About Pio IX
Pio IX is a city in Piaui, Brazil with a population of 17,613. It is the 1,985th largest of the 2,250 cities of 15,000 or more listed in Brazil, and the 27,998th largest worldwide. It lies 1,274 km from Brasília.
Key Facts
Country
Region
Rank in region
#30of 37
Coordinates
-6.835, -40.613
Record updated
29 June 2025
Entry edited, not measured
City population, GeoNames. GeoNames publishes no year for its population figures, so “record updated” is when the entry was last edited — not the date the population was measured. Elevation is modelled from a digital elevation model rather than surveyed, so it is approximate.
Nearby Cities
All 2,250 in BrazilClosest listed cities by great-circle distance from the city centre.