Sir David Christopher Graham Skegg KNZM OBE FRSNZ (born 16 December 1947) is a New Zealand epidemiologist and university administrator. He is an emeritus professor in the Department of Preventive and Social Medicine at the University of Otago. He was the vice-chancellor of the university from 2004 to 2011 and president of the Royal Society of New Zealand from 2012 to 2015. His primary research interest is cancer epidemiology.