Clasen

Clasen is a German surname. Notable people with the surname include:


 * Alvin J. Clasen (1892-1971), American politician
 * Daniel Clasen (1622–1678), German political theorist, religious scholar, and classicist
 * Helmut Clasen (born 1935), German-born Canadian motorcycle racer
 * Henry J. Clasen (1829-1907), American politician
 * Leo Clasen (1906–1972), German Holocaust survivor