State IntegrityReceipts, not verdicts

Parnaíba: population and official figures

Population (IBGE estimate, 1 July)
171,342
2026
Population, 2022 census
162,159
2022
Area (km²)
436.9
2022
People per km² (2022 census)
371.1
2022

In depth

What is the population of Parnaíba?

IBGE, Brazil's national statistics institute, estimated the population of Parnaíba at 171,342 on 1 July 2026, the 187th largest of Brazil's 5,570 municipalities, the 2nd largest of the 224 municipalities in Piauí state. The 2022 census counted 162,159 residents.

Source: Instituto Brasileiro de Geografia e Estatística (IBGE) · saved copy

Is the population of Parnaíba growing?

Between the 2010 and 2022 censuses the population of Parnaíba grew by 16,454, from 145,705 (2010 count adjusted to 2022 boundaries) to 162,159, an average of +0.90% a year; the 152nd fastest of 320 major Brazilian cities (Brazil: +0.52% a year).

Source: Instituto Brasileiro de Geografia e Estatística (IBGE) · saved copy

How has the population of Parnaíba changed since the 2022 census?

IBGE's estimates put Parnaíba's population 9,183 above the 2022 census count by July 2026 (+5.7%), against +5.5% for Brazil as a whole; the estimate was 170,491 in 2025 and 169,552 in 2024.

Source: Instituto Brasileiro de Geografia e Estatística (IBGE) · saved copy

How big is Parnaíba?

Parnaíba covers 436.9 km² and had 371.1 residents per km² at the 2022 census, the 157th least densely populated of 320 major Brazilian cities (Brazil: 23.86 per km²).

Source: Instituto Brasileiro de Geografia e Estatística (IBGE) · saved copy

What share of Piauí state's population lives in Parnaíba?

Parnaíba holds 5.1% of the estimated 3,392,617 people in Piauí state and 0.08% of Brazil's 214,211,951 (2026 estimates).

Source: Instituto Brasileiro de Geografia e Estatística (IBGE) · saved copy

Is Parnaíba a metropolis?

IBGE's urban hierarchy (REGIC) ranks Parnaíba as a sub-regional centre, level 3A on a scale whose top level is 1A, and Parnaíba is part of the Região Metropolitana de Parnaíba.

Source: Instituto Brasileiro de Geografia e Estatística (IBGE) · saved copy

More figures

Who runs Parnaíba?

In Brazil, cities and towns are run by municipalities: Mayor (prefeito) and council (câmara de vereadores) directly elected for four years; mayors can serve two terms in a row. Primary schools, basic health care, urban planning, local transport, waste; each has its own organic law.

How local power works in Brazil

Cities of a similar size in Brazil

Up a level: all cities in Brazil · Brazil · government and power

Sources

Each saved copy is the file exactly as downloaded, kept so the figures can be checked even if the source changes. Report an error.