Croissant (French for "crescent") is a French surname. Notable people with the surname include:
Aurel S. Croissant (born 1969), German political scientist and academic Benoît Croissant (born 1980), French footballer Francis Croissant (1935–2019), French archaeologist, art historian and academic Klaus Croissant (1931–2002), German lawyer, spy and political activist Odile Croissant (1923–2020), French biologist, physicist and specialist in electron microscopy
See also Croissant, a French Viennoiserie Lady Croissant, a live album by Australian singer Sia