Definition
Oeiras is a municipality located in the state of Piauí in the Northeast Region of Brazil.
Overview
Oeiras lies in the southwestern part of Piauí, positioned near the Piauí River. According to the Brazilian Institute of Geography and Statistics (IBGE), the municipality had an estimated population of approximately 20,000 inhabitants in 2022 and covers an area of roughly 2,300 km². The local economy is primarily based on agriculture, livestock raising, and small‑scale commerce. The municipality is administered by a mayor (prefeito) and a municipal council (câmara municipal) elected every four years.
Etymology/Origin
The name “Oeiras” is derived from the Portuguese town of Oeiras, near Lisbon. The settlement was originally founded in the early 18th century by Portuguese colonists and was officially designated as “Vila de São José de Oeiras” before being shortened to Oeiras.
Characteristics
- Geography: Oeiras is situated in a transition zone between the semi‑arid interior of Piauí and the more humid coastal region. The terrain includes low‑lying river valleys and gently rolling plateaus.
- Climate: The municipality experiences a tropical semi‑humid climate (Köppen Aw), with a rainy season from December to May and a dry season from June to November. Average annual precipitation is about 1,200 mm, and mean temperatures range from 22 °C to 28 °C.
- Economy: Agricultural production centers on staple crops such as cassava, beans, corn, and rice, while cattle raising is a significant source of income. Limited industrial activity includes food processing and artisanal textile workshops.
- Culture and Heritage: Oeiras retains a historic urban core with colonial‑era architecture, including the Igreja Matriz de São José and several 18th‑century sobrados. The municipality holds annual religious festivals, notably the Feast of Saint Joseph, which attract regional participants.
- Infrastructure: Transportation links consist of regional roads connecting Oeiras to the state capital Teresina (approximately 280 km away) and neighboring municipalities. Public services include primary and secondary schools, a health clinic network, and municipal utilities.
Related Topics
- List of municipalities in Piauí
- History of Portuguese colonisation in Brazil
- Semi‑arid climate of the Northeast Region of Brazil
- Agricultural practices in the Brazilian cerrado
All information presented reflects data available from governmental and academic sources up to 2023. Where specific details could not be verified, the entry notes the limitation accordingly.