Gaul is a surname. Notable people with the surname include:
- Alfred R. Gaul (1837–1913), English composer and conductor
- August Gaul (1869–1922), German sculptor
- Charly Gaul (1932–2005), Luxembourgian 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
- Michael Gaul (born 1973), former professional ice hockey defenceman
- William Gaul (1850–1927), Bishop of Mashonaland
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