Joseph Ira Dassin (5 November 1938 – 20 August 1980) was an American–French singer-songwriter and actor. He was the son of film director Jules Dassin.

Dassin was born in New York City to American film director Jules Dassin (1911–2008) and Béatrice Launer (1913–1994), a New York-born violinist, who after graduating from a Hebrew High School in the Bronx studied with the British violinist Harold Berkely at the Juilliard School of Music. His father was of Ukrainian-Jewish and Polish-Jewish extraction, his maternal grandfather was an Austrian-Jewish immigrant, who arrived in New York with his family at age 11. Dassin lived in New York City and Los Angeles until his father fell victim to the Hollywood blacklist in 1950, at which time his family moved to Europe.