São Pedro da Aldeia

• Name — São Pedro da Aldeia • Settlement Type — Municipality • Official Name — Municipality of São Pedro da Aldeia • Mapsize — 250px • Subdivision Type — Country • Subdivision Type1 — Region • Subdivision Type2 — State • Subdivision Name — Brazil • Subdivision Name1 — Southeast • Subdivision Name2 — Rio de Janeiro • Established Title — Founded • Established Date — 16 May 1617 • Population As Of — 2022 Census • Population Total — 104,029 • Population Density Km2 — auto • Population Est — 110,677 • Pop Est As Of — 2025 • Population Demonym — aldeense • Timezone — BRT • Utc Offset — −3 • Area Code — 22 • Postal Code Type — Postal Code • Postal Code — 28.940-000 • Blank Name — HDI (2010) • Blank Info — 0.712 – high • Website — pmspa.rj.gov.br/

It lies in the east of Rio de Janeiro State on the Araruama Lagoon, 120 km from the state capital, Rio de Janeiro. The Araruama lagoon is the largest hypersaline lagoon in the world. Sports like windsurfing, kitesurfing and others like these are common because of the wind force in São Pedro da Aldeia

Salt extraction and fishing from the Araruama Lagoon are the two most important industries.

São Pedro da Aldeia was founded in 1660 by Catholic priests on the top of a hill named after Saint Peter, in honor of whom the city was named. A chapel was built that was later replaced by an architecturally significant church. Nowadays it is the main historical monument in the town and is protected by state laws. Some colonial buildings and landmarks remain today, such as the cemetery beside the church, where the family graves of the founders of the town remain. In the 1960s the Brazilian Air Force and Navy built a military airport there, bringing many migrants from others parts of the country and increasing the town's population.