Girardeau is a French surname. Notable people with the surname include: Arnett Girardeau (1929–2017), American dentist and politician Émile Girardeau (1882–1970), French engineer Isabella Girardeau, opera soprano in the 1711 premiere of Rinalso John Girardeau (18251898), American Presbyterian minister and theologian Marvin D. Girardeau (19302015), quantum physicist and research professor at the University of Arizona
See also Cape Girardeau, a city in southeast Missouri, United States Girardot (disambiguation)