Niagara police say they received a 911 call from the child's father who was responsible for the child at the time of the incident.
The Toyota was stolen in St Catharines from the area of Welland Ave and Geneva St. around 2:30pm. The car had been left unattended with the child inside.
Police have not made any arrests.
They say the suspect responsible for the theft of the Toyota is still outstanding.
The child has since been located in Grimsby and is "safe and in good health,"
A short time later the vehicle was located by Hamilton police in Hamilton.