The Kimberley Process Working Group on Statistics (WGS) ensures timely reporting and analysis of statistical data on the production and trade of rough diamonds. By doing this, it can identify anomalies and ensure the effective implementation of the scheme.

Chair The United States of America  
Vice Chair India  
Members Angola, Botswana, Canada, the Democratic Republic of Congo, the European Union, GhanaIsrael, LesothoPeople's Republic of China, the Russian Federation, South Africa, Switzerland, the United Arab Emirates, World Diamond Council, Civil Society Coalition   
2018 Ghana and Lesotho were accepted as full  members after one year as provisional member.  
2009 The United States of America took over the chairmanship from Canada.