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.
Rio de Janeiro
As a result of the influx of immigrants to Brazil from the late 19th to the early 20th century, also found in Rio de Janeiro and its metropolitan area are communities of Levantine Arabs who are mostly Christian or Irreligious, Spaniards, Italians, Germans, Japanese, Jews, and people from other parts of Brazil. The main waves of internal migration came from people of African, mixed or older Portuguese (as descendants of early settlers) descent from Minas Gerais and people of Eastern European, Swiss, Italian, German, Portuguese and older Portuguese-Brazilian heritage from Espírito Santo in the early and mid-20th century, together with people with origins in Northeastern Brazil, in the mid-to-late and late 20th century, as well some in the early 21st century (the latter more directed to peripheries than the city's core).