Miarinarivo is a town and commune in Madagascar. It belongs to the district of Ambalavao, which is a part of Haute Matsiatra Region in Fianarantsoa Province. The population of the commune was estimated to be approximately 10,000 in 2001 commune census.
Only primary schooling is available. The majority 99% of the population of the commune are farmers. The most important crop is rice, while other important products are cassava, sweet potatoes and tobacco. Services provide employment for 1% of the population.