Machine translation of the Portuguese Wikipedia article (November 2026 version).
Mauá is a municipality in the Metropolitan Region of São Paulo, in the state of São Paulo, Brazil. It belongs to the ABC Paulista region, in the Southeast Zone of Greater São Paulo, in accordance with state law No. 1,139 of June 16, 2011 and, consequently, with the Integrated Urban Development Plan of the Metropolitan Region of São Paulo (PDUI). The population density is 6,753.01 inhabitants per square kilometer. However, the urban density is much higher, since a third of the municipality is industrial area and 10% belongs to the rural area and the Serra do Mar State Park. In 2014 it was the 20th municipality in the state by gross domestic product. With 418,261 inhabitants (2022 Census), Mauá is the 15th most populous municipality in the state of São Paulo and the 57th most populous in Brazil.
The municipality of Mauá was named in honor of Irineu Evangelista de Sousa, the “Baron of Mauá”, an important businessman and industrialist of the Empire of Brazil. The name derives from Mauá Station, opened in 1867 by the São Paulo Railway, a railway associated with the industrial and railway development driven by the Baron of Mauá. The station gave rise to the urban nucleus that later developed into the present-day municipality.
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