| Olivier Kahn | |
| Birth Place: | Paris, France |
| Death Place: | Paris, France |
| Nationality: | French |
| Alma Mater: | Chimie ParisTech |
| Occupation: | Chemist |
| Relatives: | Jean-François Kahn, Axel Kahn (brothers) |
Olivier Kahn (13 September 1942 – 8 December 1999) was a French chemist. He was the brother of the geneticist Axel Kahn and the journalist Jean-François Kahn.
Kahn studied at Chimie ParisTech in Paris and received his PhD for work on metal-organic compounds with Michaël Bigorgne in 1969. After a postdoctoral position at the University of East Anglia with Sydney Kettle he became professor at the University of Paris-Sud in 1976. He stayed there until he changed position and became professor at the University of Bordeaux in 1995. He held that position until his death in 1999.