John Milton Cooper, Jr. (born 1940) is an American historian, author, and educator. His specialization is late 19th- and early 20th-century American Diplomatic History. Cooper is Professor Emeritus at the University of Wisconsin-Madison.
His most recent book, Woodrow Wilson: A Biography, was published in 2009. It is described as "the first major biography of America’s twenty-eighth president in nearly two decades." The book was a finalist for the Pulitzer Prize for Biography or Autobiography.
- Princeton University, summa cum laude, 1961
- Columbia University, PhD, 1968
- The Vanity of Power; American Isolationism and the First World War. 1914-1917. Westport, Conn., Greenwood Publishing Corp., 1969
- Editor, Causes and Consequences of World War I. Chicago: Quadrangle Books, 1972
- Walter Hines Page: The Southerner as American,1855-1918. Chapel Hill: University of North Carolina Press, 1977
- The Warrior and the Priest: Woodrow Wilson and Theodore Roosevelt. Cambridge, Mass.,: Harvard University Press, 1983 ISBN 9780674947511
- Pivotal Decades: The United States 1900-1920. New York W.W. Norton & Co., 1990
- Editor with Charles E. Neu, The Wilson Era: Essays in Honor of Arthur S. Link. Arlington Heights, ILL., Harlan Davidson, Inc., 1991
- Breaking the Heart of the World: Woodrow Wilson and the Fight for the League of Nations. New York: Cambridge University Press, 2001
- Woodrow Wilson: A Biography. New York: Vintage: 2009 ISBN 9780307265418