Greenwald is a surname. Notable people with the surname include:
Greenwald family, the rabbinic family of Puppa (Hasidic dynasty), originated from HungaryAlex Greenwald (born 1979), American musician and actorAndy Greenwald (born 1977), social commentator, specifically about popular musicBruce Greenwald (born 1946), American economistGlenn Greenwald (born 1967), attorney, journalist, blogger, author of books, NSA criticHank Greenwald (born 1935), former baseball announcerHerbert Greenwald (1915–1959), real estate developer associated with Mies Van Der RoheJeff Greenwald (born 1954), author, performer, and Executive Director of Ethical TravelerLouis Greenwald (born 1967), New Jersey, USA politicianMaggie Greenwald (born 1955), American film director and writerMichael Greenwald, birth name of Michael Kidd (1915–2007), American film and stage choreographerMoshe Greenwald (1853–1911), Rabbi of Chust, Hungary, and author of Arugas Habosem, a book of responsaNora Greenwald (born 1977), also known as Molly Holly, American professional wrestlerRobert Greenwald (born 1945), American film director, film producer, and political activist