John Firth

John Firth may refer to:


 * John Firth (cricketer) (1900–1957), schoolboy cricketer and Church of England clergyman
 * John Firth (folklorist) (1838–1922), Scottish folklorist
 * John Rupert Firth (1890–1960), commonly known as J. R. Firth, English linguist
 * John Firth (baseball) (1855–1902), baseball player
 * John C. B. Firth (1894–1931), World War I flying ace