São João do Piauí Population 2026
São João do Piauí has a population of 21,421, making it the #1644 biggest city in 🇧🇷 Brazil, located in Piauí. It is about 579× smaller than São Paulo, the country's biggest city.
Population (city proper)
21,421
Rank in Brazil
#1644
Coordinates
8.36°S, 42.25°W
~219 m elevation · America/Fortaleza
Distance to capital (Brasília)
1,031 km
640 miles, straight line
Other big cities in Piauí
Cities near São João do Piauí
- Canto do Buriti19,365 people · ~82 km away
- São Raimundo Nonato38,934 people · ~88 km away
- Paulistana21,055 people · ~123 km away
- Afrânio19,349 people · ~138 km away
- Remanso40,586 people · ~142 km away
- Oeiras38,161 people · ~149 km away
FAQ
What is the population of São João do Piauí?
São João do Piauí has a population of 21,421 (city proper, latest official figure via GeoNames), making it the #1644 biggest city in Brazil.
What region is São João do Piauí in?
São João do Piauí is located in Piauí, Brazil.
Is São João do Piauí the capital of Brazil?
No, the capital of Brazil is Brasília, about 1,031 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.