Snodgress made her big screen debut in "Rabbit, Run" in 1970 before starring in the "Diary of a Mad Housewife," for which she won two Golden Globe awards and an Oscar nomination, the BBC reported.
She left Hollywood in 1971 to live with rock star Neil Young and gave birth to their son, Zeke, who has cerebral palsy.
Snodgress attempted to return to acting in the late 1970s, but she said it was hard. She appeared opposite Kirk Douglas in 1978's "The Fury," in "Pale Rider" with Clint Eastwood, and "Murphy's Law" with Charles Bronson, as well as in supporting roles in the teen thrillers "Wild Things" and "The Forsaken."
She had a relationship with songwriter Jack Nitzsche, who in 1979, threatened to kill her after beating her with a handgun. He pleaded guilty and received three years' probation.
Snodgress is survived by her son Zeke.