What is the population of União?

The population of União is 44,569.

Where is União located?

União is located at latitude -4.5964600 and longitude -42.8646800. It is in Brazil.

What is the area of União?

The area of União is 1173.447 km².

What time zone is União in?

União is in the America/Fortaleza time zone.

How has the population of União changed?

The population of União has increased from 42,654 (2010) to 44,569 (2020), a change of 4.5%.

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Uniao (União), Piauí

Uniao: municipality in Piaui, Brazil

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County Snapshot

União at a glance

União currently has 1 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

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Piauí counties

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Largest city

União

Population 15,677

Quick Facts about União

Population	44,569
Country	Brazil
State	Piauí (Brazil)
Phone Area Codes	86
Area	1173.45 km²
Latitude & Longitude	-4.5965,-42.8647
Altitude	171 feet / 52 meters
Time Zone	America/Fortaleza
Local time	14:41:32 (23rd April 2026)

Geography

União is located at 4°35'47"S 42°51'53"W (-4.5964600, -42.8646800). It has 3 neighbors: Teresina, Lagoa Alegre and Miguel Alves.

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Demographics

Year	Population	% Change	Method
2010	42,654	-	census
2020	44,569	4.3%	estimation process

Other places with the same name (1)

União, Piauí with a population of 15,677 people.