| Administrative Region | Main sites | Area (ha) | % of all Eastern mangroves of Madagascar |
| Diana | Irodo | 1160 | 27.23 |
| Ambodivahibe | 600 | 14.08 | |
| Rigny | 2071 | 48.62 | |
| Analanjirôfo | Sainte Marie | 173 | 4.06 |
| Manompana | 98 | 2.30 | |
| Mananara Nord | 100 | 2.35 | |
| Tampolo | <0.5 | <0.01 | |
| Atsinanana | Foulpointe | <2 | <0.05 |
| AtsimoAtsinanana | Farafangana | <50 | <1.17 |
| Anosy | Fort Dauphin | <50 | <1.17 |