Ian McDougall (born 1935 in Hobart) is an Australian geologist and geochemist. McDougall studied at the University of Tasmania and Australian National University, before taking up a research position at ANU. He is a Fellow of the Geological Society of America, the Australian Academy of Science, and the American Geophysical Union. McDougall has also served as Vice President of the International Association of Volcanology and Chemistry of the Earth's Interior.