Mananjary is a city on the East coast of Madagascar with a population of 25,222 inhabitants in 2018.

It contains a town of the same name, situated on the southern part of the east coast, where the Mananjary River flows into the Indian Ocean.

Mananjary is situated 130 km south of Nosy Varika on the RN 11[3] and 167 km north of Manakara by the National road 12 and National road 25.

In 2022 Cyclone Batsirai made landfall at Mananjary, leaving the city 90% destroyed.

The small Antambahoaka tribe holds a ceremonial mass circumcision rite every seven years in the village, called "Sambatra.