Barbara Rush (January 4, 1927 – March 31, 2024) was an American actress of stage, screen and television. In 1954, she won the Golden Globe Award for most promising female newcomer for her role in the 1953 American science fiction film It Came from Outer Space. Later in her career, Rush became a regular performer in the television series Peyton Place and appeared in TV movies, miniseries and a variety of other programs, including the soap opera All My Children and the family drama 7th Heaven as well as starring in films such as The Young Philadelphians, The Young Lions, Robin and the 7 Hoods and Hombre.

She played Leonora Edmond in the original series episode "The Forms of Things Unknown" and Barbara Matheson in the revival series episode "The Balance of Nature".

Along with Leonard Nimoy, Cliff Robertson, David McCallum (who appeared with her in "The Forms of Things Unknown") and Peter Breck, she was one of only five actors to appear in both the original and revival series of The Outer Limits. Of these five, she was the only woman and the last survivor.