Lew Pollack (16 June 1895 – 18 January 1946) was a song composer active during the 1920s and the 1930s.
Pollack was born in New York. Among his best known songs are "Charmaine" and "Diane" with Ernö Rapée, "Miss Annabelle Lee", "Two Cigarettes in the Dark", "At the Codfish Ball" (from the Shirley Temple movie "Captain January" with Buddy Edsen), and Go In and Out The Window, now a children's music standard. He also collaborated with Paul Francis Webster, Sidney Clare, Ned Washington and Jack Yellen, amongst others. In 1914 he wrote "That's a Plenty", a rag that became an enduring Dixieland standard. He died in Hollywood.
Lew Pollack was elected to the Songwriters Hall of Fame in 1970.