Margaret Ann "Peggy" Hamburg (born July 12, 1955, Chicago, Illinois) is an American physician and public health administrator, who is serving as the chair of the board of the American Association for the Advancement of Science (AAAS) and co-chair of the InterAcademy Partnership (IAP). She served as the 21st Commissioner of the U.S. Food and Drug Administration from May 2009 to April 2015.