Machine translation of the Portuguese Wikipedia article (November 2026 version).
Santa Bárbara d'Oeste is a Brazilian municipality in the interior of the state of São Paulo. It belongs to the Campinas mesoregion and microregion, lying northwest of the state capital, about 138 km from it. It covers an area of 271.492 km², of which 82 km² is urban perimeter. According to the 2022 census its population was 183,347 inhabitants, making it the 44th most populous municipality in São Paulo and the sixth in the Campinas Metropolitan Region, of which it is part. The city is part of the Expanded Metropolitan Complex, the macrometropolis that exceeds 30 million inhabitants and accounts for roughly 75% of the population of São Paulo state.
The city was emancipated from Constituição (now Piracicaba) in the 1900s. Its founding, however, is considered to have taken place in 1818, the year the parish church was built; its anniversary is 4 December, in honour of its patron saint Santa Bárbara, who also gave the municipality its name. Margarida da Graça Martins is considered the founder of the city, having donated the land on which the parish church was built, which makes her the first woman to found a municipality in Brazil. The city is also regarded as the cradle of the automobile industry in Brazil, since it produced the country's first automobile. Today Santa Bárbara d'Oeste consists only of its seat, with no districts, and is subdivided only into its just over 130 neighbourhoods.
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