Léon van Hout (28 November 1864 in Liège – 23 November 1945 in Brussels) was a Belgian violist and music educator.
From 1888 to 1894 van Hout was the violist of the Ysaÿe Quartet along with cellist Joseph Jacob, and violinists Mathieu Crickboom and Eugène Ysaÿe. He was principal violist of the Théâtre Royal de la Monnaie from 1889.
Van Hout was professor of viola at Royal Conservatory of Brussels from 1893. He taught a generation of Belgian violists including Robert Courte, who succeeded him at the Conservatory, Charles Foidart, Lionel Blomme, and Gaston Jacobs. Van Hout inspired many Belgian composers to write works for the viola.
Concerto for viola and orchestra, Op. 54 (1942)
Suite for viola and orchestra, Op. 67 (1940)
Double Concerto in E major for viola, piano and orchestra, Op. 34 (1946)
Quartet for 4 violas, Op. 24 (1942)
Pastourelle for viola and piano (1934)
Sonatine for flute and viola (1934)
Concerto No. 1 in G minor for viola and orchestra, Op. 13
Suite Polonaise for viola (viola alta) and piano (1896)