Dan Gillmor is an American technology writer and columnist. He is director of the Knight Center for Digital Media Entrepreneurship at Arizona State University's Walter Cronkite School of Journalism and Mass Communication and a fellow at the Berkman Center for Internet & Society at Harvard University.

Gillmor is also the author of a popular weblog covering technology news and the Northern California technology business sector, criticizing rigid enforcement of copyrights, and commenting on politics from a liberal perspective.