Harold Leventhal (May 24, 1919 – October 4, 2005) was an American music manager. He died in 2005 at the age of 86. His career began as a song plugger for Irving Berlin and then Benny Goodman where he connected with a new artist Frank Sinatra booking him as a singer for a Benny Goodman event. He managed The Weavers, Woody Guthrie, Pete Seeger, Alan Arkin, Judy Collins, Theodore Bikel, Arlo Guthrie, Joan Baez, Mary Travers, Tom Paxton, Don McLean and many others.