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 Grande do Norte
The Brazilian Institute of Geography and Statistics estimates that the population of Rio Grande do Norte was 3,168,133 on December 1, 2010, a 14.3% increase since the 2000 census. Multiracial people make up 52.48% of the total population. The second largest group composed by white people was 41.15% of the total population, following by black people (5.24%), Asian people (1.04%) and indigenous people 
0.08%.