Buday Dénes (Denes von Buday) was a Hungarian composer, born in Budapest.

[1] He was a well known composer of both poems and music for films made between 1930 and 1950.

[2] Buday studied at the Academy of Music, which is today known as the Franz Liszt Academy of Music, where his teacher, Hans von Koessler, held his lectures in German.

Buday's only opera, the comedy Loreley, premiered in 1919 in Vienna.

Buday authored many operettas and musical comedies, which were shown on stage between 1916 and 1947.