How many countries are included in the 2017 HDI?

The 2017 HDI covers 189 countries. A new addition is the Republic of the Marshall Islands. The wide coverage is the result of efforts by the Human Development Report Office (HDRO) to work with UN agencies and the World Bank, which provide internationally standardized data, and with national statistical agencies to obtain required development indicators for the HDI. For a full explanation of the results and methodology of the 2017 HDI and other composite indices, please see Technical Notes 1-6 at