Fabrice Bethuel (born 7 June 1963) is a French mathematician. He holds a chair at Paris VI University.
Bethuel earned his doctorate at Paris-Sud 11 University in 1989, under supervision of Jean-Michel Coron. He won the 1999 Fermat Prize, jointly with Frédéric Hélein, for several important contributions to the theory of variational calculus. He also won the 2003 Prix Mergier-Bourdeix for his fundamental discoveries at the interface between analysis, topology, geometry, and physics.