David Hartley may refer to:

• David Hartley (philosopher) (1705–1757), English philosopher
• David Hartley (the Younger) (1732–1813), son of the philosopher and signatory to the Treaty of Paris
• David Hartley (computer scientist) (born 1937), British computer scientist
• David Hartley (cricketer) (born 1963), English cricketer
• David Hartley (rugby league), rugby league footballer in the 1960s and 1970s
• David Hartley (figure skater), British figure skater
• David Hartley (musician), songwriter and arranger who collaborated with Sting
• David Hartley (politician), former member of the Ohio House of Representatives
• David Hartley (died 1770), leader of English counterfeiting gang Cragg Vale Coiners