Starting in the 19th century, Rio Claro attracted large numbers of immigrants from European countries, especially from Germany, Switzerland and Italy, but also from Spain, Portugal, some Eastern European countries, and a substantial community of Christian Arabs from the then Ottoman Empire (mostly Syrian and Lebanese).

Rio Claro used to play a very important role in the railway system of São Paulo state.

Around 1,000 BP, the ancient peoples were replaced by the semi-sedentary Tupi-Guarani, whom the Portuguese later found spread out along the coast when they arrived in Brazil at the beginning of the 16th century.

In the Rio Claro region, they inhabited areas near the current population centers (towns and cities), coinciding with them in some cases.

[8] The company is currently an operator of cell phones, fixed lines, internet (fiber optics/4G) and television (satellite and cable).