David Gaub McCullough (mə-kŭl'ə) (born July 7, 1933 in Pittsburgh, Pennsylvania) is an American author, narrator, and lecturer. He is a two-time winner of the Pulitzer Prize and the National Book Award, and a recipient of the Presidential Medal of Freedom, the United States' highest civilian award.

Born and raised in Pittsburgh, McCullough attended Yale University, earning a degree in English literature. His first book, The Johnstown Flood, was published in 1968; he has since written seven more on topics such as Harry S. Truman, John Adams, and the Brooklyn Bridge. McCullough has also narrated multiple documentaries, as well as the 2003 film Seabiscuit; he also hosted American Experience for twelve years. Two of McCullough's books, Truman and John Adams, have been adapted into a TV film and mini-series, respectively, by HBO. McCullough's next work, about Americans in Paris, is due out in 2010.

Born to Christian Hax and Ruth McCullough, McCullough was educated at Linden Avenue Grade School and Shady Side Academy, in his hometown of Pittsburgh, Pennsylvania. One of four sons, McCullough had a "marvelous" childhood; he had a wide range of interests, including sports and drawing cartoons. McCullough's parents and grandmother, who read to him often, introduced him to books at an early age. His parents talked openly about history, a topic which he feels should be discussed more often. McCullough "loved school, every day"; he contemplated many career choices ranging from architect, actor, painter, writer, lawyer, and even attending medical school.