Judy Nunn (born April 13, 1945) is an Australian former theatre and television actress and currently author, of both adult and children's fiction titles.

Nunn worked for many years as a leading stage actress, starting in 1964, and best known for her role as Alisa Stewart in the Australian soap opera Home and Away, from 1988 to 2000. Nunn was awarded a Member of the Order of Australia in the 2015 Australia Day Honours for her service to the performing arts as a scriptwriter and actor of stage and screen, and to literature as an author.