Bibb County sheriff's Sgt. Sean DeFoe says the car was stolen from a gas station late Saturday night with the sleeping child in the back seat.
WMAZ-TV reports that two adults who were in the car had left it running as they stopped at the Sunoco Station on Hartley Bridge Road, and someone then stole the vehicle.
Sheriff's officials say they used GPS on a phone left in the car to find out where it had been taken. They found the car abandoned at an apartment complex, with the girl still asleep in the backseat and unharmed.
DeFoe says investigators are trying to find out who took the car.