Mamonas is a municipality in the north of the Brazilian state of Minas Gerais.
The municipality contains part of the 53,264 hectares (131,620 acres) Caminho dos Gerais State Park, created in 2007.
It is connected by poor roads to the regional center of Janaúba to the south.
With irrigation Jaíba has managed to produce a range of agricultural products.
The main economic activities are cattle raising (12,000 head in 2006) and farming with production of cotton, citrus fruits, beans (1,220 ha.