David John Scheffer (born September 18, 1953) is an American lawyer and diplomat who served as the first United States Ambassador-at-Large for War Crimes Issues, during President Bill Clinton's second term in office. He is the Mayer Brown/Robert A. Helman Professor of Law at Northwestern University School of Law, where he directed the Center for International Human Rights from 2006 to 2019. He was awarded a 2013 Berlin Prize Fellowship at the American Academy in Berlin.