Five of the top ten metropolitan areas are in Brazil. These metropolitan areas all have a population of above 4 million and include the São Paulo metropolitan area, Rio de Janeiro metropolitan area, and Belo Horizonte metropolitan area. Whilst the majority of the largest metropolitan areas are within Brazil, Argentina is host to the second largest metropolitan area by population in South America: the Buenos Aires metropolitan region, above 13 million.
five of the top ten metropolitan areas are in brazil these metropolitan areas all have a population of above 4 million and include the são paulo metropolitan area rio de janeiro metropolitan area and belo horizonte metropolitan area whilst the majority of the largest metropolitan areas are within brazil argentina is host to the second largest metropolitan area by population in south america the buenos aires metropolitan region above 13 million