Stacey Nelkin (born September 10 1959) is an American film and television actress. She is well known for her role in the 1982 horror film Halloween III: Season of the Witch as Ellie Grimbridge. Her best-known TV role is on the soap opera Generations as Christy Russell in 1990. She also starred as Bonnie Sue Chisholm in four 1979 episodes of the CBS western miniseries The Chisholms. When the series resumed in 1980, she was replaced by Delta Burke in the role of Bonnie Sue.

Nelkin was scheduled to appear in the 1982 cult film Blade Runner as Mary, the sixth replicant who was a member of the Nexus 6, but the film's budget escalated and her part was cut before the film started shooting. Nelkin has made guest appearances in several TV series, including CHiPs, The A-Team, Eight Is Enough, 1st & Ten and Hunter. Nelkin had a screen test for the role of Pris in the 1982 movie Blade Runner, but Daryl Hannah got the part instead. Nelkin's screen test appears on Disc 4 of the collector's edition DVD set.

Nelkin was married to actor Barry Bostwick from 1987 to 1991.