U.S. Gini Index of Income Inequality

Gini Index Income Inequality

The Gini Index, or Gini coefficient, is a statistical measure of distribution that is often used to track economic inequality. It measures how wealth is distributed in a given population. The output is a value between 0 and 1. 

Higher values mean greater inequality. A Gini value of 0 means a perfectly equal society, where everyone's income is the same. A value of 1, on the other hand, represents perfect inequality—a society in which only one person or group has all the wealth. The Gini Index data in this article is reported by the American Community Survey

National Gini value, 2016:

0.47

—American Community Survey

No Equality in Income Inequality

How does the Gini Index vary by state?

In 2016 New York, had the highest level of income inequality, with a Gini value of 0.51. Alaska had the lowest, with a Gini value of 0.41. To see data for different years, use the time-slider beneath the map.

How has the Gini Index changed over time in each state?

This visualization shows the change in the Gini index value between 2010 and 2016. in addition to having the lowest income inequality in 2016, Alaska is the only state that has seen a decrease in its Gini value during this period. .