Pairwise estimates of F(st) among the five Brazilian geopolitical regions suggested little genetic differentiation only between the South and the remaining regions. Brazilians tend to consider "Native South American" a cultural, not racial category. In 2018, Brazil's population density was estimated at around 25.06 people per square kilometer, up from almost 24.9 inhabitants per square kilometer a year earlier. The number of actual Turks who immigrated to Brazil was in fact very small. .
The study confirms the fast-paced aging process of Brazil’s population. Communities with Italian immigrants were also created in southern Brazil. Nearly one million Europeans had arrived in Brazil by 1800; most of them colonists from Portugal. , Birth rate: The proportion of women aged 45 to 49 without children was 8.2% in 2013 among those with less education and 15.1% among those with more years of schooling. The Amerindians make up 0.4% of Brazil's population, or about 700,000 people. When the first Portuguese arrived in Brazil, in 1500, there were between 2.5 and 3.2 million Natives living in the country. A population pyramid illustrates the age and sex structure of a country's population and may provide insights about political and social stability, as well as economic development. Brazil has received the third largest number of immigrants in the Western Hemisphere, after the United States and Argentina. , An additional figure of 1.2 million Portuguese arrived between 1951 and 1975 to settle mostly in the Southeast. This region did not have much effect from the massive European immigration that took place in Southern Brazil in the late 19th century and first decades of the 20th century. Of those who reported residing in another country less than 10 years before the 2000 census, 66.9 percent were Brazilians.  The region, since the beginning of its colonization, is a melting pot of Africans, Indians, and Europeans. The city of Bastos, in São Paulo, is 11.4% Japanese. Brazil attracted nearly 5 million immigrants between 1870 and 1953. Brazil has conducted a periodical population census since 1872. The immigration restarted after 1845 with the creation of new colonies.  The first region to be settled by the Portuguese was Northeastern Brazil, followed by the Southeast region. Since 1940, this census has been carried out decennially. , According to another autosomal DNA study from 2008, by the University of Brasília (UnB), European ancestry dominates in the whole of Brazil (in all regions), accounting for 65.90% of heritage of the population, followed by the African contribution (24.80%) and the Native American (9.3%). Notably, the first half of the 20th century saw a large inflow of Japanese (mainly from Honshū, Hokkaidō and Okinawa) and Arab Christians from Lebanon and Syria.