"If I Should Lose You" is a 1936 song with music by Ralph Rainger and lyrics by Leo Robin. It was introduced in the Paramount film Rose of the Rancho, directed by Marion Gering and adapted from a Broadway show by David Belasco and Richard Walton Tully. The original performance is credited to Gladys Swarthout and John Boles. Recordings by Isham Jones and Freddy Martin appeared in 1935, and Harry Richman recorded it in 1936. Later versions include those by Charlie Parker with Strings, Peggy Lee, Shirley Horn, Hank Mobley, Julie London, Dinah Washington, Nina Simone, Oscar Peterson, Carmen McRae and George Shearing, Frank Sinatra, Keith Jarrett and McCoy Tyner. The song has become a jazz standard, and it is widely performed by jazz musicians.
