Greenstreet is a surname which may refer to: Ivor Greenstreet (born 1966), Ghanaian lawyer and politician Lionel Greenstreet (1889–1979), British sailor and trans-Antarctic explorer Mark Greenstreet (born 1960), English actor Steven Greenstreet (born 1979), American documentary filmmaker Sydney Greenstreet (1879–1954), English character actor (known for performances in The Maltese Falcon and Casablanca)