# U.S. Gini Index of 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 (ACS).

*How has the U.S. Gini Index changed over time?*

*How does the U.S. Gini Index vary by state?*

In 2017 New York, had the highest level of income inequality, with a Gini value of 0.52. Alaska and Utah had the lowest, with a Gini Index of 0.42.

**Note**: Hover over a state to see its Gini index. To view data from different years, use the time-slider beneath the charts.