South Madarsha Union (Bengali: দক্ষিন মাদার্সা) is a union of Hathazari Upazila of Chittagong District.
Area of South Madarsha: 2,416 acres (9.78 km2).
North: North Madarsha Union
East: Raozan Upazila
South: Shikarpur Union
West: Chikandandi Union
At 1991 census, South Madarsha union had a population of 16,722 and house units 2587.