William E. King was an United States Army soldier who went missing in action on September 25, 1918 during World War I. He enlisted from Arizona and was assigned as a Private to the 34th Division, 126th Machine Gun Battalion. He was reportedly missing in action in France, but few details are available in his case and no images of him are available.
After his disappearance, he was awarded the Purple Heart and presumably the World War I Victory Medal. His name is also memorialized at the Suresnes American Cemetery and Memorial in Suresnes, France.
King remains part of the 4,223 Americans who remain unaccounted for during World War I. Additionally, he is one of eight Arizonans who are unaccounted for during World War I. Their cases are not under investigation by the Defense POW/MIA Accounting Agency.