Mina Spiegel Rees (August 2, 1902, Cleveland, Ohio – October 25, 1997, New York City) was an American mathematician.
She was the first female President of the American Association for the Advancement of Science (1971) and head of the mathematics department of the Office of Naval Research of the United States.
Rees was a pioneer in the history of computing and helped establish funding streams and institutional infrastructure for research.
Rees was also the founding president and president emerita of the Graduate School and University Center at CUNY.
She received the Public Welfare Medal, the highest honor of the National Academy of Sciences; the King's Medal for Service in the Cause of Freedom (UK) and at least 18 honorary doctorates.