Marj Dusay was an American actress.

Best known for her roles on soap operas, Dusay was a staple in five daytime television series: Capitol, Santa Barbara, Days of Our Lives, All My Children, and Guiding Light.

She got her start with a supporting role opposite Elvis Presley in the film Clambake (1967) and would go on to make a number of guest appearances in television shows such as Star Trek: The Original Series, The Wild Wild West, Bonanza, Hogan's Heroes, The Odd Couple, Barnaby Jones, and had a recurring role in The Facts of Life.

She was twice nominated for Daytime Emmys: first in 1995 for Outstanding Lead Actress in a Drama Series in Guiding Light and again in 2002 for a Special Fan Award as America's Favorite Villain in All My Children.

Dusay died January 28, 2020, in Manhattan, New York. She was 83.