Guarulhos is the second largest city in the Brazilian state of São Paulo and a suburb of São Paulo city itself. In the last few years it has passed up Campinas. The population in 2006 is 1,283,253, the density is 4,035.26 inh./km² and the area is 318 km². It is 12th largest incorporated city in Brazil.

Ranks 8th by GDP among Brazilian cities; 2nd in São Paulo state. (source:IBGE, Brazil's national institute of statistics. GDP by cities report, published in 2005 with data from 2002).

It is the 10th largest suburb in the world.
The name comes from the Tupi language, and means Eaters, big-bellied people; a reference to the original indigenous inhabitants of the area.