Oswald Garrison Villard (1872-1949) was an American journalist, pacifist, and liberal. Born in Wiesbaden in Germany, he attended Harvard University and upon his graduation in 1893 he began writing for the New York Evening Post and The Nation. He became editor of the latter in 1918. Both papers were owned by Villard's father, German-born journalist and railroad magnate Henry Villard; upon his father's death Villard became the owner.

Throughout his life he supported and promoted civil rights and civil liberties (his mother, Helen Frances Garrison, was the daughter of noted anti-slavery activist William Lloyd Garrison). In 1910 he supported, and donated space in the New York Evening Post to advertise, the formation of what became the National Association for the Advancement of Colored People (NAACP), and the same year he wrote and published a biography of abolitionist John Brown (John Brown 1800-1859: A Biography Fifty Years After).

Villard's pacifism led him to become an early member of the anti-war America First Committee and a founder of the American Anti-Imperialist League, which opposed American retention of territories captured during the Spanish-American War (in support of this he attempted to organize a third-party ticket in the 1900 presidential election). Villard believed so strongly in non-intervention that he sold the New York Evening Post in 1918 over its position on World War I and severed his ties with The Nation in 1935 when it too supported American intervention in Europe.