Klien

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


 * Christian Klien (born 1983), Austrian racing driver
 * Erika Giovanna Klien (1900–1957), artist and art educator
 * Hermann Klien (born 1932), Austrian gymnast
 * Michael Klien (born 1973), choreographer and artist
 * Paula Klien, Brazilian artist
 * Walter Klien (1928–1991), Austrian pianist