John Darby may refer to:

John Darby (NASCAR official), NASCAR Sprint Cup Series director John Fletcher Darby (1803–1882), American politician John M. Darby, botanist (1804–1877), American academic and chemist John Nelson Darby (1800–1882), 19th-century Anglo-Irish evangelist and religious writer John Darby (Dean of Chester) (1831–1919), Anglican priest John Darby (printer) (died 1704), English printer

Fictional Darby and Joan, a character in this poem

See also John Derby (disambiguation)