The Group of Thirty, often abbreviated to G30, is an international body of financiers and academics which aims to deepen understanding of economic and financial issues and to examine consequences of decisions made in the public and private sectors.

[5] It first met in 1963, at the Rockefeller Foundation Center (Villa Serbelloni) in Bellagio,[6] to investigate international currency problems, particularly the balance of payments crisis which America faced throughout the early 1960s.

In June 2011, the group released a report that examines the 2008 financial crisis, including the causes, the responses and the future outlook for the United States and other markets.

[7] In January 2018, the European Ombudsman Emily O'Reilly requested that ECB President Mario Draghi resign from the group because his membership in the organization could be interpreted as undue influence.

It holds two full meetings each year and also organises seminars, symposia, and study groups.