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
Many Brazilians of colour consider it more advantageous to identify themselves as pardos and therefore do so. About one-third of Rio's pardos are clearly mulattoes (mulatos; people of mixed African and European ancestry), while the vast majority of the city's small preto population do not claim any known European ancestry. Cariocas are primarily Roman Catholic, although many simultaneously observe the practices of the Umbanda religion.