Gus Green Van Sant Jr. (born July 24, 1952) is an American filmmaker, photographer, painter, and musician who has earned acclaim as an independent filmmaker. His films typically deal with themes of marginalized subcultures.

His early career was devoted to directing television commercials in the Pacific Northwest. He made his feature-length directorial debut film Mala Noche (1985). His second film, Drugstore Cowboy (1989), was highly acclaimed, and earned him screenwriting awards from the Los Angeles Film Critics Association and New York Film Critics Circle and the award for Best Director from the National Society of Film Critics. His next film, My Own Private Idaho (1991), was similarly praised, as were the black comedy To Die For (1995), the drama Good Will Hunting (1997), and the biographical film Milk (2008); for the latter two, Van Sant was nominated for the Academy Award for Best Director and both films received Best Picture nominations.

In 2003, Van Sant's film based on the Columbine High School massacre, Elephant, won the Palme d'Or at the Cannes Film Festival. Van Sant also received the festival's Best Director Award that same year, making him one of only two filmmakers—the other being Joel Coen—to win both accolades at the festival in the same year. Though most of Van Sant's other films received favorable reviews, such as Finding Forrester (2000) and Paranoid Park (2007), some of his efforts, such as the art house production Last Days (2005) and the environmental drama Promised Land (2012), have received more mixed reviews from critics, while his adaptation of Tom Robbins's Even Cowgirls Get the Blues (1993), his 1998 remake of Alfred Hitchcock's Psycho, and The Sea of Trees (2015), were critical and commercial failures.

Van Sant wrote the screenplays for several of his earlier works, and is the author of a novel, Pink. A book of his photography, 108 Portraits, has been published, and he has released two musical albums.

He lives in the Los Feliz section of Los Angeles, California.