John Roderigo Dos Passos (; January 14, 1896 – September 28, 1970) was a radical American novelist and artist active in the first half of the twentieth century. He was born in Chicago, Illinois, and he went on to Harvard College, graduating in 1916. He was well-traveled, visiting Europe and the Middle East, where he learned about literature, art, and architecture. During World War I he was a member of the American Volunteer Motor Ambulance Corps in Paris and Italy, later joining the U.S. ArmyMedical Corps.
By the 1950s his political views had changed dramatically, and in the 1960s, he actively campaigned for presidential candidates Barry Goldwater and Richard M. Nixon.
An artist as well as a novelist, Dos Passos created cover art for his books, was influenced by the modernist movements in 1920s Paris, and continued to paint throughout his lifetime. He died on Monday, September 28, 1970.