São Gonçalo is a municipality in Rio de Janeiro, Brazil, in the Southeast region. It is located in the Metropolitan Region of Rio de Janeiro, havi…São Gonçalo is a municipality in Rio de Janeiro, Brazil, in the Southeast region. It is located in the Metropolitan Region of Rio de Janeiro, having land limits with the municipalities of Niterói, Maricá and Itaboraí, and a maritime limit, by Guanabara Bay, with the capital, Rio de Janeiro. According to the 2022 census, it has a population of 896,744 inhabitants, making it the second most populous municipality in the state and the 18th most populous in the country.