William Stourton, 11th Baron Stourton (c. 1594 – 25 April 1672) was the son of Edward Stourton and Frances Tresham. He married Frances Moore (d. 5 January 1662), daughter of Sir Edward More. William and Frances had five children;
His eldest son William died young and childless, and he was succeeded by his grandson William, son of Edward.
William was a Cavalier and a Catholic, and suffered heavily due to this. Stourhead, his home, was at one point garrisoned for the King and then, in September 1644, was ravaged by General Ludlow.