Peter G. Casazza, born June 28, 1945, in Albany, New York, is an American mathematician, presently working at the University of Missouri. He began his career as a Banach space theorist, but he is perhaps most well known for his role in the development of frame theory as a popular discipline of mathematical research.
Casazza has over 100 publications, several of which are coauthored with his wife, Janet Tremain.
He is an active mathematical researcher and currently runs the Frame Research Center in Columbia, Missouri.