Araçuaí is a Brazilian municipality located in the northeast of the state of Minas Gerais in the Jequitinhonha River valley. The Araçuaí River, a tributary of the Jequitinhonha, flows through it. Its population as of 2007 was estimated to be 36,083 people living in a total area of 2,235 km². The city belongs to the mesoregion of Jequitinhonha and to the microregion of Araçuaí. The city is the seat of the Roman Catholic Diocese of Araçuaí. The elevation of the municipal seat is 307 meters. It became a municipality in 1870.