John Emory Dennis, Jr. (born 1939), is a renowned American mathematician with major contributions in mathematical optimization. Dennis is currently a Noah Harding Professor Emeritus and Research Professor in the Department of Computational and Applied Mathematics at Rice University in Houston, Texas. His research interests include Optimization in Engineering Design.
- B.S.I.E. (1962) Engineering, University of Miami, Florida
- M.S. (1964) Mathematics, University of Miami, Florida
- Ph.D. (1966) Mathematics, University of Utah. Dissertation: "Variations on Newton's Method"