Gini Coefficient of Household Income Inequality 2011-2013

Data Source: American Community Survey (ACS)

Gini Coefficient is a statistical measure that measures household income inequality within a society meaning it measures the extent to which income is distributed in an uneven manner among a population. It is a ratio and ranges between 0 in the case of perfect equality and 1 in the case of perfect inequality i. In other words, it measures the income gap between the wealthy and the poor.

From the map, we can see a high proportion of income inequality in counties within southern states compared to counties in Northern states. In addition, we see top known metropolitan counties have a higher proportion of household income inequality. For instance, both San Francisco and Los Angeles in California and cities such as Miami, in Miami-Dade County, and West Palm Beach, in Palm Beach county, in Florida.


[i] Organisation for Economic Co-operation and Development. “Income Inequality.” OECD 2016. Web. 14 April. 2017.