Mahavelo is a town and commune in Madagascar. It belongs to the district of Farafangana, which is a part of Atsimo-Atsinanana Region. The population of the commune was estimated to be approximately 8,000 in 2001 commune census.

Only primary schooling is available. The majority 98% of the population of the commune are farmers. The most important crop is rice, while other important products are bananas, coffee and cassava. Services provide employment for 1.5% of the population. Additionally fishing employs 0.5% of the population.

Mahavelo lies on the Manampatrana River.

22°42′S 47°42′E / 22.700°S 47.700°E / -22.700; 47.700