Constantine Michael Dafermos (Greek: Κωνσταντίνος Δαφέρμος; born May 26, 1941, Athens) is a Greek-American applied mathematician. He received a Diploma in Civil Engineering from the National Technical University of Athens (1964) and a Ph.D. in Mechanics from Johns Hopkins University under the direction of Jerald Ericksen (1967). He has been an Assistant Professor at Cornell University (1968-1971) and an Associate Professor (1971-1975) and Professor (1975-) in the Division of Applied Mathematics at Brown University. Since 1984, he has been the Alumni-Alumnae University Professor at Brown.
In recent years, his research has focused on nonlinear hyperbolic systems of conservation laws whose solutions spontaneously develop singularities propagating as shock waves. In particular, he is studying the interplay between thermodynamics and analysis in the theory of these systems and he is analyzing the fundamental role of entropy as a stabilizing agent.
- Honorary Doctorate, University of Athens, 1987.
- Honorary Doctorate, National Technical University (Greece), 1991.
- Honorary Doctorate, University of Crete, 2001.
- SIAM W.T. and Idalia Reid Prize, 2000.
- Norbert Wiener Prize in Applied Mathematics, 2016 
- Fellow American Academy of Arts and Sciences, 2001-.
- Correspondent Member, Academy of Athens, 1988-.
- Honorary Professor, Academia Sinica, China, 2004-.
- Member, Board of Governors, Weizmann Institute of Science (Israel), 1995-.
- "CV" (PDF). Constantine Dafermos. Retrieved 2009-07-21.
- List of Fellows of the American Mathematical Society, retrieved 2012-11-10.
- National Academy of Sciences Members and Foreign Associates Elected, News from the National Academy of Sciences, National Academy of Sciences, May 3, 2016, retrieved 2016-05-14.
- Norbert Wiener Prize in Applied Mathematics 2016
- Brown University, The Division of Applied Mathematics (http://www.dam.brown.edu/)