The settlers that came from southern Brazil were the first to arrive in the area. They started the colonization, clearing the land and starting farms. From 1950 to 1970, along with the farms, there also arose small communities based on the production of various crops. The manual labor was provided by small families. Until 1970, Iguassu Falls was considered a small city. In 1950 there were 3,404 inhabitants, in 1960 more than 9,753 inhabitants. The urban population grew from 20,147 inhabitants in 1970 to 101,447 inhabitants in 1980 due to the construction of the Itaipu Binational Hydroelectric Dam. Today there are more than 275,000 people living in Iguassu Falls.
(The demographic data are from The Brazilian Bureau of Demographic Statistics, Rio de Janeiro)