Lê Dũng Tráng, (born 1947 in Saigon) is a Vietnamese-French mathematician.
He obtained a Ph.D. degree at the University of Paris in 1969 and 1971 under the supervision of Claude Chevalley and Pierre Deligne.
From 2002 to 2009 he headed the department of mathematics at the International Centre for Theoretical Physics (ICTP), in Trieste, Italy.
He is particularly concerned with singularity theory in the complex domain (Milnor fibrations, perverse sheaves).
In 2000 he was involved in promoting scientific exchange between the United States and Vietnam.