John Darby

• John Darby (NASCAR official), NASCAR Sprint Cup Series director
• John Fletcher Darby, American politician
• John M. Darby, botanist, American academic and chemist
• John Nelson Darby, 19th-century Anglo-Irish evangelist and religious writer
• John Darby (Dean of Chester), Anglican priest
• John Darby (printer), English printer

Fictional

• Darby and Joan, a character in this poem