Louis Charles Marie de La Trémoille (28 March 1863 – 17 June 1921), 10th Duke of Thouars, 16th Count of Laval was a French nobleman and the son of Louis Charles de La Trémoille and his wife Marguerite Églé Jeanne Caroline Duchâtel (daughter of Count Charles Marie Tanneguy Duchâtel, Count Duchâtel and his wife Rosalie ("Eglé") Paulée) La Trémoille was a deputy for Gironde from 1906 to 1919, and mayor of Margaux from 1904 to 1919. He was a member of the democratic left.