Wilhelm Franz Josef Kosch (2 October 1879 – 20 December 1960) was a German historian of literature and theatre and lexicographer.
The lexicon that he conceived and later revised several times, the Deutsches Literatur-Lexikon is a references in the field of German literature.
Born in Drahany in Mähren, Kosch died in Vienna in 1960 at age 81.