Masoarivo is a town and commune (Malagasy: kaominina) in western Madagascar. It belongs to the district of Antsalova, which is a part of Melaky Region. The population of the commune was estimated to be approximately 8,000 in 2001 commune census. Masoarivo is served by a local airport and riverine harbour. Primary and junior level secondary education are available in town. The majority 54% of the population of the commune are farmers, while an additional 23% receives their livelihood from raising livestock. The most important crop is rice, while other important products are bananas, coconuts, maize and cassava. Services provide employment for 3% of the population. Additionally fishing employs 20% of the population.
