| Manambaho River | |
| Name Other: | Manambao Maty |
| Map: | Madagascar rivers.svg |
| Subdivision Type1: | Country |
| Subdivision Name1: | Madagascar |
| Subdivision Type3: | Region |
| Subdivision Name3: | Melaky, Bongolava |
| Subdivision Type5: | City |
| Subdivision Name5: | Morafenobe |
| Mouth Location: | Channel of Mozambique |
| Mouth Coordinates: | -17.7133°N 43.9828°W |
Manambaho is a river in Melaky & Bongolava in western Madagascar.
It flows down from central Madagascar into the Mozambique Channel and the Indian Ocean.Its springs are near Tsiroanomandidy (Bongolava), it passes near Morafenobe and it empties south of Tambohorano and north of Maintirano.