David Robert Morrison (born July 29, 1955, in Oakland, California) is an American mathematician and theoretical physicist.
He works on string theory and algebraic geometry, especially its relations to theoretical physics.
While at Duke, Morrison advised multiple PhD students, including Antonella Grassi and Carina Curto.
He works on the interfaces and mutual fertilization of algebraic geometry and string theory, especially mirror symmetry.
Morrison was an invited speaker at the International Congress of Mathematicians in Zürich in 1994 (Mirror Symmetry and Moduli Spaces of Superconformal Field Theories).