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 (born 1931), an American politician
Damien Gaudin (born 1986), a French cyclist
Jean-Claude Gaudin (born 1939), the current mayor of the French city 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), the great French fencer and Olympic medalist
Martin-Michel-Charles Gaudin (1756–1841), duc de Gaete, a French Minister of Finances
Marc Antoine Auguste Gaudin (1804–1880), a French chemistry researcher and inventor of an air vacuum pump
Thibaud Gaudin (c. 1229–1292), a Grand Master of the Knights Templar