Koppen is a surname. Notable people with the surname include:
- Dan Koppen (born 1979), American football offensive lineman
- Erwin Koppen (1929–1990), German literary scholar
- Luise Koppen (1855–1922), German author
- Wladimir Köppen (1846–1940), climatologist
- Köppen climate classification, developed by Wladimir Köppen
- Otto C. Koppen (1901–1991), American aircraft engineer
See also
- Koeppen, surname
- Köppen, surname
- Lene Køppen (born 1953), Danish badminton player
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