Koppen

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