John Piper may refer to:John Piper (artist) (1903–1992), English painter, printmaker and designer of stained-glass windows
John Piper (broadcaster), BBC radio host
John Piper (1773–1851), lieutenant-governor of Norfolk Island
John Piper (theologian), Calvinist Baptist pastor and author
John Piper, a recurring fictional character in crime novels by Harry Carmichael, a pen name of British writer Leo Ognall