Kathleen Sky (born 5 August 1943; age 73), also known as Kathleen Sky-Goldin, is a Star Trek author and appeared as an Enterprise crewmember in the recreation deck scenes in Star Trek: The Motion Picture.

Born as Kathleen Mckinney in Alhambra, California, she was married to Karl Sky and later to author Stephen Goldin between 1972 and 1982.