Guth is a surname. Notable people with the surname include:
Charlie Guth (1856–1883), American baseball player
Louis D. Guth (1857-1939), American businessman and politician
Charles Guth (1876–1948), American businessman
Jean-Baptiste Guth (1883–1921), French painter and illustrator
Eugene Guth (1905–1990), Hungarian-American physicist
Alfred Guth (1908–1996), Austrian pentathlete
Paul Guth (1910–1997), French humorist and writer
Forrest Guth (1921–2009), American soldier, Purple Heart recipient
Alan Guth (born 1947), American cosmologist
Bucky Guth (born 1966), American baseball player
John Guth (born 1981), American poker player
Amy Guth, Chicago radio host and writer
Larry Guth, mathematician
Joseph P. Guth, American architect
