Louis Charles Trabut (12 July 1853 – 25 April 1929) was a French botanist and physician who was a native of Chambéry, department of Savoie.
He is remembered for his work involving the flora of Algeria and Tunisia.
Trabut was a professor of natural history at the Faculty of Medicine and Pharmacy of Algiers, and also a consultant physician to the Mustapha Pacha hospital.
With botanist Jules Aimé Battandier (1848–1922), he published several works on Algerian flora, that included the following: In 1881, mycologists Pier Andrea Saccardo and Casimir Roumeguère published a fungal genus (in the family Phyllachoraceae), Trabutia, which was named after Trabut.
Lastly, Joanne E.Taylor, K.D.Hyde & E.B.G.Jones in 2003 published Tribulatia which is a monotypic genus of fungi in the family Phyllachoraceae.