IL
Midwest21st state

Illinois

The Prairie State

Capital

Springfield

Population

12,812,508

Area

57,914 sq mi

Founded

December 3, 1818

Highlights

  • Chicago, the third-largest city in the US and a global cultural hub
  • Birthplace of Abraham Lincoln, the 16th President
  • Chicago-style deep dish pizza and the Chicago Blues music scene
  • Millennium Park and the iconic Cloud Gate sculpture

Top Metropolitan Cities

Chicago cityscape

Chicago

2,696,555

The 'Windy City,' a global hub for architecture, jazz, blues, and deep-dish pizza.

Aurora

180,542

Illinois' second-largest city, a diverse community west of Chicago.

Joliet

150,362

A historic city on the Des Plaines River, known for its riverboat casinos.

Naperville

149,540

One of the most affluent cities in the Midwest, consistently ranked among the best places to live.

Rockford

148,278

Known as the 'Forest City,' a manufacturing hub with a growing arts community.

HempADU City Gallery

Sustainable hemp ADU homes across America

New York City
New York City
Los Angeles
Los Angeles
Hemp Architects
Hemp Architects
Hemp Engineers
Hemp Engineers
Hemp Contractors
Hemp Contractors
SkyScraper.Technology
SkyScraper.Technology
HempCrete.PRO
HempCrete.PRO
Hemp P
Hemp P
Hemp.Supplies
Hemp.Supplies
Las Vegas
Las Vegas

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USA States Guide

A comprehensive reference guide to all 50 US states and their top metropolitan cities.

By the Numbers

  • 50 States covered
  • 4 Geographic regions
  • 250+ Metropolitan cities listed
© 2026 USA States Guide. All rights reserved.Data reflects major metropolitan areas by population.