Oxford South was a federal electoral district represented in the House of Commons of Canada from 1867 to 1935.

It was created by the British North America Act of 1867.

In 1882, the South Riding of the county of Oxford consisted of the town of Ingersoll, the village of Norwich, and the townships of Oxford East, Oxford West, Oxford North, Norwich North, Norwich South, Burford and Oakland.

In 1903, the riding was redefined to include the township of Dereham and the town of Tilsonburg, and to exclude the townships of Burford and Oakland.

The electoral district was abolished in 1933 when it was merged into Oxford riding.