Illinois Counties, Ranked by Slope

Rank, county, average percent slope

1. Jo Daviess, 4.25
2. Pope, 3.76
3. Hardin, 3.61
4. Calhoun, 3.55
5. Union, 3.15
6. Johnson, 3.01
7. Carroll, 2.54
8. Stephenson, 2.29
9. Jackson, 2.25
10. Jersey, 2.17
11. Brown, 2.13
12. Schuyler, 2.00
13. Alexander, 1.97
14. Fulton, 1.91
15. Pike, 1.90
16. Peoria, 1.82
17. Putnam, 1.77
18. Monroe, 1.74
19. Winnebago, 1.73
20. Ogle, 1.71
21. Randolph, 1.67
22. Saline, 1.51
23. Rock Island, 1.50
24. Marshall, 1.47
25. Adams, 1.41
26. Gallatin, 1.36
27. Greene, 1.36
28. Mercer, 1.35
29. Knox, 1.33
30. Scott, 1.32
31. Massac, 1.26
32. McHenry, 1.24
33. Bureau, 1.23
34. Tazewell, 1.22
35. Edwards, 1.21
36. Woodford, 1.19
37. Williams, 1.19
38. Hancock, 1.17
39. Clark, 1.14
40. McDonough, 1.13
41. Henry, 1.11
42. Boone, 1.07
43. Hamilton, 1.07
44. Kane, 1.06
45. Henderson, 1.04
46. La Salle, 1.03
47. Lake, 1.03
48. St. Clair, 0.99
49. Menard, 0.98
50. Cass, 0.96
51. Warren, 0.96
52. Wabash, 0.96
53. Pulaski, 0.96
54. Lee, 0.95
55. Stark, 0.95
56. Jefferson, 0.95
57. Bond, 0.93
58. Madison, 0.93
59. Morgan, 0.92
60. White, 0.91
61. Crawford, 0.91
62. Vermilion, 0.89
63. Kendall, 0.89
64. Shelby, 0.88
65. Du Page, 0.88
66. Fayette, 0.87
67. Macoupin, 0.86
68. Franklin, 0.85
69. Will, 0.84
70. Montgomery, 0.84
71. Lawrence, 0.84
72. Marion, 0.84
73. Coles, 0.84
74. Whiteside, 0.82
75. Edgar, 0.79
76. Wayne, 0.79
77. Richland, 0.77
78. McLean, 0.75
79. Effingham, 0.75
80. De Kalb, 0.74
81. Perry, 0.73
82. Cumberland, 0.73
83. Clinton, 0.72
84. Washington, 0.71
85. Clay, 0.68
86. Logan, 0.67
87. Jasper, 0.65
88. Cook, 0.64
89. De Witt, 0.63
90. Macon, 0.63
91. Sangamon, 0.62
92. Kankakee, 0.55
93. Moultrie, 0.55
94. Mason, 0.54
95. Ford, 0.54
96. Grundy, 0.54
97. Livingston, 0.52
98. Christian, 0.50
99. Champaign, 0.50
100. Piatt, 0.46
101. Iroquois, 0.44
102. Douglas, 0.40

Updated 10/1/2009 JKH