Ballinacor South (Irish: Baile na Corra Theas) is a barony in County Wicklow, Ireland.

Baronies were created after the Norman invasion of Ireland as divisions of counties and were used in the administration of justice and the raising of revenue.

The barony derives its name from the Ballinacor Castle (Irish: Baile na Corra, town of the weir).

[citation needed] List of civil parishes in the barony: Kilcommon, Preben, Kilpipe.

Below is a list of settlements in Ballinacor South: This article related to the geography of County Wicklow, Ireland is a stub.