Joyce Jillson (December 26, 1946—October 1, 2004) was a syndicated astrologer. At the time of her death, her column was syndicated to over 200 publications.

Born in Cranston, Rhode Island, Jillson originally pursued a career in the performing arts. She attended Boston University on an opera scholarship. After graduation, she moved to New York to act. Her acting career includes appearing on Broadway in "The Roar of the Greasepaint, the Smell of the Crowd" and a stint as "Jill Smith" on the television series Peyton Place. In 1973, she started doing horoscopes for a local TV station in Los Angeles.

Jillson was probably most famous for providing horoscopes for U.S. President Ronald Reagan and First Lady Nancy Reagan. She reportedly advised them to select George Bush as Reagan's running mate. She was also the official astrologer for 20th Century Fox Studios, providing advice on the best opening dates for movies (including Star Wars).

Jillson was married to Joseph Gallagher from 1969 to 1981.

She died of kidney failure at Cedars-Sinai Medical Center. She had been suffering from diabetes.