Kupper or Kuppers (also Küpper and Küppers) is a surname of Germanic origin meaning maker or repairer of wooden vessels. It is related to the English surname Cooper.^[1]

• Alex Kupper (born 1990), American football player
• András Kupper (born 1964), Hungarian physician and politician
• Annelies Kupper (1906-1987), German operatic soprano
• Anneliese Küppers (1929–2010), German equestrian and Olympic medalist
• Daniel Kupper (1952), American psychologist
• Eduardo Ferreyros Kuppers, Peruvian politician and Minister of Foreign Commerce and Tourism
• Eileen Küpper, South African singer
• Eric Kupper, American remixer
• Ernst-Joachim Küppers (1942–2025), German swimmer
• Hans Küppers (1938–2021), German footballer
• Herbert Kupper (1914-1994), American Psychoanalyst
• Jochen Küpper (born 1971), German physicist and chemist
• Josef Kupper (1932-2017), Swiss chess master
• Ketti Kupper (born 1951), American artist and designer
• Kurt Küppers (1894–1971), German World War I fighter pilot
• Martin Kupper (born 1989), Estonian discus thrower
• Petra Kuppers (born 1968), German-American artist and disability culture activist
• Paul Kupper (died 1908), American sculptor and creator of Eight Stone Lions
• Stephan Küppers, West German slalom canoer
• Thomas Kupper, (1953), American physician and medical researcher

• Nowa Kopernia, a village in Poland whose German name is Küpper