The Buchanan County Sheriff's Department responded to a call at 4600 Huntoon Road, just north of St. Joseph earlier Thursday night.
Deputies say the victim is alive and was found near the Sunbridge Conservation Area.
A car was also found in the area.
Deputies and a K-9 unit were conducting a search near the area where the car and victim were found.
The sheriff's department would not release any further information.
Anyone with information is asked to call the tips hotline at 816-238-8477.