John Courtenay may refer to:
John Courtenay of Tremere ( – 1560), MP for Lostwithiel, Bodmin and Penryn in the United Kingdom John Courtenay, 15th Earl of Devon ( – 1471) John Courtenay (1738–1816), Member of Parliament for Tamworth and Appleby in the United Kingdom John Courtenay Trewin (1908–1990), English journalist and writer
See also John Courtney (disambiguation) Jon Courtenay Grimwood, British science fiction writer