Mahieu is both a surname and a given name. Notable people with the name include:
Surname: Albert Mahieu (1860-1926), French politician. Jacques de Mahieu (1915–1990), French Argentine anthropologist and Peronist Jesse Mahieu (born 1978), Dutch field hockey player Thomas Mahieu, 16th-century French politician and bibliophile
Given name: Mahieu de Gant, Flemish trouvère Mahieu le Juif, French trouvère Mahieu de Quercy, French troubadour
See also Matthew (disambiguation)