The Baixada Fluminense ( ; meaning Fluminense Lowlands or Fluminense Flats) is a region of the State of Rio de Janeiro, Brazil, between the city of Rio de Janeiro to the south and the Serra dos Órgãos hills to the north, and bordering on Guanabara Bay. Its government is separate from that of the city of Rio de Janeiro, but it is often considered to be part of the city’s greater metropolitan area. The region’s population is about three million, making it the second most populous region in the state, following only the city of Rio de Janeiro itself.
The Baixada Fluminense includes the municipalities of Duque de Caxias, Nova Iguaçu, São João de Meriti, Nilópolis, Belford Roxo, Queimados and Mesquita, all north of the city of Rio de Janeiro. The municipalities of Magé and Guapimirim (to the east), and Japeri, Paracambi, Seropédica and Itaguaí (to the west and the northwest) are also sometimes included in this region.
Read more about Baixada Fluminense: History