John Fryer
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), British travel-writer and doctor
- Sir John Fryer, 1st Baronet, Lord Mayor of London
- John Fryer (Royal Navy officer), sailing master on HMS Bounty
- Sir John Fryer (British Army officer), British Army general
- John Fryer (sinologist), educator, translator, scientist
- Sir John Fryer (entomologist), English entomologist
- John Denis Fryer, Australian soldier and university student
- John E. Fryer, psychiatrist and gay rights activist
- John Fryer (producer), rock producer