Sarasin is a surname, originating (unrelatedly) in Switzerland and Thailand.
- Arsa Sarasin (born 1936), Thai diplomat and businessman
- Edouard Sarasin (1843–1917), Swiss scientist
- Fritz Sarasin (1859–1942), full name Karl Friedrich Sarasin, Swiss naturalist
- Jakob Sarasin (1742–1802), Swiss manufacturer and writer in the Age of Enlightenment
- Jean François Sarrazin (c. 1611–1654), or Sarasin, French author
- Kanit Sarasin (born 1964), Thai actor
- Pao Sarasin (1929–2013), Thai politician and policeman
- Paul Sarasin (1856–1929), full name Paul Benedict Sarasin, a Swiss naturalist
- Pong Sarasin (born 1927), Thai businessman and politician
- Pote Sarasin (1905–2000), Thai diplomat and politician
- Ronald A. Sarasin (born 1934), U.S. Representative from Connecticut
- Thian-hee Sarasin (1848–1925), Thai physician