Outline of Illinois

The following outline is provided as an overview of and topical guide to the U.S. state of Illinois:
Illinois - fifth most populous of the 50 states of the United States of America. Illinois lies between Lake Michigan and the Mississippi River and the Ohio River in the Midwestern United States. Chicago, Illinois, is the third most populous city and the third most populous metropolitan area of the United States. The United States created the Illinois Territory on March 1, 1809. Illinois joined the Union as the 21st state on December 3, 1818.

General reference

Names
* Common name: Illinois
** Pronunciation:
* Official name: State of Illinois
* Abbreviations and name codes
** Postal symbol: IL
** ISO 3166-2 code: US-IL
** Internet second-level domain: .il.us
* Nicknames
** Land of Lincoln
** Prairie State
** Corn State
** Inland Empire State
** Sucker State
** Garden of the West
** Baja Wisconsin
Adjectival: Illinois
Demonym: Illinoisan

Geography of Illinois

Geography of Illinois

Illinois is: a U.S. state, a federal state of the United States of America
Location
* Northern Hemisphere
* Western Hemisphere
** Americas
*** North America
**** Anglo America
**** Northern America
***** United States of America
****** Contiguous United States
******* Central United States
******** Corn Belt
******** East North Central States
******* Midwestern United States
***** Great Lakes Region
Population of Illinois: 12,830,632
Area of Illinois:, 25th of the 50 states.
Atlas of Illinois

Places in Illinois

Historic places in Illinois
* Ghost towns in Illinois
* National Historic Landmarks in Illinois
* National Register of Historic Places listings in Illinois
** Bridges on the National Register of Historic Places in Illinois
National Natural Landmarks in Illinois
National parks in Illinois
State parks in Illinois

Environment of Illinois

Natural geographic features of Illinois

Regions of Illinois

Regions of Illinois

Administrative divisions of Illinois

The 102 counties of the state of Illinois
* Municipalities in Illinois
** Cities in Illinois
*** State capital of Illinois:
*** City nicknames in Illinois
** Towns in Illinois
** Unincorporated communities in Illinois
* Census-designated places in Illinois

Demography of Illinois

Demographics of Illinois

Government and politics of Illinois

Politics of Illinois

Branches of the government of Illinois

Government of Illinois

Executive branch of the government of Illinois

Legislative branch of the government of Illinois

Judicial branch of the government of Illinois

Courts of Illinois

Supreme Court of Illinois

Law and order in Illinois

Law of Illinois

Military in Illinois

History of Illinois

History of Illinois

History of Illinois, by period

Prehistory of Illinois
*Indigenous peoples
**Mississippian culture
***Cahokia
French colony of Louisiane, 1699–1763; Upper Louisiana was called Illinois Country.
*Treaty of Paris of 1763
British Province of Quebec, -1791
American Revolutionary War, April 19, 1775 – September 3, 1783
*United States Declaration of Independence, July 4, 1776
*Illinois campaign, July 1778 – February 1779
*Treaty of Paris, September 3, 1783
*Unorganized territory of the United States, 1783–1787
Territory Northwest of the River Ohio, -1803
Territory of Indiana, -1816
Territory of Illinois, 1809–1818
*Peoria War, 1813
State of Illinois becomes 21st State admitted to the United States of America on December 3, 1818
*Black Hawk War, 1832
*Abraham Lincoln becomes 16th President of the United States on March 4, 1861
*American Civil War, April 12, 1861 – May 13, 1865
**Illinois in the American Civil War
**[Abraham Abraham Lincoln|Lincoln assassination|Assassination] of President Abraham Lincoln in Washington, D.C., on April 14, 1865
***President Lincoln dies in Washington, D.C., on April 15, 1865
*Ulysses S. Grant becomes 18th President of the United States on March 4, 1869
*Ronald Reagan becomes 40th President of the United States on January 20, 1981

History of Illinois, by region

History of Illinois, by subject

Culture of Illinois

Culture of Illinois

The Arts in Illinois

Sports in Illinois

Sports in Illinois

Professional sports teams in Illinois

Economy and infrastructure of Illinois

Economy of Illinois

Education in Illinois

Education in Illinois