Astin is a surname. Notable people with the surname include:
Alexander Astin (born 1932), US education professor emeritus
Ali Astin (born 1996), US actor, singer-songwriter, voice artist, and model; daughter of Sean Astin
Allen V. Astin (1904–1984), US physicist and director of the National Institute of Standards and Technology
Anne Astin, Australian biochemist and forensic expert
Helen Astin (born 1932), Greek-born US education professor emerita
James Astin (1900–?), English footballer
John Astin (born 1930), US actor and acting teacher
Mackenzie Astin (born 1973), US actor and son of John Astin and Patty Duke
Patty Duke Astin, now known as Patty Duke (born 1946), US actor, singer, author, and mental health advocate; ex-wife of John Astin
Sean Astin (born 1971), US actor, director, producer, and voice artist; son of Patty Duke; adopted son of John Astin
Skylar Astin (born 1987), US actor and musician
Jan Rek ter'Astin, a character in the fictional Liaden universe
Dr. Robert Astin, a character in the television series Quincy, M.E.
Astin Wikipedia (Text) CC BY-SA