Jim Buckmaster is a programmer who has been the chief executive officer of Craigslist since 2000. He was an undergraduate at Virginia Tech and studied medicine and classics at the University of Michigan in the 1990s.

Before joining craigslist, Buckmaster directed web development for Creditland (defunct) and Quantum. In 1994-95, he built what may have been the world's largest web site at the time, a terabyte-scale database-driven public web site for ICPSR at at the University of Michigan. In January 2000, he was recruited by Craigslist as lead programmer, where he contributed the site's multi-city architecture, search engine, discussion forums, flagging system, self-posting process, homepage design, personals categories, and best-of-craigslist. In November of 2000, he was promoted to the post of CEO.

He has been the subject of feature stories in The New York Times, Wall Street Journal, Fortune, BusinessWeek, Telegraph, SF Chronicle, and many other publications; been interviewed for dozens of television and radio programs; and is possibly the only American CEO ever accused in major business periodicals of being anti-establishment, a communist, a socialist, and an anarchist.