Soamatasy is a rural municipality in Madagascar. It belongs to the district of Ihosy, which is a part of Ihorombe Region. The population of the commune was estimated to be approximately 3,000 in 2001 commune census.

Only primary schooling is available. The majority 55% of the population of the commune are farmers, while an additional 43% receives their livelihood from raising livestock. The most important crops are rice and beans, while other important agricultural products are peanuts, maize and cassava. Services provide employment for 2% of the population.

Soamatasy is situated at 50 km from Ihosy.

22°40′S 46°0′E / 22.667°S 46.000°E / -22.667; 46.000