John Fryer may refer to: John Fryer (physician) (died 1563), English physician, humanist and early reformer John Fryer (physician, died 1672), English physician John Fryer (travel writer) (1650–1733), British travel-writer and doctor Sir John Fryer, 1st Baronet (1671–1726), Lord Mayor of London John Fryer (Royal Navy officer) (1753–1817), sailing master on the Bounty Sir John Fryer (British Army officer) (1838–1917), British Army general John Fryer (sinologist) (1839–1928), educator, translator, scientist Sir John Fryer (entomologist) (1886–1948), English entomologist John Denis Fryer (1895–1923), Australian soldier and university student John E. Fryer (1938–2003), psychiatrist and gay rights activist John Fryer (producer) (born 1958), rock producer