Barra Mansa is a Brazilian municipality located in the south of the state of Rio de Janeiro.
It is in the microregion of the Paraíba Valley, within the mesoregion of the South Fluminense. It is located at latitude 22º32'39 "south, longitude 44º10'17" west and altitude of 381 meters. Its estimated population in 2020 was of 184,833 inhabitants, forming a conurbation with the cities of Volta Redonda and Pinheiral with a population of more than 450 thousand inhabitants. It has an area of 548.9 km².
The administrative and legislative center is in the Centro district. In it are located the city hall and the City Hall). The judicial center is the Barbará neighborhood, where the municipal forum is located.
In 1954 the district of Volta Redonda was emancipated and, in 1991, it was Quatis's turn, taking with him the districts of Ribeirão de São Joaquim and Falcão.