Guth is a surname. Notable people with the surname include:
Alan Guth (born 1947), American cosmologist Alfred Guth (1908–1996), Austrian-born American water polo player, swimmer, and Olympic modern pentathlete Allison Guth (born 1981/2), American basketball coach Amy Guth, American radio host and writer Bucky Guth (born 1966), American baseball player Charles Guth (1876–1948), American businessman Charlie Guth (1856–1883), American baseball player Claus Guth (born 1964) German theatre director, focused on opera Dana Guth (born 1970), German politician Dennis Guth (born 1955), American politician Eugene Guth (1905–1990), Hungarian-American physicist Fernand Guth (1926–1977), Luxembourgish footballer Henk Guth (c.1921–2003), Dutch artist Jean Baptiste Guth (1883–1921), French painter and illustrator John Guth (born 1981), American poker player Joseph P. Guth (1860–1928), American architect Larry Guth (born 1977), mathematician Louis D. Guth (1857–1939), American businessman and politician Mara Guth (born 2003), German tennis player MK Guth (born 1963), American installation artist Paul Guth (1910–1997), French humorist and writer Raymond Guth (1924–2017), American film and television actor Rodrigo Guth (born 2000), Brazilian footballer William Westley Guth (1871–1929), American attorney, Methodist minister, and academic