Peruíbe is a municipality in the state of São Paulo in Brazil. It is part of the Metropolitan Region of Baixada Santista. The population is 69,001 (2020 est.) in an area of 324.55 km2. Peruíbe is located to the southwest of the city of São Paulo and west of Santos.
Peruíbe's urban area is entirely along the Atlantic Ocean fronting its famous beach which is one of the longest in the state. The urban area covers a small part of the municipality, with population growing steadily. Most of the area north of downtown Peruíbe is forested with trees, and is hilly or mountainous as part of the Serra do Mar. An Indian Reservation named Terra Indígena Piaçagüera (Piaçagüera Indigenous Land) which is home to the Guaraní tribe named Nhandhevá covers an area of 27.95 km2 with a perimeter of 38 km.
The municipality contains part of the Tupiniquins Ecological Station. It contains the 359 ha Ilha do Ameixal Area of Relevant Ecological Interest created in 1985. It also contains a small part of the 84,425 ha Juréia-Itatins Ecological Station, a strictly protected area of well-preserved Atlantic Forest created in 1986. It contains the 5040 ha Itinguçu State Park, created in 2006. It contains 91% of the 1487 ha Barra do Una Sustainable Development Reserve, also created in 2006. The municipality contains the 33 ha Ilhas Queimada Pequena e Queimada Grande Area of Relevant Ecological Interest, created in 1985 to protect two islands off the coast. The Ilhas do Abrigo e Guararitama Wildlife Refuge protects two other islands in the Atlantic Ocean to the east of the town.
