2. Alexander County
3. Bond County
4. Boone County
5. Brown County
6. Bureau County
7. Calhoun County
8. Carroll County
9. Cass County
10. Champaign County
11. Christian County
12. Clark County
13. Clay County
14. Clinton County
15. Coles County
16. Cook County
17. Crawford County
18. Cumberland County
19. DeKalb County
20. De Witt County
21. Douglas County
22. DuPage County
23. Edgar County
24. Edwards County
25. Effingham County
26. Fayette County
27. Ford County
28. Franklin County
29. Fulton County
30. Gallatin County
31. Greene County
32. Grundy County
33. Hamilton County
34. Hancock County
35. Hardin County
36. Henderson County
37. Henry County
38. Iroquois County
39. Jackson County
40. Jasper County
41. Jefferson County
42. Jersey County
43. Jo Daviess County
44. Johnson County
45. Kane County
46. Kankakee County
47. Kendall County
48. Knox County
49. La Salle County
50. Lake County
51. Lawrence County
52. Lee County
53. Livingston County
54. Logan County
55. Macon County
56. Macoupin County
57. Madison County
58. Marion County
59. Marshall County
60. Mason County
61. Massac County
62. McDonough County
63. McHenry County
64. McLean County
65. Menard County
66. Mercer County
67. Monroe County
68. Montgomery County
69. Morgan County
70. Moultrie County
71. Ogle County
72. Peoria County
73. Perry County
74. Piatt County
75. Pike County
76. Pope County
77. Pulaski County
78. Putnam County
79. Randolph County
80. Richland County
81. Rock Island County
82. Saline County
83. Sangamon County
84. Schuyler County
85. Scott County
86. Shelby County
87. St. Clair County
88. Stark County
89. Stephenson County
90. Tazewell County
91. Union County
92. Vermilion County
93. Wabash County
94. Warren County
95. Washington County
96. Wayne County
97. White County
98. Whiteside County
99. Will County
100. Williamson County
101. Winnebago County
102. Woodford County

• map
• Table with areas, populations, densities and more (uses miles).