Oscar Rabin (26 April 1899 – 20 June 1958) was a Latvian-born English bandleader and musician.
Rabin was born in Riga to a family of Jewish origin, and came to London, England as a child.
At 15 he became a professional musician, he then worked in theatre orchestras and attended the Guildhall School of Music.
His career was interrupted by service in the First World War, then in 1922 he formed an ensemble with Harry Davis.
He formed the Oscar Rabin Band (see main article) but was not the leader on stage as he preferred to play the bass saxophone.