Lemuel Durbin Williams (1830 - July 31, 1865) was an American draftsman and Army veteran. Williams worked as a draughtsman for the United States Coast Survey, the Northwest Boundary Survey Office, and the Treasury Department. He served as a member of the Washington Light Infantry in the years before the American Civil War, and joined the Washington Light Infantry on April 10, 1861, for a three month tour of duty. He entered as a 1st Lieutenant and was promoted to Captain before being mustered out on July 10, 1861.He married Sarah Magdeline O'Donnell on December 31, 1851, with whom he had five or six children, the historical record is unclear. He died on July 31, 1865 after suffering from 'congestion of the brain' per his obituary.