Gaul is a surname. Notable people with the surname include:
Alfred R. Gaul (1837–1913), English composer and conductor Arrah Lee Gaul (1888-1980), American painter August Gaul (1869–1922), German sculptor Charly Gaul (1932–2005), Luxembourgish cyclist David Gaul (1886–1962), American swimmer and 1904 Olympian Frank Gaul (born 1924), American politician Gilbert Gaul (artist) (1855–1919), American war artist Gilbert M. Gaul (born 1951), American journalist Harvey Bartlett Gaul (1881–1945), American composer Horace Gaul (1883–1939), ice hockey player Karl Gaul (1889–1972), German politician Michael Gaul (born 1973), former professional ice hockey defenceman William Gaul (1850–1927), Bishop of Mashonaland