John Davy
John Davy may refer to:
- John Davy (chemist), British chemist and younger brother of Sir Humphy Davy
- John Davy (cricketer), Irish cricketer
- John Davy (composer), English composer
- John M. Davy, U.S. Representative from New York
- John Davy (Blessed), English Carthusian monk executed during the English Reformation
- John Davey (Cornish speaker) of Zennor, Cornwall; considered to be one of the last people to have traditional knowledge of the Cornish language
- John Davy (MP), MP for Dorchester
- John Davy (journalist), British journalist and science editor