John Buchan, 1st Baron Tweedsmuir was a Scottish novelist, historian, and Unionist politician who served as Governor General of Canada, the 15th since Canadian Confederation.

John Bunyan (; was an English writer and Puritan preacher. He was baptised 30th November 1628 and lived until 31st August 1688. He is best remembered as the author of the Christian allegory The Pilgrim's Progress, which also became an influential literary model. In addition to The Pilgrim's Progress, Bunyan wrote nearly sixty titles, many of them expanded sermons.

John William Burgon was an English Anglican divine who became the Dean of Chichester Cathedral in 1876. He was known during his lifetime for his poetry and his defense of the historicity and Mosaic authorship of Genesis. Long after his death he was remembered chiefly for his defense of the traditional text of the New Testament.

John Burroughs was an American naturalist and nature essayist, active in the conservation movement in the United States. The first of his essay collections was Wake-Robin in 1871.

John Calvin was a French theologian, pastor and reformer in Geneva during the Protestant Reformation. He was a principal figure in the development of the system of Christian theology later called Calvinism, including its doctrines of predestination and of God's absolute sovereignty in the salvation of the human soul from death and eternal damnation. Calvinist doctrines were influenced by and elaborated upon the Augustinian and other Christian traditions. Various Congregational, Reformed and Presbyterian churches, which look to Calvin as the chief expositor of their beliefs, have spread throughout the world.

John Carl Parish was an American historian of American history.

Sam Youd, was a British writer, best known for science fiction written under the name of John Christopher, including the novels The Death of Grass, The Possessors, and the young-adult novel series The Tripods. He won the Guardian Children's Fiction Prize in 1971 and the Deutscher Jugendliteraturpreis in 1976.

John Clare was an English poet. The son of a farm labourer, he became known for his celebrations of the English countryside and sorrows at its disruption. His work underwent major re-evaluation in the late 20th century; he is now often seen as a major 19th-century poet. His biographer Jonathan Bate called Clare "the greatest labouring-class poet that England has ever produced. No one has ever written more powerfully of nature, of a rural childhood, and of the alienated and unstable self."

John Clark Ridpath was an American educator, historian, and editor. His mother was a descendant of Samuel Matthews, a colonial governor of Virginia. Among his most notable works is a series of volumes on a history of the world, titled Cyclopedia of Universal History.

John Cleland was an English novelist best known for his fictional Fanny Hill: or, the Memoirs of a Woman of Pleasure, whose eroticism led to his arrest. James Boswell called him "a sly, old malcontent".