Suzanne Yvette O'Reilly AM FAA FRSN (born 3 February 1946) is an Australian professor of geology noted for her pioneering contributions to mapping the deep Earth with an interdisciplinary approach. In 2007, the Royal Society of New South Wales awarded her the Clarke Medal for outstanding contributions to Australian geology. She has over 350 peer-reviewed publications with over 40,000 citations (November 2022), and has supervised more than 40 PhD students to graduation.