William Hollingsworth Attwood (July 14, 1919 – April 15, 1989) was an American journalist, writer, editor and diplomat.

After the war's end, Attwood wrote for the New York Herald Tribune and soon was transferred to the Paris bureau of the international edition.

His first book, The Man Who Could Grow Hair, or Inside Andorra, was a memoir-based series of tales of his adventures in post-war Europe.

Adlai Stevenson recruited Attwood to serve as a speechwriter and advisor for his 1952 and 1956 presidential campaigns, and to write other speeches in 1960.

In 1963, as the Kennedy administration sought to negotiate détente with Fidel Castro in Cuba, Attwood served as a secret liaison.

Upon retirement in 1979, Attwood focused on writing, and serving the Town Council in his hometown of New Canaan, Connecticut.