David Michael Avis (born March 20, 1951) is a Canadian and British computer scientist known for his contributions to geometric computations.

Avis is a professor in computational geometry and applied mathematics in the School of Computer Science, McGill University, in Montreal.

Since 2010, he belongs to Department of Communications and Computer Engineering, School of Informatics, Kyoto University.

Writing with Komei Fukuda, Avis proposed a reverse-search algorithm for the vertex enumeration problem; their algorithm generates all of the vertices of a convex polytope.

This article about a United Kingdom mathematician is a stub.