Raynaud or Reynaud is a surname. Notable people with the surname include:

• Alexis Raynaud (born 1994), French sport shooter
• Alix Raynaud (born 1974), French executive producer and line producer
• André Raynaud (1904–1937), French cyclist
• Cecile Reynaud, volleyball player
• Émile Reynaud (1844–1918), animator and inventor
• Charles Ceccaldi-Raynaud (born 1925), French politician
• Colette Reynaud (1872–1965), French feminist, socialist and pacifist journalist
• Darius Reynaud (born 1985), American football player
• Fernand Raynaud (1926–1973), stand-up comic
• Jean Reynaud (1806–1863), philosopher
• Jordy Mont-Reynaud (born 1983), chess master
• Joëlle Ceccaldi-Raynaud (born 1951), politician
• Louis Raynaud, dit Blanchard (1789–1868), politician
• Marie-Line Reynaud (born 1954), politician
• Maurice Raynaud (1834–1881), doctor, discovered Raynaud syndrome
• Michel Raynaud, (1938–2018), mathematician
• Michèle Raynaud, (born 1938), mathematician
• Paul Reynaud (1878–1966), politician
• Raynald of Châtillon (1125–1187), knight
• Regnaud de La Porte (Raynaud) (died 1325), bishop and Cardinal
• Romain Reynaud (born 1983), Association football player
• Serge Raynaud de la Ferriere (1916–1962), philosopher
• Stéphane Reynaud, chef and cookery writer
• Théophile Raynaud (1583–1663), theologian
• Yelda Reynaud (born 1972), actress