Robert Lemaignen (15 March 1893 – 3 April 1980) was a 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 was responsible for Overseas development.
Lemaignen had previously been the vice-president of the French Employers Federation (with extensive African experience).
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