Oeiras Population 2026
Oeiras has a population of 38,161, making it the #877 biggest city in 🇧🇷 Brazil, located in Piauí. It is about 325× smaller than São Paulo, the country's biggest city.
Population (city proper)
38,161
Rank in Brazil
#877
Coordinates
7.03°S, 42.13°W
~181 m elevation · America/Fortaleza
Distance to capital (Brasília)
1,160 km
720 miles, straight line
Other big cities in Piauí
Cities near Oeiras
- Picos83,090 people · ~74 km away
- Valença do Piauí22,279 people · ~81 km away
- Floriano62,036 people · ~103 km away
- Barão de Grajaú18,984 people · ~103 km away
- Regeneração17,133 people · ~108 km away
- Jaicós17,527 people · ~116 km away
FAQ
What is the population of Oeiras?
Oeiras has a population of 38,161 (city proper, latest official figure via GeoNames), making it the #877 biggest city in Brazil.
What region is Oeiras in?
Oeiras is located in Piauí, Brazil.
Is Oeiras the capital of Brazil?
No, the capital of Brazil is Brasília, about 1,160 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.