William Andrew Swanberg (November 23, 1907 in St. Paul, Minnesota – September 17, 1992 in Southbury, Connecticut) was an American biographer. He is known for Citizen Hearst, a biography of William Randolph Hearst, which was recommended by the Pulitzer Prize board in 1962 but overturned by the trustees. He won the 1973 Pulitzer Prize for Biography or Autobiography for his 1972 biography of Henry Luce, and the National Book Award in 1977 for his 1976 biography of Norman Thomas.