Helen DeWitt (born in Takoma Park, Maryland, a suburb of Washington, D.C.) is a novelist.

DeWitt grew up primarily in South America, as her parents worked in the United States diplomatic service. After a year at Northfield Mount Hermon School and two short periods at Smith College, DeWitt studied classics at the University of Oxford, first at Lady Margaret Hall, and then at Brasenose College for her D.Phil.