Don Chastain was an American actor, singer, and screenwriter. He worked in television in Los Angeles and New York and toured the United States and Canada. Chastain's Broadway credits include Parade (1998), 42nd Street (1980), It's a Bird...It's a Plane...It's Superman (1965), and No Strings (1961).

On television, Chastain appeared as Gerald Wiley in the episode "Trial by Rope" of the TV series Colt .45 in 1960. The guest cast also included Pamela Duncan as Dora Lacey, and Lurene Tuttle as Lottie Strong. Other series in which Chastain appeared as a guest star include The Real McCoys, Rhoda, Maude, The Rockford Files, All My Children, Hawaii Five-O, The West Wing, Gunsmoke, Scrubs, and The Big Valley.