Greenblatt or Greenblat (Yiddish: "green leaf") is a surname. Notable people with the surname include:
C. H. Greenblatt (born 1972), writer and storyboard artist, most notably for SpongeBob SquarePants
Jack Greenblatt, Canadian scientist
James Marshall, actor, born James David Greenblatt
Joel Greenblatt, American financier
Jonathan Greenblatt, co-founder, Ethos Water
Richard Greenblatt (programmer), American computer programmer
Richard Greenblatt (playwright), Canadian actor/playwright
Robert Greenblatt, television executive and chairman of NBC Entertainment
Rodney Greenblat, Americal graphic artist
Shon Greenblatt, American actor
Stephen Greenblatt, New Historicist literary critic and theorist
