Filleul is a French surname. Notable people with the surname include:
Adelaide Filleul, Marquise de Souza-Botelho (1761–1836), French writer Clara Filleul (1822–1878), French painter and author Don Filleul (1926–2016), Jersey politician Nicolas Filleul de La Chesnaye (1530–1575), French poet Philip Filleul (1885–1974), English rower Rosalie Filleul (1752–1794), French pastellist and painter
See also Jeanne Filleul-Brohy (1867–1937), French croquet player