David Richmond Gergen (last name pronounced /ˈɡɜrɡən/; born May 9, 1942; also known as David Rodham Gergen) is an American political consultant and presidential advisor during the administrations of Nixon, Ford, Reagan, and Clinton. He is currently Director of the Center for Public Leadership and a professor at the Harvard Kennedy School.

Gergen was born in Durham, North Carolina. He has a brother, Kenneth J. Gergen, a psychologist and professor at Swarthmore College. Gergen earned his bachelor's degree from Yale University in 1963. In 1967, he received his law degree from Harvard University, and currently is a member of the D.C. Bar. That same year Gergen married Anne Gergen of England. She is a family therapist and they live in Cambridge, Massachusetts. They have two children, Christopher and Katherine.

Gergen served in the U.S. Navy for three-and-a-half years, serving on a ship home-ported in Japan, and is a well-known proponent of mandatory national service.