Longueil may refer to:
Communes in France Longueil, Seine-Maritime, in the Seine-Maritime department Longueil-Annel, in the Oise department Longueil-Sainte-Marie, in the Oise department
People Christophe de Longueil, Belgian humanist René de Longueil, French minister in charge of finances under Louis XIII
See also Longueuil, a city in Canada Longueuil (disambiguation)