Masianaka is a rural municipality in Madagascar.

It belongs to the district of Vangaindrano, which is a part of Atsimo-Atsinanana Region.

The most important crops are rice and cloves, while other important agricultural products are coffee, cassava, sweet potatoes and pepper.

[2] Masianaka is situated on the East coast of Madagascar on the National road 12A, 30 km south from Vangaindrano.

The first ferry on the National road 12A in direction of Fort Dauphin is in this municipality.