The music soundtrack of the Fallout series is composed of both licensed music from the mid-century's Jazz Age to the Space Age, as well as original scores by Mark Morgan, Matt Gruber, Devin Townsend, Inon Zur, and Ramin Djawadi. The series also features original songs and covers commissioned for the games as diegetic music heard in the world of Fallout.
Much of the licensed music used in the Fallout series includes popular hits recorded in the 1940s and 1950s in accordance with its atompunk retrofuturistic setting influenced by the post-war culture of 1950s United States in a post-apocalyptic version of the 21st, 22nd and 23rd centuries. However, with the introduction of 2010's Fallout: New Vegas, the Fallout series has also featured licensed recordings from each of nine consecutive decades from the 1920s to the 2000s.