Mantasoa is a town and commune in Madagascar. It belongs to the district of Manjakandriana, which is a part of Analamanga Region. The population of the commune was estimated to be approximately 10,000 in 2001 commune census.
Mantasoa is served by a local airport. In addition to primary schooling the town offers secondary education at both junior and senior levels. The majority 95.5% of the population of the commune are farmers, while an additional 0.5% receives their livelihood from raising livestock. The most important crop is rice, while other important products are beans, cassava and sweet potatoes. Services provide employment for 3% of the population. Additionally fishing employs 1% of the population.