Greenbaum is a surname. Notable people with the surname include:
Andrew Britt Greenbaum
Daniel "Dan" Robert Greenbaum (born 1969), an American volleyball player
Gus Greenbaum, American gangster
Harrison Greenbaum (born 1986), an American stand-up comedian and comedy writer
Joanne Greenbaum, New York Artist
Mutz Greenbaum German cinematographer
Norman Greenbaum, American singer-songwriter
Sidney Greenbaum (1929 - 1996), a British scholar of the English language and linguistics
Yitzhak Greenbaum
