South Georgetown was a region in the center of the Seigniory of Beauharnois. It was bounded on the northwest by the Châteauguay River and the North Georgetown region of the seigniory, on southwest by the Jamestown region (boundary line is Brysonville Sideroad), on southeast by Russelltown region and on the northeast by the English River and Williamstown region. It is now mostly within the Howick/Tres St-Sacrement Municipality.