Learn more about Chicago, Illinois

Chicago has 28 sister cities around the world.

When Chicago was incorporated in 1837, it chose the motto Urbs in Horto, a Latin phrase which means "City in a Garden".

Chicago is known worldwide for its architecture. In 1885, the first steel-framed high-rise building, the Home Insurance Building, was built as Chicago ushered in the skyscraper era.

Other Chicago, Illinois stats:

Population: 2.7 million

The average household size was 2.67 and the average family size was 3.5.

Median resident age: 32.9 years, Illinois average age: 42.2 years old.

Source: 2010 U.S. Census

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