American Geophysical Union
- Country: United States
- Type: Science
- Website: www.agu.org
- Update: 05-02
American Geophysical Union (AGU) is a non-profit geophysical organization founded in 1919 and headquartered in Washington, D.C. It has more than 50,000 members from more than 100 countries and regions around the world. The main research areas of American Geophysical Union include atmospheric and oceanic sciences, solid earth sciences, space sciences, hydrology and so on.