Bast is a surname. Notable people with the surname include:
Dieter Bast (born 1951), German footballer Jason Bast (born 1989), Canadian ice hockey player Joseph Bast (born 1958), CEO of the Heartland Institute Ørnulf Bast (1907–1974), Norwegian sculptor and painter Ryan Bast (born 1975), Canadian ice hockey player William Bast (1931–2015), American screenwriter and writer