Family
- son David Astin:
- son Allen J Astin: born on March 23, 1961
- son Thomas E Astin: born on March 19, 1965
- son Sean Astin: born on February 25, 1971; mother, Patty Duke; father, Michael Tell; for years it was thought that Astin was Sean's father but genetic testing proved otherwise
- son Mackenzie Astin: born on May 12, 1973; mother, Patty Duke
- mother Margaret Linnie Astin:
- father Allen Varley Astin:
Companions
- wife : divorced; mother of Astin's three older sons
