The World Income Inequality Database (WIID) presents information on income inequality for developed, developing, and transition countries. It provides the most comprehensive set of income inequality statistics available and can be downloaded for free.
WIID4, released in December 2018, covers 189 countries (including historical entities), with over 11,000 data points in total. With the current version, the latest observations now reach the year 2017. The data can be downloaded here. WIID4 is also available in the interactive visualization tool.
Theme: 2014-2018, Inclusion