Fifteen-year-old Mark Calvin, a Black male with brown hair and brown eyes, was last seen in Clayton, Missouri, on August 6, 2025. He is 5 feet 7 inches tall and was reported to weigh 110 pounds. The St. Louis County Police Department is investigating and the Missouri State Highway Patrol lists his case as an active missing juvenile.

Details about where Mark was or what he was wearing when last seen have not been widely released. His family has been left waiting for news, and both local law enforcement and the Missouri State Highway Patrol Missing Persons Clearinghouse are involved in the search. Anyone with information is asked to contact the St. Louis County Police Department at 636-529-8210 or the Missouri State Highway Patrol Missing Persons Clearinghouse at 573-526-6178 or [email protected].

Did anyone in Clayton or the surrounding area see Mark on or after August 6, 2025, or have information that could help locate him?