Robert Sherwood Haggart (March 13, 1914[1] – December 2, 1998)[2] was an American dixieland jazz double bass player, composer, and arranger.

He remained with the band until it dissolved in 1942,[1] then began working as session musician, with much of his time spent at Decca Records.

[3] He recorded with Billie Holiday, Duke Ellington, Benny Goodman, and Ella Fitzgerald; his arrangements can be heard on Fitzgerald's album Lullabies of Birdland.

Haggart also starred in several commercials for L&M cigarettes on the radio program "Gunsmoke", including the March 4, 1956, episode, "The Hunter".

[1] He appeared at jazz festivals until his death on December 2, 1998, in Venice, Florida.