Robert Lemaignen (1893–1980) was a right-wing French European Commissioner.
He was appointed as one of 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).
- NATIONAL BANK OF BELGIUM, August 2004 Working Paper on Macroeconomic and Monetary policy-making at the European Commission 1957 to 1969
- Robert Lemaignen 1960 document on the association of Overseas Territories with the European Community