| Official Name: | Amboasary Sud |
| Other Name: | Amboasary Atsimo |
| Pushpin Map: | Madagascar |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Madagascar |
| Pushpin Mapsize: | 180 |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Anosy |
| Subdivision Type2: | District |
| Subdivision Name2: | Amboasary Sud |
| Leader Title: | Mayor |
| Leader Name: | Richard Joseph Rakotonirina |
| Area Total Km2: | 248 |
| Population As Of: | 2018 |
| Population Total: | 45,989 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Timezone: | EAT |
| Utc Offset: | 3 |
| Coordinates: | -25.05°N 69°W |
| Elevation Footnotes: | [1] |
| Elevation M: | 26 |
| Postal Code Type: | postal code |
| Postal Code: | 603 |
Amboasary Sud (Amboasary Atsimo) is a town in Anosy, Madagascar. It is the main town of Amboasary Sud District.It has a population of 45,989 in 2018.
It is located at the Mandrare River which since 1957 is crossed by a steel bridge of 414m was built, that was designed by Anciens Ets Eiffel.[2] It is situated 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.[3]
The Anony Lake (2 300 ha) at 17 km south from Amboasary Sud and the Ranofotsy Lake (500ha).[4]
The town is linked to Fort-Dauphin by the National road 13 (73 km).