Nacio Herb Brown (22 February 1896 - 28 September 1964) was a United States songwriter.

Brown was born as Ignacio Herb Brown in Deming, New Mexico. He graduated from the University of California, Los Angeles.

He was a successful writer of popular songs, and Broadway theater music in the 1920s, originally doing this as a sideline to his financially successful career in California real estate. In 1928 he was hired to work in Hollywood by MGM and write movie music for the new medium of sound film. For his film work, he often collaborated with lyricist Arthur Freed.

He appears in the film The Hollywood Revue of 1929.

In the 1930s he was married to actress Anita Page.

Brown's hits included "Fit as a Fiddle and Ready for Love", "Pagan Love Song", "Singin' in the Rain" "Wedding of the Painted Doll", and "You Are My Lucky Star".

Nacio Herb Brown died in San Francisco, California.

Brown is an inductee of the Songwriters Hall of Fame.