Sass or Saß is a surname which may refer to:

• A. J. Sass, American author
• Anatoliy Sass (born 1935), Russian Olympic rower
• Dawn Marie Sass (born 1959), American politician who was elected Treasurer of Wisconsin in 2006
• Else Kai Sass (1912–1987), Danish art historian
• Evelyn Handler (1933–2011), née Sass, first American woman to be named president of a publicly supported land grant university
• Hans-Martin Sass (born 1935), German bioethicist and Professor of Philosophy
• Henry Sass (1788–1844), English artist and teacher of painting who founded an important art school in London
• Jonathan Sass (born 1961), American jazz tuba player and composer
• Katrin Sass (born 1956), German actress, best known for playing Christiane Kerner in the film Goodbye Lenin
• Louis Sass (born? still living) Professor of Clinical Psychology
• Katrina Von Sass (born 1972), Canadian Olympic volleyball player
• Paul Sass, English mixed martial arts fighter
• Richard Sass (1774–1849), English landscape painter, etcher, and drawing master to royalty
• Sylvia Sass (born 1951), Hungarian operatic soprano
• Theodor von Sass (1881–1958), a German Lutheran pastor and community leader