Moreau is a French surname. Notable people with the surname include:

• Adrien Moreau (1843–1906), French genre and historical painter, sculptor and illustrator
• Alicia Moreau (1885–1986), Argentine politician and activist
• Art Moreau, American politician
• Arthur S. Moreau Jr. (1931-1986), American Military Leader
• Basil Anthony Marie Moreau (1799–1873), French priest
• Cecilia Moreau, Argentine politician
• Charles Paul Narcisse Moreau (1837–1916), French soldier and mathematician (and possible chess player)
• Christophe Moreau (born 1971), French cyclist
• Corrie Moreau, American entomologist
• Daniel Moreau Barringer (1806–1873), American politician
• Émile Moreau (disambiguation)
• Ethan Moreau (born 1975), Canadian ice hockey player
• Fabian Moreau (born 1994), American football player
• Foster Moreau (born 1997), American football player
• Gustave Moreau (1826–1898), French Symbolist painter and sculptor
• Hégésippe Moreau (1810–1838), French lyric poet
• Hervé Moreau, étoile at the Ballet de l'Opéra National de Paris
• Jacques Moreau (1933–2017), French politician
• Jacques-Joseph Moreau (1804–1884), French psychiatrist
• Jean-Baptiste Moreau (1656–1733), French composer
• Jean Jacques Moreau (1923-2014), French mathematician
• Jean-Michel Moreau (1741-1814), French illustrator and engraver
• Jean Victor Marie Moreau (1763–1813), French general
• Jeanne Moreau (1928-2017), French actress
• Leopoldo Moreau (born 1946), Argentine politician
• Louis Moreau-Lislet (1767-1832), distinguished Louisiana jurist and translator
• Lucien Moreau (1875–1932), French journalist, monarchist and member of the Action Française.
• Madeleine Moreau (1928 – 1995), French Olympic diver
• Marguerite Moreau (born 1977), American actress
• Mary Moreau, Canadian jurist and justice of the Supreme Court of Canada
• Mathieu Moreau (born 1983), French footballer
• Mathurin Moreau (1822–1912), French sculptor
• Mederic Louis Elie Moreau de Saint-Mery (1750–1819), French historian and lawyer
• Pierre Moreau (born 1957), Canadian politician
• Reginald Ernest Moreau (1897–1970), British ornithologist
• Sophia Moreau (born 1972), Canadian philosopher
• Stéphane Moreau (politician) [fr] (born 1964), Belgian politician
• Stéphane Moreau (born 1971), French footballer
• Sylvie Moreau (born 1964), Canadian actress
• Yolande Moreau (born 1953), Belgian actress and film director
• Yves Moreau, Belgian professor of engineering