Counties in Illinois by gini index

Gallatin County had the highest gini index of 102 counties in 2023, at 55 index. Kendall County had the lowest, at 35.6 index. The median was 43.5 index and the figure for Illinois was 48 index. Source: the U.S. Census Bureau.

Lowest35.6Kendall County
Median43.5102 counties
Illinois48History

Top 40 counties, 2023

CSVChart (SVG)

Gallatin CountyGallatin County: 55 index55Jackson CountyJackson County: 51.1 index51.1Saline CountySaline County: 50.4 index50.4Champaign CountyChampaign County: 50.3 index50.3Cook CountyCook County: 50.3 index50.3Wabash CountyWabash County: 49.2 index49.2Peoria CountyPeoria County: 48.9 index48.9McDonough CountyMcDonough County: 48.2 index48.2Lake CountyLake County: 47.8 index47.8McLean CountyMcLean County: 47.7 index47.7Alexander CountyAlexander County: 47.7 index47.7Coles CountyColes County: 47 index47Clay CountyClay County: 46.5 index46.5Macon CountyMacon County: 46.5 index46.5Fayette CountyFayette County: 46.4 index46.4Hamilton CountyHamilton County: 45.7 index45.7DuPage CountyDuPage County: 45.7 index45.7Sangamon CountySangamon County: 45.7 index45.7St. Clair CountySt. Clair County: 45.6 index45.6Montgomery CountyMontgomery County: 45.6 index45.6Wayne CountyWayne County: 45.5 index45.5Hancock CountyHancock County: 45.5 index45.5Crawford CountyCrawford County: 45.3 index45.3White CountyWhite County: 45.2 index45.2Union CountyUnion County: 45.2 index45.2Knox CountyKnox County: 45.2 index45.2Franklin CountyFranklin County: 45.2 index45.2Winnebago CountyWinnebago County: 45.1 index45.1Whiteside CountyWhiteside County: 44.8 index44.8Fulton CountyFulton County: 44.6 index44.6Williamson CountyWilliamson County: 44.5 index44.5Christian CountyChristian County: 44.5 index44.5Madison CountyMadison County: 44.5 index44.5Iroquois CountyIroquois County: 44.4 index44.4DeKalb CountyDeKalb County: 44.4 index44.4Vermilion CountyVermilion County: 44.3 index44.3Adams CountyAdams County: 44.2 index44.2Pulaski CountyPulaski County: 44.1 index44.1Morgan CountyMorgan County: 44 index44Kankakee CountyKankakee County: 44 index44
index. Source: U.S. Census Bureau. Retrieved 2026-10-10.

Full ranking

RankCounties2023
index
Change on 2022
1Gallatin County55-1.2
2Jackson County51.1-0.3
3Saline County50.4-0.6
4Champaign County50.3+0.5
5Cook County50.3-0.2
6Wabash County49.2+3.6
7Peoria County48.9-0.3
8McDonough County48.2-0.6
9Lake County47.8-0.2
10McLean County47.7-0.3
11Alexander County47.7+2.6
12Coles County47-0.5
13Clay County46.5+1.4
13Macon County46.5-0.1
15Fayette County46.4+0.9
16Hamilton County45.7+5.6
17DuPage County45.7-0.1
18Sangamon County45.7-0.3
19St. Clair County45.6+0.6
20Montgomery County45.6+0.9
21Wayne County45.5+3.4
22Hancock County45.5+0.4
23Crawford County45.3+1.3
24White County45.2+0.9
25Union County45.2-0
26Knox County45.2-1
27Franklin County45.2+0.3
28Winnebago County45.1-0.1
29Whiteside County44.8+0.4
30Fulton County44.6+0.2
31Williamson County44.5-0.7
32Christian County44.5+1.2
33Madison County44.50
34Iroquois County44.4+1.3
35DeKalb County44.4+0.2
36Vermilion County44.3+0.8
37Adams County44.2+0.5
38Pulaski County44.1-1.6
39Morgan County44-0.5
40Kankakee County44+0.3
41Marion County43.9+0.8
42Logan County43.9-0.2
43Greene County43.9-0.5
44Rock Island County43.8+0.6
45Bureau County43.8+0.9
46Lawrence County43.7-2.3
47Pope County43.7-0.5
48Ford County43.6+0.2
49Lee County43.5-0.3
50Clinton County43.5+0.6
51Jersey County43.5-0.3
52Stark County43.5-1.4
53LaSalle County43.3-0.2
54Kane County43.2-0.7
55Jefferson County43.2-0.3
56Bond County43.1+0.1
57Stephenson County43.1-0.6
58Effingham County42.9-0.7
59Macoupin County42.80
60Pike County42.80
61Henry County42.6-1
62Carroll County42.5+1
63Edgar County42.4+1.1
64Cumberland County42.4+2.5
65Boone County42.3-0.1
66Edwards County42.1+1.1
67De Witt County42.1-0.3
67Marshall County42.1-0.2
69Tazewell County42.1+0.4
70Hardin County42.1-4.6
71Woodford County42.1-0.6
72Johnson County42-0.6
73Mason County42-1.8
74Schuyler County42+0.5
75Jo Daviess County41.8+0.1
76Scott County41.7+1.8
77Menard County41.6+1.7
78Livingston County41.5-0.1
79Piatt County41.4-0.3
80Richland County41.4+1.1
81McHenry County41.3+0.3
82Perry County41.3-0.1
83Moultrie County41.3-0.8
84Cass County41.3+0.9
85Will County41.1+0.1
86Grundy County41+1.4
87Brown County41+0.3
88Warren County40.7-1.2
89Douglas County40.6-0.4
89Jasper County40.6+0.9
91Ogle County40.40
92Monroe County40.1+0.2
93Randolph County40.1-0.2
94Mercer County40.1-1
95Massac County40-0.5
96Clark County39.6+0.1
97Washington County39.2-1.3
98Putnam County39.1+1.1
99Shelby County38.2-0.5
100Calhoun County37.4-3.6
101Henderson County36.8-2.6
102Kendall County35.6+0.9

Other periods

About this ranking

Income inequality on a 0 to 100 scale, where 0 is perfect equality.

Eurostat, equivalised disposable income after social transfers (EU-SILC), for the EU and its countries. For other countries use gini_index_world_bank, which is measured on a different basis. For the United States, ACS five-year estimate B19083 measures inequality in household money income before taxes. Census publishes a coefficient from 0 to 1; Invokely multiplies it by 100. The displayed year is the final year of the five-year period. Negative household incomes are treated as zero. This differs from the EU-SILC measure based on equivalised disposable income and should not be treated as directly comparable.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B19083: Gini index of household income inequality (coefficient multiplied by 100). https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b19083.dat. Retrieved 2026-10-10.

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Questions

Which county has the highest gini index?

Gallatin County, with 55 index in 2023, according to the U.S. Census Bureau.

Which county has the lowest gini index?

Kendall County, with 35.6 index in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B19083: Gini index of household income inequality (coefficient multiplied by 100). Retrieved 2026-10-10.

Gini index: other rankings

Counties in Illinois: more rankings