Constant is a surname. Notable people with the surname include:
Benjamin Constant (1767–1830), Swiss-born thinker, writer and French politician Benjamin Constant (Brazil) (1836–1891), Brazilian military man and political thinker David Constant (born 1941), English cricket umpire Edward Constant II (born c. 1942), American historian Emmanuel Constant (bishop) (1928–2009), Roman Catholic Haitian bishop Emmanuel Constant (born 1956), Haitian criminal Eugen Constant (1890–1975), Romanian writer and trade unionist Eugène Constant (1901–1970), French rower F. Woodbridge Constant (1904–1988), American physicist Jean-Joseph Benjamin-Constant, (1845–1902), French painter Kevin Constant (born 1987), Guinean footballer Marius Constant (1925–2004), Romanian-born French composer Paul-Henri-Benjamin d'Estournelles de Constant (1852–1924), French diplomat and politician Pete Constant (born 1963), American politician
See also Constance (name) Constant (given name) Constant-Désiré Benjamin-Constant Benoît-Constant Saint-Constant (disambiguation)