Counties in Iowa by gini index

Jefferson County had the highest gini index of 99 counties in 2022, at 52.6 index. Madison County had the lowest, at 37 index. The median was 42.8 index and the figure for Iowa was 44.3 index. Source: the U.S. Census Bureau.

Highest52.6Jefferson County
Median42.899 counties
Iowa44.3History

Top 40 counties, 2022

CSVChart (SVG)

Jefferson CountyJefferson County: 52.6 index52.6Adams CountyAdams County: 49.5 index49.5Johnson CountyJohnson County: 49.5 index49.5Poweshiek CountyPoweshiek County: 48 index48Story CountyStory County: 47.8 index47.8Des Moines CountyDes Moines County: 47.5 index47.5Montgomery CountyMontgomery County: 47.4 index47.4Cass CountyCass County: 46.9 index46.9Black Hawk CountyBlack Hawk County: 46.4 index46.4Van Buren CountyVan Buren County: 46.4 index46.4Scott CountyScott County: 46.1 index46.1Wayne CountyWayne County: 46 index46Page CountyPage County: 45.6 index45.6Cerro Gordo CountyCerro Gordo County: 45.2 index45.2Iowa CountyIowa County: 45 index45Shelby CountyShelby County: 45 index45Clarke CountyClarke County: 45 index45Calhoun CountyCalhoun County: 45 index45Fayette CountyFayette County: 44.8 index44.8Lee CountyLee County: 44.8 index44.8Linn CountyLinn County: 44.6 index44.6Keokuk CountyKeokuk County: 44.4 index44.4Dubuque CountyDubuque County: 44.3 index44.3Appanoose CountyAppanoose County: 44.3 index44.3Floyd CountyFloyd County: 44.2 index44.2Dickinson CountyDickinson County: 44.1 index44.1Winneshiek CountyWinneshiek County: 44 index44Sac CountySac County: 44 index44Winnebago CountyWinnebago County: 43.9 index43.9Crawford CountyCrawford County: 43.9 index43.9Lucas CountyLucas County: 43.9 index43.9Webster CountyWebster County: 43.8 index43.8Delaware CountyDelaware County: 43.7 index43.7Dallas CountyDallas County: 43.5 index43.5Humboldt CountyHumboldt County: 43.5 index43.5Mills CountyMills County: 43.5 index43.5Adair CountyAdair County: 43.4 index43.4Polk CountyPolk County: 43.3 index43.3Ida CountyIda County: 43.3 index43.3Wright CountyWright County: 43.2 index43.2
index. Source: U.S. Census Bureau. Retrieved 2026-10-10.

Full ranking

RankCounties2022
index
Change on 2021
1Jefferson County52.6+1.9
2Adams County49.5-1.2
3Johnson County49.5+0.6
4Poweshiek County48-0.4
5Story County47.8+0.3
6Des Moines County47.5+0.7
7Montgomery County47.4-0.3
8Cass County46.9-0.6
9Black Hawk County46.4+0.4
10Van Buren County46.4-1.7
11Scott County46.1-0.1
12Wayne County46+1.3
13Page County45.6+4.6
14Cerro Gordo County45.2+1
15Iowa County45+3.2
15Shelby County45-0.9
17Clarke County45-1.1
18Calhoun County45+1.7
19Fayette County44.8+0.6
20Lee County44.8+1.9
21Linn County44.6+0.5
22Keokuk County44.4-1.5
23Dubuque County44.3-0.4
24Appanoose County44.3-3.1
25Floyd County44.2+0.9
26Dickinson County44.1+2
27Winneshiek County44+1
28Sac County44+0.1
29Winnebago County43.9+2.6
30Crawford County43.9-0.7
31Lucas County43.9-0.5
32Webster County43.8-1.2
33Delaware County43.7-0.1
34Dallas County43.5+0.4
35Humboldt County43.5-0.4
36Mills County43.5+2.4
37Adair County43.4-1.4
38Polk County43.3+0.1
39Ida County43.30
40Wright County43.2+0.8
41Fremont County43.2+2.9
42Clinton County43.2+0.2
43Wapello County43.1-0.5
44Pottawattamie County43+0.5
45Clayton County43+1.4
46Tama County43+0.3
47Marion County42.9+0.8
48Hamilton County42.9+0.2
49Woodbury County42.9+0.3
50Emmet County42.8+0.9
51Guthrie County42.7-0.1
52Louisa County42.6+0.9
53Mahaska County42.6-1.5
54Cherokee County42.4-0.2
55Ringgold County42.4+0.8
56Decatur County42.4+1
56Jasper County42.4-0.2
58Clay County42.4-0.9
59Franklin County42.1-0.5
60Palo Alto County42.1+0.5
61Union County42.1+0.1
62Allamakee County42+2.4
63Carroll County42-0.8
64Howard County41.9+3.9
65Audubon County41.9+3.5
66Jackson County41.7-0.2
67Buena Vista County41.7-0.7
68Mitchell County41.3+0.4
69Bremer County41.2+3
70Hancock County41+1.9
71Taylor County41+2
72Harrison County41-0.5
73Plymouth County40.8+0.3
74Hardin County40.8+0.2
75Greene County40.7+0.2
75Muscatine County40.7-2.1
77Butler County40.7-0.6
78Sioux County40.6+2.2
79Kossuth County40.6-0.4
80Boone County40.5-1.2
81Buchanan County40.4+0.2
82Osceola County40.4+1.5
83Worth County40.3+0.5
84Davis County40.1-0.7
85Pocahontas County40-0.8
86Monona County40-1.5
87Monroe County39.8+1.5
88Warren County39.7+0.1
89Henry County39.6-0.1
90O'Brien County39.6-0
91Jones County39.5-0.1
92Marshall County39.5-1.4
93Washington County39.4+1.4
94Chickasaw County39.2-0.8
95Benton County38.9-0.4
96Lyon County38.8+2.6
97Cedar County38.10
98Grundy County37.3-2.1
99Madison County37-4.6

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/2022/table-based-SF/data/5YRData/acsdt5y2022-b19083.dat. Retrieved 2026-10-10.

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Questions

Which county has the highest gini index?

Jefferson County, with 52.6 index in 2022, according to the U.S. Census Bureau.

Which county has the lowest gini index?

Madison County, with 37 index in 2022.

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 Iowa: more rankings