| Mandrare River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Madagascar |
| Subdivision Type3: | Region |
| Subdivision Name3: | Anosy |
| Subdivision Type5: | Cities |
| Subdivision Name5: | Mahaly, Amboasary Sud, Berenty, Mahaly |
| Length Km: | 270 |
| Source1 Location: | Beampingaratra massif near Trafonaomby peak |
| Source1 Elevation: | 1800m (5,900feet) |
| Mouth: | Indian Ocean |
| Mouth Location: | Anosy |
| Mouth Coordinates: | -25.1739°N 46.4333°W |
| Mouth Elevation: | 0m (00feet) |
| Progression: | Amboasary Sud |
| Basin Size Km2: | 12435 |
| Basin Size Ref: | [1] |
| Tributaries Left: | Manambovo River (above Mahaly), Mananara River (Anosy) (above Amboasary Sud) |
| Tributaries Right: | Andratina River |
Mandrare is a river in the region of Anosy in southern Madagascar. It flows into the Indian Ocean near Amboasary Sud. It becomes dry in certain months of the year.[1]
In 1957, near Amboasary Sud a steel bridge of 414m was built, that was designed by Anciens Ets Eiffel.