Living Person
Cook_County,_Illinois
is
As of April 12, 2026
6 years old
approximately!
Date of Birth
(2020 ) is
Rat
Year
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
approx.Cosmic Age Calculator
Moon
approx. 85.1 years old
Mercury
approx. 26.4 years old
Venus
approx. 10.3 years old
Mars
approx. 3.4 years old
Jupiter
approx. 0.5 years old
Saturn
approx. 0.2 years old
* Calculated based on each planet's orbital period.
Cook County | |
|---|---|
 Seal | |
 Location within Illinois | |
 Illinois's location within the United States | |
| Coordinates: 41°48′31″N 87°53′20″W / 41.80861°N 87.88889°W | |
| Country | United States |
| State | Illinois |
| Region | Northern Illinois |
| Metro area | Chicago metropolitan area |
| Incorporated | January 15, 1831 |
| Named after | Daniel Pope Cook |
| County seat | Chicago |
| Incorporated municipalities | 135 (total)
|
| Government | |
| • Type | County commission |
| • Body | Board of Commissioners |
| • President | Toni R. Preckwinkle (D) |
| Area | |
• County | 1,635 sq mi (4,230 km) |
| • Land | 945 sq mi (2,450 km) |
| • Water | 690 sq mi (1,800 km) |
| • Metro | 10,874 sq mi (28,160 km) |
| • Rank | 6th largest county in Illinois |
| Highest elevation | 950 ft (290 m) |
| Lowest elevation | 580 ft (180 m) |
| Population (2020) | |
• County | 5,275,541 |
• Estimate (2024) | 5,182,617  |
| • Density | 5,580/sq mi (2,160/km) |
| GDP | |
| • County | $521.617 billion (2023) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (Central) |
| ZIP Code prefixes | 600xx–608xx |
| Area codes | 847/224, 312/872, 773/872, 708/464 |
| FIPS code | 17-031 |
| GNIS feature ID | 1784766 |
| Congressional districts | 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th |
| Website | cookcountyil.gov |
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