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
Rio de Janeiro has the second largest GDP of any city in Brazil, surpassed only by São Paulo. According to the IBGE, it was approximately US$201 billion in 2008, equivalent to 5.1% of the national total. Taking into consideration the network of influence exerted by the urban metropolis (which covers 11.3% of the population), this share in GDP rises to 14.4%, according to a study released in October 2008 by the IBGE.