How many countries are included in the 2015 HDI?

The 2015 HDI covers 188 countries. The wide coverage is the result of efforts by the Human Development Report Office (HDRO) to work with UN agencies and the World Bank, who provide internationally standardized data and also with national statistical agencies to obtain required development indicators for the HDI. For a full explanation of the results and methodology of the 2015 HDI and other composite indices in the 2015 Human Development Report, please see Technical Notes 1-7.