Rio de Janeiro
Rio has more people living in slums than any other city in Brazil, according to the 2010 Census. More than 1,500,000 people live in its 763 favelas, 22% of Rio's total population. São Paulo, the largest city in Brazil, has more favelas (1,020) in sheer numbers, but proportionally has fewer people living in favelas than Rio.
Demographics of Rio de Janeiro
People of Portuguese ancestry predominate in most of the state. The Brazilian census of 1920 showed that 39,74% of the Portuguese who lived in Brazil lived in Rio de Janeiro. Including all of the Rio de Janeiro, the proportion raised to 46,30% of the Portuguese who lived in Brazil. The numerical presence of the Portuguese was extremely high, accounting for 72% of the foreigners who lived in the capital. Portuguese born people accounted for 20,36% of the population of Rio, and those with a Portuguese father or a Portuguese mother accounted for 30,84%. In other words, native born Portuguese and their children accounted for 51,20% of the inhabitants of Rio, or a total of 267664 people in 1890.