The War of 1812 drew attention to the militarily strategic region between Lake Simcoe and Georgian Bay. To provide supplies to the excellent harbour at Penetanguishene, a road of about 35 km was surveyed c. 1813 between the two bodies of water. That road did not actually become a functional road for about 30 years after it was surveyed. In the meantime, townships were created and surveyed on both sides of the Penetanguishene Rd c. 1820. Oro Township was one of those townships. Although there is no documentation about the origin of the name "Oro" it is assumed it came from the Spanish word for gold.