countyscore

Best Soil Quality Counties in Illinois

Soil composition, pH, drainage, and organic matter content Compare rankings across all 102 counties.

Average Soil Quality Score
74/100
Top County
Lake County
Counties Ranked
102

Top 10

#1
Lake County
IL
87/100
#2
Kendall County
IL
86/100
#3
DeKalb County
IL
86/100
#4
DuPage County
IL
86/100
#5
Tazewell County
IL
86/100
#6
Kane County
IL
86/100
#7
McHenry County
IL
86/100
#8
Whiteside County
IL
85/100
#9
Boone County
IL
85/100
#10
Winnebago County
IL
84/100

All Illinois Counties Ranked

#CountySoil Quality ScoreOverall Score
1Lake County, IL
87.2
47.2
2Kendall County, IL
86.2
38.6
3DeKalb County, IL
85.8
37
4DuPage County, IL
85.7
54
5Tazewell County, IL
85.7
42.5
6Kane County, IL
85.6
47.1
7McHenry County, IL
85.6
52.3
8Whiteside County, IL
85
46.3
9Boone County, IL
84.8
43.7
10Winnebago County, IL
83.9
42.4
11Mason County, IL
83.8
52.8
12Stark County, IL
83.8
61.1
13Stephenson County, IL
83.1
45.6
14LaSalle County, IL
82.8
40.6
15Bureau County, IL
82.2
45.7
16Christian County, IL
81.2
55.3
17Henry County, IL
80.5
50.3
18Woodford County, IL
80.4
58.8
19Ogle County, IL
80.1
38.7
20Hancock County, IL
80
58.6
21Cook County, IL
79.6
30.3
22Sangamon County, IL
79.6
33.4
23Will County, IL
79.6
50.3
24Lee County, IL
79.2
51.7
25Logan County, IL
78.6
51.6
26Peoria County, IL
78.1
31
27Douglas County, IL
77.8
55.6
28Carroll County, IL
77.6
60.6
29Warren County, IL
77.5
52.4
30Fayette County, IL
77.3
53.8
31Henderson County, IL
77.3
61.7
32Livingston County, IL
77.2
51.6
33Marshall County, IL
77.1
54.9
34Shelby County, IL
77.1
60.9
35Kankakee County, IL
76.9
48
36Knox County, IL
76.2
56.1
37De Witt County, IL
76
47.8
38McDonough County, IL
76
56.3
39St. Clair County, IL
75.9
41.3
40Macon County, IL
75.8
34.6
41Montgomery County, IL
75.7
45.9
42Greene County, IL
75.6
60.3
43Jersey County, IL
75.6
53.4
44Edgar County, IL
75.5
59.8
45Jo Daviess County, IL
75.4
60.8
46McLean County, IL
75.4
48.1
47Fulton County, IL
75.3
53.9
48Schuyler County, IL
75
58.3
49Ford County, IL
74.8
53.8
50Bond County, IL
74.7
55.2
51Monroe County, IL
74.6
58.5
52Madison County, IL
74.5
38.1
53Vermilion County, IL
74.2
35.5
54Rock Island County, IL
74.1
36.7
55Clinton County, IL
73.9
52
56Menard County, IL
73.9
59.2
57Piatt County, IL
73.9
54.9
58Mercer County, IL
73.8
63.1
59Coles County, IL
73.7
57.4
60Macoupin County, IL
73.2
52.5
61Adams County, IL
72.9
54.7
62Champaign County, IL
72.9
34.4
63Iroquois County, IL
72.8
50.3
64Cumberland County, IL
72.4
62
65Moultrie County, IL
72.4
58.4
66Pike County, IL
72.3
55.6
67Calhoun County, IL
71.7
63
68Grundy County, IL
71.7
44.8
69Washington County, IL
71.4
63.7
70Brown County, IL
71.1
69.5
71Randolph County, IL
70.8
58.7
72Effingham County, IL
70.7
49.7
73White County, IL
70.5
62.5
74Putnam County, IL
70.2
59.3
75Cass County, IL
70
57.4
76Clay County, IL
69.3
55.8
77Morgan County, IL
69.1
43.1
78Marion County, IL
69
46.7
79Perry County, IL
67.5
59.8
80Scott County, IL
67.4
68.1
81Clark County, IL
67
55.5
82Wayne County, IL
66.5
52.5
83Richland County, IL
66.2
51.4
84Jackson County, IL
65.8
36
85Edwards County, IL
65.6
66.7
86Union County, IL
65.6
57.4
87Crawford County, IL
65.5
52.5
88Wabash County, IL
65.5
55.3
89Jefferson County, IL
65.1
51.7
90Jasper County, IL
64.3
59.7
91Gallatin County, IL
64.2
67.6
92Pulaski County, IL
63.9
62.9
93Alexander County, IL
63.4
62.2
94Hamilton County, IL
63.3
68.6
95Franklin County, IL
61.8
55.9
96Saline County, IL
60.5
56.8
97Lawrence County, IL
60.2
55.7
98Johnson County, IL
57.8
67.7
99Williamson County, IL
57.5
49.9
100Massac County, IL
56.1
43.2
101Hardin County, IL
55.5
70.7
102Pope County, IL
55.2
67.4

Data Source

Soil Quality data from SoilByCounty. See full details at SoilByCounty. Data updated February 2026.