'''Gadd''' is a surname. Notable people with the surname include:
* Anthony Gadd (1917–1996), British bobsledder * C. J. Gadd (1893–1969), British Assyriologist and curator * Christianne Gadd (born 1971), former name of Brazilian actress Christianne Oliveira * Eric Gadd * Geoffrey Michael Gadd (born 1954), British-Irish microbiologist and mycologist * Hemming Gadd (1837–1915), Swedish Army general * Hugo Gadd (1885–1968), Swedish Army major general * Knut Gadd (1916–1995), Swedish water polo player * Paul Francis Gadd (born 1944), the real name of British pop singer and convicted paedophile Gary Glitter * Renee Gadd (1908–2003), Argentine-born British film actress * Richard Gadd (born 1989), Scottish writer, actor and comedian * Rochelle Gadd, British actress * Stephen Gadd (born 1964), English operatic baritone * Steve Gadd (born 1945), American drummer * Steve Gadd (born 1951), English vocalist of rock band Stray * Trevor Gadd (born 1952), English athlete * Will Gadd (born 1967), Canadian ice climber and paraglider pilot
'''Fictional characters:''' * Elvin Gadd, fictional character
{{surname|Gadd}}