Danby is a surname. Notable people with the surname include:
Abstrupus Danby (1655–1727), English wool merchant Christopher Danby (1503–1571), English politician and landowner Francis Danby (1793–1861), Irish painter Gordon Danby, American physicist Graeme Danby (born 1962), English operatic bass Herbert Danby (1889–1953), English priest and writer James Francis Danby (1816–1875), English landscape painter John Danby (disambiguation), multiple people Ken Danby (1940–2007), Canadian artist Michael Danby (born 1955), Australian politician Nicholas Danby (1935–1997) English organist, composer and teacher Noah Danby (born 1974), Canadian actor Robert Danby (died 1474), British justice Thomas Danby (disambiguation), multiple people Tom Danby (1926–2022), English rugby player William Danby (writer) (1752–1833), English writer William Danby (coroner)