Ambalasoa is a town and commune in Madagascar. It belongs to the district of Betroka, which is a part of Anosy Region. The population of the commune was estimated to be approximately 4,000 in 2001 commune census.
Only primary schooling is available. The majority 95% of the population of the commune are farmers, while an additional 3% receives their livelihood from raising livestock. The most important crop is rice, while other important products are peanuts, beans and cassava. Services provide employment for 2% of the population.