Atsimo - Atsinanana (translated: South- East) is one of the 22 regions of Madagascar. It belongs to the (former) Fianarantsoa Province in the southeast of the island. In 2004, 621 200 inhabitants living in the region.
The region Atsimo - Atsinanana has an area of 18,863 km ². Capital is Farafangana.
The region Atsimo - Atsinanana is divided into 5 districts: