Daigneault is a surname. Notable people with the surname include:
Barbara Daigneault, victim of the École Polytechnique massacre in 1989 in Montreal, Quebec, Canada Doug Daigneault (born 1937), Canadian Football League player Frédéric-Hector Daigneault (1860–1933), Canadian provincial politician J. J. Daigneault (born 1965), retired Canadian professional ice hockey defenceman Julie Daigneault (born 1965), former international freestyle swimmer from Canada Mark Daigneault (born 1985), American basketball coach
See also Dagneux Daignet Diagnal