Dionísio is a municipality in the state of Minas Gerais, Brazil.

The city belongs to the mesoregion Metropolitana de Belo Horizonte and to the microregion of Itabira.

As of 2020, the estimated population was 7,609.

[4] The municipality contains part of the 35,970 hectares (88,900 acres) Rio Doce State Park, created in 1944, the first state-level conservation unit in Minas Gerais.

This geographical article relating to Minas Gerais is a stub.