Mariana Corona was in her mother's car when it was stolen from a Morgan Hill parking lot Tuesday afternoon.
The car and the infant were found in Salinas, which is about 40 miles away from Morgan Hill.
Police say the child's mother left the car running with the baby inside when she briefly went in to a church food pantry to get some groceries. When she came back out, the car was gone.
Police are not revealing whether the person who stole the car has been arrested.