The Music for the Requiem Mass is any music that accompanies the Requiem, a Mass in the Catholic Church for the deceased. It has inspired a large number of compositions, including settings by Mozart, Berlioz, Donizetti, Verdi, Bruckner, Saint-Saëns, Dvořák, Fauré and Duruflé. Originally, such compositions were meant to be performed in liturgical service, with monophonic chant. Eventually the dramatic character of the text began to appeal to composers to an extent that they made the requiem a genre of its own, and the compositions of composers such as Verdi are essentially concert pieces rather than liturgical works.

A Requiem or Requiem Mass, also known as Mass for the dead or Mass of the dead, is a Mass of the Catholic Church offered for the repose of the soul or souls of one or more deceased persons, using a particular form of the Roman Missal. It is usually celebrated in the context of a funeral.