Ernst Hess (13 May 1912 – 2 November 1968) was a Swiss conductor, composer and musicologist.
Born in Schaffhausen, Hess studied at the conservatory of Zurich from 1932 and 1934, and then at the Ecole Normale de Musique de Paris, with Paul Dukas and Nadia Boulanger among others.
In 1938, he was appointed lecturer of music theory at the conservatory of Winterthur.
As a composer, he wrote mostly sacred and secular choral music, namely the oratorio Jeremia.
Hess died in Egg and is buried at the Fluntern Cemetery in Zürich.