Robert Lemaignen (15 March 1893 – 3 April 1980) was a right-wing French European Commissioner. He was appointed as one of the first French European Commissioners on the first Hallstein Commission from 1958 to 1962. He did not remain a member of the second Hallstein commission and was succeeded as commissioner by Henri Rochereau. Lemaignen had responsibility for Overseas development. Lemaignen had previously been the vice-president of the French employers federation (with extensive African experience).