Lawrence "Larry" Lessig (born June 3, 1961) is an American academic and political activist. He is best known as a proponent of reduced legal restrictions on copyright, trademark, and radio frequency spectrum, particularly in technology applications, and he has called for state-based activism to promote substantive reform of government with a Second Constitutional Convention.

He is a director of the Edmond J. Safra Foundation Center for Ethics at Harvard University and a professor of law at Harvard Law School. Prior to rejoining Harvard, he was a professor of law at Stanford Law School and founder of its Center for Internet and Society. Lessig is a founding board member of Creative Commons, and also is on the board of MapLight. He is on the advisory boards of the Sunlight Foundation and Americans Elect. He is a former board member of the Free Software Foundation, Software Freedom Law Center and the Electronic Frontier Foundation.