Olivier Le Fèvre (1960 – 2020) was a French astrophysicist who studied galaxies using multi-object spectroscopy.

[3] He then worked as a resident astronomer at the Canada–France–Hawaii Telescope,[2] before moving to Paris Observatory in 1994, until moving to the Laboratory of Astrophysics at the Aix-Marseille University in 1997,[1] subsequently serving as its director between 2004 and 2011.

[6] He used multi-object spectroscopy to study galaxy evolution and formation, and the large-scale structure of the Universe.

He started the Canada-France Redshift Survey with the MOS-SIS multi-object spectrograph on the Canada–France–Hawaii Telescope.

He was the principal investigator of the Visible Multi Object Spectrograph on the Very Large Telescope, and spent over 15 years using it to observe galaxies.