The following chart shows the ratio of the average income of the richest 10% to the poorest 10% in OECD countries based on the latest data available:

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Source: OECD

Income inequality is the highest in Mexico followed by Chile. However these are emerging countries. Among the developed countries, the U.S. has the highest income inequality. Northern neighbor Canada ranks better in income equality.Highly socialist Scandinavian countries have lower income inequality than other developed OECD countries.