Williams was shot in the head and killed during an ambush by the French and their Indian allies in the Battle of Lake George on September 8, 1755 at the age of 40. Members of his regiment hid his body after the battle to prevent it from being desecrated. They later buried Williams nearby. His body was disinterred in the early 20th century and moved to the chapel at Williams College. A stone etched with Williams' initials on it and the year of his death still stands at the original Lake George gravesite just across the street from a monument erected by Williams College alumni. The monument marks the site of the ambush, which was called the Bloody Morning Scout.