Her family says the 16 year old would never run away, and were concerned when she didn't return home Friday afternoon.
The Eaton County Sheriff's Department is on the case, treating Jennifer as a missing person. Sgt. Jim West says they have no evidence of an abduction, but are pursuing all leads.
West says if Jennifer is not found by next week, it is likely federal authorities may be called in.
Jennifer Jay Baker is 16 years old, 5'3" tall, 140 lbs. She has shoulder-length sandy brown hair, usually worn up.
She was last seen wearing blue jeans, carrying a maroon duffel bag with Eaton Rapids Greyhoudnds on the front.
If you have any information on Jennifer's whereabouts, call the Eaton County Sheriff's Dept at 517-543-3512.