Gaudin is a French surname. Notable people with the surname include:

• André Gaudin, a French rower
• Antoine Marc Gaudin (1900–1974), an American engineer
• Chad Gaudin (born 1983), an American baseball player
• Christian Gaudin (politician) (born 1950), a member of the Senate of France
• Christian Gaudin (handballer) (born 1967), a French team handball player
• Clark Gaudin (1931–2020), an American politician
• Damien Gaudin (born 1986), a French cyclist
• Henri Gaudin (1933–2021), French architect
• Jean-Claude Gaudin (1939-2024), former mayor of Marseille
• Jean François Aimé Théophile Philippe Gaudin (1766-1833), a Swiss pastor, professor and botanist
• Jean Gaudin (1879–1954), French painter, glass and mosaic artist
• Lucien Gaudin (1886–1934), French fencer and Olympic medalist
• Marc Antoine Auguste Gaudin (1804–1880), a French chemistry researcher and inventor of an air vacuum pump
• Martin-Michel-Charles Gaudin (1756–1841), duc de Gaete, a French Minister of Finances
• Michel Gaudin (1931-2023), physicist
• Thibaud Gaudin (c. 1229–1292), a Grand Master of the Knights Templar
• Tidarat Gaudin (1985) Kru A