Marvin, Francis SydneyGay is a surname. Notable people with the surname include:
Adelaide Gay (born 1989), American soccer goalkeeper
Al Gay (1928–2013), British jazz tenor saxophonist
Alberta Gay (1913–1987), American domestic worker, mother of Marvin Gaye
Amandine Gay (born 1984), French-African feminist, film maker, and actress
Andrew Gay (born 1989), Australian rugby league footballer
Antoine Gay (1790–1871), Frenchman believed to have been possessed by a demon named Isacaron
Arnold Gay (born 1967), Singaporean TV and radio presenter
Aurélien Gay (born 2000), Swiss ski mountaineer
Benjamin Gay (1980–2024), American football running back
Betsy Gay (1929–2025), American actress and yodeller
Betty Gay, American politician
Bill Gay (1927–2008), professional American football player
Blenda Gay (1950–1976), defensive end in the National Football League
Bram Gay (1930–2019), trumpet player and brass band enthusiast
Brian Gay (born 1971), American golfer
Byron Gay (1886–1945), American songwriter
Carlos Gay (born 1952), Argentine football goalkeeper
Cesc Gay (born 1967), movie director
Charles R. Gay (1875–1946), American banker and president of the New York Stock Exchange
Charlotte Evelyn Gay (1867–1958), English social and temperance reformer
Chet Gay (1900–1978), American football player
Christopher Daniel Gay (born 1974), American habitual car thief
Claude Gay (1800–1873), French botanist
Claudine Gay (born 1970), American political scientist and 30th president of Harvard University
Connie B. Gay (1914–1989), American country music promoter
D. J. Gay (born 1989), retired American professional basketball player
Dale Pickett Gay (1891–1988), Wyoming clubwoman in the oil business
Danny Gay (disambiguation), various people
David Gay (disambiguation), various people
Désirée Gay (1810–1891), French socialist feminist
Duncan Gay (born 1950), an Australian politician
Earl C. Gay (1902–1972) was a registered pharmacist, member of the Los Angeles City Council
Edward Gay (disambiguation), several people
Edwin Francis Gay (1867–1946), American economist
E. Jane Gay (1830–1919), American woman who devoted her life to social reform and photography
Éric Gay (born 1958), French politician in New Caledonia
Everett Gay (born 1964), former American football wide receiver
Federico Gay (disambiguation), various people
Francisque Gay (1885–1963), French editor, politician and diplomat
Françoise Gay (born 1945), Swiss alpine skier
Frank William Gay (1920–2007), American executive who oversaw several entities for Howard Hughes
Frederick Parker Gay (1874–1939), American bacteriologist who combated typhoid fever and leprosy
Geneva Gay, American academic and author
Geoff Gay (born 1957), English former professional footballer
George Gay (disambiguation), various people
Georges Gay (1926–1997), French professional racing cyclist
Gerald Gay (born 1956), American politician
Git Gay (1921–2007), Swedish revue director, actress, and singer
Greg Gay (born 1952), American politician
Heather Gay (born 1974), American television personality
Henry M. Gay, one of three founders of Triad Systems Corporation, now known as Activant
Hobart R. Gay (1894–1983), American general
Jacques Etienne Gay (1786–1864) French botanist
Jacques Gay (1851–1925), French painter
Jamal Gay (born 1989), soccer player from Trinidad and Tobago
Jason Gay (born 1972), birth name of Christian singer-songwriter Jason Gray; made many recordings as Jason Gay before changing his name to Gray
Jean Baptiste Gay, vicomte de Martignac (1778–1832), French statesman
Jennifer Gay (born 1935), on-screen BBC Children's TV continuity announcer
Jesús Bal y Gay (1905–1993), Spanish composer, music critic, and musicologist
Joey Gay (born 1971), American actor and comedian
John Gay (1685–1732), English dramatist
John Gay (disambiguation), various people
Jonathan Gay (born 1967), inventor of Macromedia Flash
Jordan Gay (born 1990), American football kickoff specialist
José Aurelio Gay (born 1965), Spanish football player and manager
José María Pérez Gay (1944–2013), Mexican academic, writer, translator and diplomat
Joseph Louis Gay-Lussac (1778–1850), French physicist
Jotham Gay (1733–1802), army officer, political figure in Nova Scotia
Leslie Gay (1871–1949), English cricketer and footballer
Ludwig Gay, later Ljudevit Gaj (1809–1872), Croatian linguist, politician, journalist and writer
Mabel Gay (born 1983), Cuban triple jumper
Madam Gay (1978–1983), British Thoroughbred racehorse
Maddi Gay (born 1996), Australian rules footballer
Maria Gay (1879–1943), Catalan opera singer
Marie-Louise Gay (born 1952), Canadian children's writer and illustrator
Martin Gay (1726–1809), metal smith and political figure in Nova Scotia
Marvin Gay Sr.