John Davy

John Davy may refer to:


 * John Davy (chemist) (1790–1868), British chemist and younger brother of Sir Humphy Davy
 * John Davy (cricketer) (born 1974), Irish cricketer
 * John Davy (composer) (1763–1824), English composer
 * John M. Davy (1835–1909), U.S. Representative from New York
 * John Davy (Blessed), English Carthusian monk executed during the English Reformation
 * John Davey (Cornish speaker) of Zennor (1812–1891), 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) (1927–1984), British journalist and science editor