Musiri Subramania Iyer (9 April 1899 – 25 March 1975) was a Carnatic vocalist whose stage performing career spanned the 1920s to the 1940s. After retirement from the stage, he remained an iconic figure in Carnatic music as a dedicated teacher and leader in the Carnatic community. His bhava-laden renditions of Carnatic songs have become the measuring stick for generations of Carnatic vocalists. Musiri Subramania Iyer is considered one of the giants of Carnatic music in the twentieth century.