Caillard is a surname of French origin. Notable people with the surname include:
Camille Caillard (1822–1898), British barrister and judge Marc-Aurèle Caillard (born 1994), French footballer Philippe Caillard (1924–2026), French choral conductor Stéphane Caillard (born 1988), French actress and comedienne Sir Vincent Caillard (financier) (1856–1930), British army officer, financier and alderman Lieutenant Colonel Felix Digby Caillard MC, Bar (1894–1955), British Army Officer Air Vice Marshal Hugh Anthony Caillard, CB RAF (1927–2022), Royal Air Force officer and aviator Hugh Andrew Caillard MW (born 1959), Master of Wine and Australian wine expert