Santiago located in the administrative territorial entity Santiago Metropolitan Region
The growth of Santiago has undergone several changes over the course of its history. In its early years, the city had a rate of growth 2.9% annually until the 17th century, then down to less than 2% per year until the early 20th century figures. During the 20th century, Santiago experienced a demographic explosion as it absorbed migration from mining camps in northern Chile during the economic crisis of the 1930s. The population surged again via migration from rural sectors between 1940 and 1960. This migration was coupled with high fertility rates, and annual growth reached 4.9% between 1952 and 1960. Growth has declined, reaching 1.4% in the early 2000s. The size of the city expanded constantly; The 20,000 hectares Santiago covered in 1960 doubled by 1980, reaching 64,140 hectares in 2002. The population density in Santiago is 8,464 inhabitants/km2.
The population of Santiago has seen a steady increase in recent years. In 1990 the total population under 20 years was 38.0% and 8.9% were over 60. Estimates in 2007 show that 32.9% of men and 30.7% of women were less than 20 years old, while 10.2% of men and 13.4% of women were over 60 years. For the year 2020, it is estimated that the figures will be 26.7% and 16.8%.
4,313,719 people in Chile say they were born in one of the communes of the Santiago Metropolitan Region, which, according to the 2002 census, amounts to 28.5% of the national total. 67.6% of the inhabitants of Santiago claim to have been born in one of the communes of the metropolitan area. In communes such as Santiago Centro and Independencia, according to 2017 census, 1/3 of residents is a Latin American immigrant (28% and 31% of the population of these communes, respectively). Other communes of Greater Santiago with high numbers of immigrants are Estación Central (17%) and Recoleta (16%).
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