Emmanuel Breuillard (born 25 June 1977) is a French mathematician.^[1] He was the Sadleirian Professor of Pure Mathematics^[2] in the Department of Pure Mathematics and Mathematical Statistics (DPMMS) at the University of Cambridge, and is now Professor of Pure Mathematics at the Mathematical Institute, University of Oxford as of January 1, 2022.^[3] He had previously been professor at Paris-Sud 11 University.

In 2012, he won an EMS Prize for his contributions to combinatorics and other fields. His area of research has been in group theoretic aspects of geometry, number theory and combinatorics. In 2014 he was an invited speaker at the International Congress of Mathematicians in Seoul.