Hassler
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