List the members of G7, G8, and G20.

The Group of Seven (G7) is a group consisting of: Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States.

The Group of Eight (G8) members include: Canada, France, Germany, Italy, Japan, United Kingdom, and the United States. Russia was removed in 2014, making it again the G7.

The European Union has participated fully in the G7 since 1981 as a “nonenumerated” member.

The Group of Twenty (G20) members include (as of 2017): Argentina, Australia, Brazil, Canada, China, the European Union, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, the United Kingdom, and the United States.