After the expedition, Clark would serve as governor of the Missouri Territory (from 1813-1820) and he continued to lead Native American affairs for 30 years, enjoying a high reputation as an authority on the West. Many hunters, adventurers and explorers would visit him in St. Louis for advice. He died at age 69, on September 1, 1838, while at the home of his son, Meriwether Lewis Clark. His cause of death is unknown and is only described as a "brief illness."
William A. Clark died on 1925-03-02.
William Mortimer Clark died in 1915.
William Harold Clark died in 1913.
William Henry Clark died in 1952.
William Clark - boxer - died in 1988.
William Leon Clark died in 2005.
William George Clark died in 1878.
William Robinson Clark died in 1912.
William Clark Falkner died in 1889.
William Clark Noble died in 1938.
William Bell Clark died in 1968.
William D. Clark died in 1985.