Millner is a surname. Notable people with the surname include:
David Millner (born 1938), English cricketer
Denene Millner, American author and journalist
F. Ann Millner, American educator
Guy Millner, American businessman
James Millner (pharmacist) AM (1919–2007), pharmacist and Australian corporate executive
James Millner (doctor) (1830–1875), early Australian doctor and pioneer
John J. Millner, American politician
Joshua Millner (1849–1931), British sport shooter
Robert Millner, Australian corporate executive
Tivadar Millner (1899–1988), Hungarian inventor
Thomas Millner (1887–1985), Australian Colonel during WWII
Wayne Millner (1913–1976), American football player