Published by The United Nations University World Institute for Development Economics Research

The World Income Inequality Database (WIID) presents information on income inequality for most countries and historical entities. It provides the most comprehensive set of income inequality statistics available and can be downloaded for free. ​

This page hosts the latest version of WIID, but also the WIID Companion datasets which report standardized WIID data to create more comparable country level inequality series, inequality indices, and complete country and global income distributions for the longest periods possible. The WIID Companion datasets are directly accessible in real time through our WIID Explorer, a powerful tool for accessing and analysing the most comprehensive collection of comparable income inequality statistics in the world.