Dorit Margreiter Choy (1967, Vienna, Austria) is a photographer, video and installation artist. She studied at the University of Applied Arts in Vienna from 1988 to 1992.

In 1997-1998 she took part in the International Studio Program at the Künstlerhaus Bethanien in Berlin. In 2001 she was an artist-in-residence at the MAK Center of Art and Architecture, Los Angeles. In 2002, she received the Otto Mauer Prize in Vienna and in 2016, the Austrian Art Prize for Film and Media art. On the occasion of the 53. Venice Biennale in 2009, she converted the side wing of the Austrian Pavilion into a cinema and simultaneously used it as a filming location for a silent film shown there (Pavilion, 2009 35mm, b/w, silent, 8min). She writes: "I wanted to explore this space, which appears to be a historic garden house but is completely unsuitable as a contemporary exhibition space, as a cinematic and sculptural space. I was particularly interested in the architecture of the pavilion with its spectacular light shows."

Margreiter Choy is professor of video and video installation at the Academy of Fine Arts in Vienna. She lives and works in Vienna. Her work is in the EVN Collection, Austria, among others; the Taxispalais Kunsthalle Tirol; Generali Foundation; Museo Nacional Centro de Arte Reina Sofía, Madrid; Museum der Moderne Stiftung Ludwig (mumok), Vienna and the MoMA, New York.