Haas, also de Haas, is a German and Dutch surname, usually from Hase or de Haas, the German and Dutch words for "hare". Notable people with the surname include the following:
Andreas Haas (born 1982), German footballer
Arthur Erich Haas (1884–1941), Austrian physicist
Barbara Haas (born 1996), Austrian tennis player
Bernt Haas (born 1978), Austrian footballer
Bill Haas (born 1982), American golfer
Bob Haas (born 1942), former chairman of Levi Strauss & Co.
Brittany Haas, American Fiddler
Carl Haas (1930–2016), American auto racing impresario
Charles F. Haas (1913–2011), American film and television director
Charles S. Haas (born 1952), American screenwriter and actor
Charlie Haas (born 1972), American professional wrestler
Christian Haas (born 1958), German sprinter
Chrislo Haas (1956–2004), German musician
Christl Haas (1943–2001), Austrian Olympic skiing champion
Clark Haas (1919–1978), American cartoonist
Conrad Haas (1509–1576), Austrian military engineer
Daniel Haas (born 1983), German footballer
Darius de Haas (born 1968), American stage actor and singer
David Haas (born 1957), American author and composer of liturgical music
Dolly Haas (1910–1994), German-American actress
Earle Haas (1888–1981), inventor of the modern menstrual tampon
Eddie Haas (born 1935), American baseball outfielder and manager
Eduard Haas (1897–1989), Austrian inventor of Pez candy
Ernst Haas (1921–1986), Austrian photographer and photojournalist
Ernst B. Haas (1924–2003), American political scientist
Felix Haas, German investor
Frank Joseph Haas, former Grand Master of the Grand Lodge of West Virginia
Fred Haas (1916–2004), American golfer
Fritz Haas (zoologist) (1886–1969)
Geertruida de Haas-Lorentz (1885–1973), Dutch physicist
Gene Haas (born 1952), American machine tool manufacturer
Georg Haas (physician) (1886–1971), German medical doctor
Georg Friedrich Haas (born 1953), Austrian composer
Hans Haas (1886–1935), German Protestant theologian
Harald Haas, Professor of Mobile Communications, University of Edingburgh
Harald Haas (born 1990), Austrian software developer and politician
Helmut Haas (fl. 1949), discoverer of the Haas effect, a psychoacoustic effect
Hugo Haas (1901–1968), Czech film actor and director
Jacob de Haas (1872–1937), UK journalist and an early leader of the Zionist movement
Jay Haas (born 1953), American professional golfer
Josef Haas (born 1937), Swiss cross country skier
Joseph Haas (1879–1960), German composer
Karen L. Haas, American government administrator and lobbyist
Karl Haas (1913–2005), American classical music radio show host
Leonard Haas, Wisconsin politician and President of UW-Eau Claire
Lisbeth Haas, American historian and anthropologist
Lukas Haas (born 1976), American film actor
Mario Haas (born 1974), Austrian footballer
Mary Haas (1910–1996), American linguist
Mauritz de Haas (1832–1895), Dutch-American marine painter
Maximilian Haas (born 1985), German footballer
Monique Haas (1909–1987), French pianist
Moose Haas (born 1956), American baseball player
Mule Haas (1903–1974), American baseball player
Nico de Haas (1907–ca. 2000), Dutch National-Socialist editor, photographer, and artist
Pavel Haas (1899–1944), Czech Jewish composer
Peter W. Haas (born 1964), Slovak fine art photographer
Richard Haas (born 1936), American muralist
Robert Haas (clergyman), 19th-century German Lutheran minister
Robert Haas (musicologist) (1886–1960), Austrian musicologist
Russ Haas (1974–2001), American professional wrestler
Saskia Rao-de Haas, Dutch cellist of music from India
Sidney V. Haas, M.D. (1870–1964), American pediatrician and originator of the Specific Carbohydrate Diet
Thomas J. Haas, American university president
Tiffany Haas (born c. 1983), American softball player
Tom Haas (b. 1952), American artist--oil painter
Tommy Haas (born 1978), German tennis player
Toxey Haas (born 1960), American businessman
Wander Johannes de Haas (1878–1960), Dutch physicist and mathematician
Walter A. Haas (1889–1979), American president and chairman of Levi Strauss & Co.
Walter A. Haas, Jr. (1916–1995), American president and chairman of Levi Strauss & Co.
Walter H. Haas, (1917-2015), American amateur astronomer, founder of the Association of Lunar and Planetary Observers (ALPO)
Waltraut Haas (born 1927), Austrian actress and singer
Werner Haas (1927-1956), German motorcycle racer
Wolf Haas (born 1960), Austrian author
Wolfgang Haas (born 1948), archbishop in Liechtenstein
