Praia Grande is a municipality located on the southern coast of the Brazilian state of São Paulo. It is situated within the Baixada Santista Metropolitan Region and is part of the Immediate Region of Santos. The municipality consists of its headquarters and the district of Solemar.
The city experienced significant growth between 2010 and 2022, recording a population increase from 262,051 to 349,935 inhabitants according to IBGE census data. This growth made it the fastest-growing city in the Baixada Santista region during that period. With an area of 149.652 km², Praia Grande is currently the second most populous coastal city in the state of São Paulo, surpassed only by Santos.