John Linnell (16 June 1792 – 20 January 1882) was an English engraver, and portrait and landscape painter. He was a naturalist and a rival to the artist John Constable. He had a taste for Northern European art of the Renaissance, particularly Albrecht Dürer. He also associated with the amateur artist Edward Thomas Daniell, and with William Blake, to whom he introduced the painter and writer Samuel Palmer and others of the Ancients.