Freydoon Shahidi (born June 19, 1947) is an Iranian American mathematician who is a Distinguished Professor of Mathematics at Purdue University in the U.S.
He is known for a method of automorphic L-functions which is now known as the Langlands–Shahidi method.
He is a member of the American Academy of Arts and Sciences since 2010.
In 2012 he became a fellow of the American Mathematical Society.