David Conlon (born 1982) is an Irish mathematician who is currently a Professor of Mathematics at Caltech. He represented Ireland in the International Mathematical Olympiad in 1998 and 1999. He was an undergraduate in Trinity College Dublin, where he was elected a Scholar in 2001 and graduated in 2003. He earned a Ph.D. from Cambridge University in 2009. In 2019 he moved to Caltech, having been a fellow of Wadham College, Oxford and Professor of Discrete Mathematics in the Mathematics Institute at the University of Oxford. His research interests are in Hungarian-style combinatorics, particularly Ramsey theory, extremal graph theory, combinatorial number theory, and probabilistic methods in combinatorics.