Amboasary Sud (Amboasary Atsimo) is a district located in Anosy Region, Madagascar. It has a population of 275,397 in 2020.
It is located at the Mandrare River, approximately 75 km from Fort-Dauphin and 35 km from Ambovombe.
The economy of the town is dominated by sisal plantations and 3 transforming companies.
The district is further divided into 17 communes: