John Loftus may refer to:
John Loftus (military author) (born 1950), military author and radio talk show host John Loftus, 2nd Marquess of Ely (1770–1845), peer and Member of Parliament in Ireland and the United Kingdom John W. Loftus (born 1954), atheist author and former minister Johnny Loftus (1895–1976), American jockey Johnny Loftus (1874–1935), American boxing trainer