Geoffrey Nunberg (BA, Columbia; MA, Penn; PhD, CUNY) is an adjunct full professor at the School of Information at the University of California at Berkeley. Until 2001, he was a principal scientist at the Xerox Palo Alto Research Center, working on the development of linguistic technologies. He has also taught at UCLA, the University of Rome, and the University of Naples.

Nunberg has written scholarly books and articles on a range of topics, including semantics and pragmatics, information access, written language structure, multilingualism and language policy, and the cultural implications of digital technologies.

Nunberg is the emeritus chair of the usage panel of the American Heritage Dictionary and has written on language and other topics  for The Atlantic,  The American Prospect, Forbes ASAP, American Lawyer, and Fortune, and for the Los Angeles Times, the Washington Post, the San Jose Mercury News, the San Francisco Chronicle, Newsday and the Week in Review section of the Sunday New York Times. He also does a regular language commentary on the NPR program "Fresh Air" and has contributed "letters from America" to the BBC4. He has been the subject of features and interviews in Fortune, the Harvard Business Review, the San Francisco Chronicle, the Boston Globe, and Stanford Magazine. He is a contributor to the blog LanguageLog.

Nunberg's books about language include The Way We Talk Now (2001),  and the 2004 collection Going Nucular (PublicAffairs), which was named one of the ten best nonfiction books of 2004 by Amazon.com and one of the ten best books of the year by the San Jose Mercury News, and was listed among the year's best language books by the Boston Globe, the Hartford Courant, and the Chicago Tribune. His 2006 book Talking Right: How Conservatives Turned Liberalism into a Tax-Raising, Latte-Drinking, Sushi-Eating, Volvo-Driving, New York Times-Reading, Body-Piercing, Hollywood-Loving, Left-Wing Freak Show (PublicAffairs, 2006) was named one of the ten best books of the year by the Washington Monthly. His most recent book is The Years of Talking Dangerously (PublicAffairs 2009). For his general writing about language, Nunberg was awarded the Linguistic Society of America's Language and the Public Interest Award in 2001.