Catherine Shirriff (born 1941) is a Canadian actress.

Shirriff was born in Toronto, Ontario, Canada. Her notable roles include the horror comedy Vampira (1974), Bob Fosse's film All That Jazz (1979), as the Klingon Valkris in Star Trek III: The Search for Spock (1984), Olga Denerenko in Murder in Space (1985), and co-host with Jack Palance of the first season of the ABC television documentary series Ripley's Believe It or Not!. Appears on Wonder Woman episode titled, "Gault's Brain" as Tara. She also starred in season 5 -episode 18 of hit television sitcom Taxi in 1983.