Harley Jane Kozak (born January 28, 1957) is an American author and retired actress. She made her film debut in the slasher film The House on Sorority Row (1982), and had a recurring role as Mary Duvall on the soap opera Santa Barbara between 1985 and 1989.

Kozak continue to act in film throughout the remainder of the 1990s and in the 2000s, but turned her focus to writing novels.