Pierre Pansu (born 13 July 1959) is a French mathematician and a member of the Arthur Besse group and a close collaborator of Mikhail Gromov. He is a professor at the Université Paris-Sud 11 and the École Normale Supérieure in Paris. His main research field is geometry. His contribution to mathematics was celebrated by a double event (a conference and a workshop)^[2] co-organized for his 60th birthday by the Clay Mathematics Institute.

Pierre Pansu is the grandson of French physician Félix Esclangon [fr], and the great grand-nephew of mathematician and astronomer Ernest Esclangon, inventor of the talking clock, and brother of Robert Pansu, chemist and research director at CNRS.

• Metric Structures for Riemannian and Non-Riemannian Spaces
• Pansu derivative

• Pansu, Pierre (1989), "Métriques de Carnot-Carathéodory et quasiisométries des espaces symétriques de rang un", Annals of Mathematics, 129 (1): 1–60, doi:10.2307/1971484, JSTOR 1971484.
• Prix Georges Charpak 2013, [1], Académie des Sciences, France.

• Pansu's website at Université Paris-Sud 11
• Pierre Pansu at the Mathematics Genealogy Project
• Pierre Pansu's results at International Mathematical Olympiad