Marjorie West is a missing American child who disappeared on May 8, 1938. She was about to turn 5 years old when she was taken from McKean County, Pennsylvania on May 8, 1938. Her disappearance was heavily covered by both local and national media, but her whereabouts have never been ascertained. In 2018, The Guardian, a British daily newspaper, and the National Center for Missing and Exploited Children, a nonprofit organization established by the United States Congress, referred to Marjorie West's disappearance as "the great unsolved mystery of the missing".