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List of countries by income equality

This is a list of countries or dependencies by income inequality metrics, including Gini coefficients. The Gini coefficient is a number between 0 and 1, where 0 corresponds with perfect equality (where everyone has the same income) and 1 corresponds with perfect inequality (where one person has all the income—and everyone else has zero income). Income distribution can vary greatly from wealth distribution in a country (see List of countries by distribution of wealth). Income from black market economic activity is not included and is the subject of current economic research.

R/P 10%: The ratio of the average income of the richest 10% to the poorest 10%
R/P 20%: The ratio of the average income of the richest 20% to the poorest 20%
Gini: Gini index, a quantified representation of a nation's Lorenz curve
UN: Data from the United Nations Development Programme.
CIA: Data from the Central Intelligence Agency's The World Factbook.