Casimir Mondon-Vidailhet (February 1, 1847 - November 30, 1910) was a French journalist, philologist and author.
François Marie Casimir Mondon-Vidailhet was born in Saint-Gaudens, in Haute-Garonne.
He was journalist for Le Temps. In this role, he left France for Ethiopia in 1891, and stayed there from 1892 to 1893 and from 1894 to 1897.
He was professor at École nationale des langues orientales vivantes, where he was the first occupant of the chair of Amharic, which he taught from 1898 to 1910. He was succeeded by Marcel Cohen.
Works by Mondon-Vidailhet include: