Norfolk South was a federal electoral district represented in the House of Commons of Canada from 1867 to 1904.
It was created by the British North America Act of 1867 which divided the county of Norfolk into two ridings.
In 1882, the town of Simcoe and the village of Port Dover were added to the riding.
In 1892, South Norfolk was defined as above, with the addition of the township of Walpole and the village of Port Rowan.
The electoral district was abolished in 1903 when it was redistributed between Haldimand and Norfolk ridings.