David Gries (born April 26, 1939 in Flushing, Queens, New York) is an American computer scientist at Cornell University, United States mainly known for his books The Science of Programming (1981) and A Logical Approach to Discrete Math (1993, with Fred B. Schneider). He was Associate Dean for Undergraduate Programs at the Cornell University College of Engineering from 2003–2011. His research interests include programming methodology and related areas such as programming languages, related semantics, and logic. His son, Paul Gries, has been a co-author of an introductory textbook to computer programming using the language Python and is a professor teaching Stream in the Department of Computer Science at the University of Toronto.