Claude Bouthillier, Sieur de Fouilletourte (1581 – 13 March 1652) was a French statesman and diplomat. He held a number of offices, including Secretary of State and Superintendent of Finances, and distinguished himself in diplomacy throughout the 1630s, particularly in respect to France's entry into the Thirty Years' War.
He was a shrewd diplomat who enjoyed exceptional favour with all factions of the French court, particularly Cardinal Richelieu and Marie de Medici. At the height of his power he was the second most powerful man in France after Richelieu himself.