Hassler (also Haßler, Häßler, Hässler, Hasler, ...) is a toponymic surname derived from a number of places called Hasel or Hassel in German-speaking parts of Europe.

Notable people with this name include:

Musicians

A musical dynasty in Nuremberg

Isaak Hassler (c.1530 – 1591), organist and father of three brothers:

• Kasper Hassler (1562–1618), minor composer and publisher

• Hans Leo Hassler (1564–1612), an important German composer and organist

• Jakob Hassler (1569–1622), composer most noted for his keyboard works

• Johann Wilhelm Hässler (1747–1822), German organist and composer

Athletes

• Nicole Hassler (1941–1996), French figure skater

• Des Hasler (born 1961), Australian rugby league footballer and coach

• Thomas Häßler (born 1966), former German football player and 1990 World Cup winner

• Dominic Hassler (born 1981), Austrian football player

• Melanie Hasler (born 1998), Swiss bobsledder

Other professions

• Johann Hasler (1548, died after 1602), Swiss theologian and physician

• Ferdinand Rudolph Hassler (1770–1845), first US Coast Survey superintendent

• Emil Hassler (1864–1937) (French:Émile Hassler, Spanish: Emilio Hassler), Swiss physician, ethnographer, naturalist, and botanist

• Friday Hassler (1935–1972), American NASCAR driver

• Alois Hassler (1906–1993), Liechtenstein politician

• Hassler Whitney (1907–1989), American mathematician

• Herbert "Blondie" Hasler (1914–1987), British Marines officer and later a noted single-handed sailor

• Hermann Hassler (1941–2013), Liechtenstein politician and cabaret performer

• Rolf Hassler (1914–1984), German neurobiologist

• Eveline Hasler (born 1933), Swiss writer

• Beat Hasler (1938–2017), Liechtenstein journalist and politician

• Jon Hassler (1933–2008) American novelist for whom is named the Jon Hassler Theater in Plainview, Minnesota

• Marie Hasler (born 1948), New Zealand politician

• Harry Hasler, fictional alter ego of Viktor Giacobbo, one of his most popular satirical figures

• Otmar Hasler (born 1953), Prime Minister of Liechtenstein

• Uwe Hassler (born 1963), German professor of statistics and econometrics

• Adrian Hasler (born 1964), Prime Minister of Liechtenstein

• John Hasler (born 1974), English actor

• Dietmar Hasler (born 1975), Liechtenstein politician

• Johannes Hasler (born 1982), Liechtenstein politician

• Irací Hassler (born 1990), Chilean politician and economist

See also

• Johann Georg Hasler (disambiguation)