Campinas is a Brazilian municipality in São Paulo State, part of the country's Southeast Region. According to the 2020 estimate, the city's population is 1,139,047, making it the fourteenth most populous Brazilian city and the third most populous municipality in São Paulo state, the fifth most populous municipality in Southeast Brazil, and the largest city in Brazil outside the metro region of a state capital. The city's metropolitan area, Metropolitan Region of Campinas, contains twenty municipalities with a total population of 3,656,363 people.