Warren Sack is a software designer and media theorist whose work explores theories and designs for online public space and public discussion.

He is Professor of Film and Digital Media; affiliated faculty with the Computer Science Department; affiliated faculty with the History of Art and Visual Culture Department's Ph.D. program; affiliated faculty with the Community Studies Department; and, a member of the graduate faculty for the Digital Arts and New Media Program (housed jointly by the Arts Division and the School of Engineering) at the University of California, Santa Cruz. He is also an external faculty affiliate at the Center on Organizational Innovation of the Institute for Social and Economic Research and Policy at Columbia University. Before joining the faculty at the University of California, Santa Cruz, Warren was an assistant professor at UC Berkeley's School of Information. He earned a B.A. from Yale College and an S.M. and Ph.D. from the MIT Media Laboratory.

Warren's writings have been published or presented in the venues of anthropology, architecture, art, art criticism, art history, computer science, design, education, film, feminist studies, geography, linguistics, literature, media studies, philosophy, science studies, sociology, and political science. His research has been funded by the National Science Foundation, the Sunlight Foundation,, the Walker Art Center and the Jerome Foundation. His art work has been shown at the ZKM|Center for Art and Media, Karlsruhe, Germany; the New Museum of Contemporary Art, New York; the Walker Art Center, Minneapolis; the artport of the Whitney Museum of American Art; and, the San Francisco Museum of Modern Art.