Cook County is a city located in United States. According to the latest available data (2026), the population of Cook County is approximately 5,275,541 residents. The city is one of the major urban areas in United States.

5,275,541 residents (2026)

Cook County City Statistics

CityCook County
CountryUS United States
Population5,275,541
Latitude41.8
Longitude-87.7167
RegionIllinois
Data Year2026

Where is Cook County US located?

Cook County is located in United States, in the Illinois region, at approximately 41.8 latitude and -87.7167 longitude.

Nearby Cities

US New York City United States — Pop. 8,804,190 US Harris County United States — Pop. 4,731,145 MX Catemaco Municipality Mexico — Pop. 3,453,456 MX Mexico City Mexico — Pop. 9,209,944 US Maricopa County United States — Pop. 4,420,568 MX Guadalajara metropolitan area Mexico — Pop. 5,350,000 US San Diego County United States — Pop. 3,298,634 US Los Angeles United States — Pop. 3,898,747

Other Cities in United States US

Los Angeles County Pop. 10,014,009 New York City Pop. 8,804,190 Harris County Pop. 4,731,145 Maricopa County Pop. 4,420,568 Los Angeles Pop. 3,898,747 San Diego County Pop. 3,298,634

View all cities in United States →

Largest Cities in United States US

# City Population
5 Los Angeles County 10,014,009
6 New York City 8,804,190
1 Harris County 4,731,145
2 Maricopa County 4,420,568
3 Los Angeles 3,898,747

Frequently Asked Questions

What is the population of Cook County?

The population of Cook County is approximately 5,275,541 residents according to the latest available data (2026).

Where is Cook County located?

Cook County is located in United States at approximately 41.8 latitude and -87.7167 longitude.

Is Cook County one of the largest cities in United States?

With a population of 5,275,541, Cook County is one of the major urban areas in United States.

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