"Mountain Sound" is a single by the Icelandic indie folk/indie pop band Of Monsters and Men. The song was released as the second single from the international version of their debut studio album, My Head Is an Animal. It was written by Arnar Rósenkranz Hilmarsson, Nanna Bryndís Hilmarsdóttir and Ragnar Þórhallsson; and produced by Jacquire King.