Theophilus Johnson (23 August 1836 – 1919) was an English amateur naturalist, artist and publisher. Theophilus or Theo Johnson was born on 23 August 1836 at Tottenham in Middlesex, the third son of George Johnson, a well-to-do wax refiner from the City and his wife, Ann, daughter of John Josse of Spitalfields. He was the grand-uncle of Laurence Bertrand Johnson, the good friend of C. S. Lewis. Theo was apprenticed as a stationer and printer, eventually starting his own letterpress printing business.