Koppen is a surname. Notable people with the surname include:

• Dan Koppen (born 1979), American football offensive lineman

• (1929–1990), German literary scholar

• (1855–1922), German author

• Otto C. Koppen (1901–1991), American aircraft engineer

See also

• Koeppen, surname

• Köppen, surname

• Lene Køppen (born 1953), Danish badminton player