Arnold Kaufmann (18 August 1911 – 15 June 1994) was a French engineer, professor of Applied Mechanics and Operations Research at the Mines ParisTech in Paris, at the Grenoble Institute of Technology and the Université catholique de Louvain, and scientific advisor at Groupe Bull. He is known for writing the first book on fuzzy sets, and as cofounder of the International Project Management Association.