thumb|250px|Charles-Louis Huguet de Sémonville
Charles Louis Huguet, 1st Marquis of Sémonville (9 March 175911 August 1839) was a French diplomat and politician. He was made a count of the First French Empire in 1808, and marquis in 1819.
Biography
Born in Paris on as the son of one of the royal secretaries, he became Minister and Envoy Extraordinary of France to the Republic of Genoa in 1790–1791. He was instructed by Charles François Dumouriez to go to Turin and attempt to break off the alliance between Victor Amadeus III of Sardinia and the Habsburg monarchy, but was not permitted to cross the Sardinian frontier.
In 1799 Napoleon Bonaparte, through whose influence his release had been obtained, sent him to as an envoy of the French Consulate to the Hague, in order to consolidate the alliance between France and the Batavian Republic. He was entirely successful, and he is credited with another diplomatic success in the negotiations leading to the "Austrian marriage" between Napoleon and Marie Louise of Habsburg.