Eugenio Calabi is a mathematician and professor emeritus at the University of Pennsylvania, specializing in differential geometry, partial differential equations and their applications.

Professor Calabi was a Putnam Fellow as an undergraduate at MIT in 1946. In 1950 he received his Ph.D. from Princeton University, where his advisor was Salomon Bochner. He later obtained a professorship at the University of Minnesota.

In 1964, Calabi joined the mathematics faculty at the University of Pennsylvania. Following the retirement of the great German-American mathematician, Hans Rademacher, from Penn, he was appointed to the Thomas A. Scott Chair of Mathematics at the University of Pennsylvania in 1967. He won the Steele Prize from the American Mathematical Society in 1991 for his work in differential geometry. In 1994, Professor Calabi assumed emeritus status.

His work on Kähler metrics led to the development of the Calabi-Yau manifold, for which his name is most recognized.