Klopfenstein

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


 * Amélie Klopfenstein (born 2002), Swiss alpine skier
 * Joe Klopfenstein (born 1983), American football player
 * Scott Klopfenstein (born 1977), American singer and multi-instrument musician
 * Willy Klopfenstein (1921–2002), Swiss ski jumper