Data / Rankings / Gini index / Counties in Massachusetts

Counties in Massachusetts by gini index

Suffolk County had the highest gini index of 14 counties in 2021, at 52.8 index. Franklin County had the lowest, at 43.7 index. The median was 47.2 index and the figure for Massachusetts was 48.5 index. Source: the U.S. Census Bureau.

Highest52.8Suffolk County
Lowest43.7Franklin County
Median47.214 counties
Massachusetts48.5History

All counties, 2021

CSVChart (SVG)

Suffolk CountySuffolk County: 52.8 index52.8Dukes CountyDukes County: 52.6 index52.6Essex CountyEssex County: 48.2 index48.2Norfolk CountyNorfolk County: 48.1 index48.1Nantucket CountyNantucket County: 48 index48Berkshire CountyBerkshire County: 48 index48Hampden CountyHampden County: 47.5 index47.5Middlesex CountyMiddlesex County: 47 index47Barnstable CountyBarnstable County: 46.1 index46.1Hampshire CountyHampshire County: 46.1 index46.1Plymouth CountyPlymouth County: 46 index46Bristol CountyBristol County: 45.8 index45.8Worcester CountyWorcester County: 45.4 index45.4Franklin CountyFranklin County: 43.7 index43.7
index. Source: U.S. Census Bureau. Retrieved 2026-10-10.

Full ranking

RankCounties2021
index
1Suffolk County52.8
2Dukes County52.6
3Essex County48.2
4Norfolk County48.1
5Nantucket County48
6Berkshire County48
7Hampden County47.5
8Middlesex County47
9Barnstable County46.1
10Hampshire County46.1
11Plymouth County46
12Bristol County45.8
13Worcester County45.4
14Franklin County43.7

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/2021/table-based-SF/data/5YRData/acsdt5y2021-b19083.dat. Retrieved 2026-10-10.

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Questions

Which county has the highest gini index?

Suffolk County, with 52.8 index in 2021, according to the U.S. Census Bureau.

Which county has the lowest gini index?

Franklin County, with 43.7 index in 2021.

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 Massachusetts: more rankings