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Garden of the Gods Wilderness, Southern Illinois
Garden of the Gods Wilderness, in Shawnee National Forrest, Illinois.
Image: Daniel Schwen

___ Reference Map of Illinois (IL)

About Illinois

Topographic Map of Illinois
Topographic Map of Illinois showing the location of major metropolitan areas: Chicagoland, Greater St. Louis and the Quad Cities. The state's major rivers: the Ohio, the Mississippi, the Wabash, the Kaskaskia, and the Illinois rivers. In the flat landscape of Illinois, the highest point is the banana shaped Charles Mound at 376 m (1,235 ft).

Illinois Flag Illinois is a landlocked state in the east north central US, the region is also known as the Midwestern United States.

Illinois is bordered by Wisconsin to the north, Michigan via a water boundary in Lake Michigan to north east; Indiana to the east; Kentucky to south east, the Mississippi River forms a natural border with Missouri and Iowa to the west. The states nickname is "The Prairie State".

The region now known as Illinois was colonized by the French in the 1600s and was ceded to Britain in 1763, it was acquired by the US in 1783. Illinois entered the Union on 3rd December 1818 as the 21st state.

Illinois covers an area of 149,998 km² (57,914 sq mi) [1], it ranks 25th in size of the 50 states, compared Illinois is approximately half the size of Italy.

Main feature of Illinois' landscape are the fertile plains of the Central Lowland, which make up approximately 80 % of the state, it is a portion of the Interior Lowlands, a sub region of the Interior Plains, the largest physiographic area in the continuous US was created by glaciers during the last Ice Age. Within the Central Lowland lies the Illinois Basin with its sources of coal, petroleum, and other minerals.
Situated in the north west corner of the state is Illinois' portion of the Driftless Area, an area of rugged terrain that was not glaciated in the Ice Age. Within the Driftless Area is the state's highest natural elevation Charles Mound at 376 m (1,235 ft), located at the border to Wisconsin. In the south of Illinois is the picturesque landscape of the Shawnee Hills. The Shawnee National Forest and the Ohio River Valley have become a major tourist destination.

Abraham Lincoln Memorial Bridge and LaSalle Rail Bridge over the Illinois River
Abraham Lincoln Memorial Bridge and LaSalle Rail Bridge over the Illinois River.
Image: Joseph Norton and Ronald Frazier

Illinois has a population of 12.8 million people (est. 2018) [2], capital city is Springfield, primate city is Chicago, largest metro area is Chicago metropolitan area (Chicago-Naperville-Michigan City, aka Chicagoland). Other metropolitan areas are the Quad Cities Metropolitan Area and Greater St. Louis (Metro East).
Major cities of Illinois (with more than 100,000 inhabitants) are Aurora, Rockford, Joliet, Naperville, Peoria, and Elgin.

The two busiest airports in the state are Chicago O'Hare International Airport (IATA code: ORD), and Chicago Midway International Airport (IATA code: MDW).

Cities and Towns in Illinois

The map shows the location of following cities and towns in Illinois:

Chicago skyscrapers seen from John Hancock Center
View of Chicago's skyscrapers from John Hancock Center looking south.
Image: Allen McGregor

Largest cities in Illinois with a population of more than 100,000:
Chicago (2.7 million), Aurora (198,000), Rockford (153,000), Joliet (147,000), Naperville (142,000), Springfield (117,000), Peoria (115,000), and Elgin (108,000).

Other cities and towns:
Alton, Arlington Heights, Beardstown, Belleville, Bloomington, Cairo, Canton, Carbondale, Carmi, Centralia, Champaign, Charleston, Chicago Heights, Danville, De Kalb, Decatur, Dixon, East St Louis, Effingham, Evanston, Freeport, Galesburg, Granite City, Harrisburg, Havana, Jacksonville, Jerseyville, Kankakee, Kewanee, La Salle, Lincoln, Macomb, Marion, Mattoon, Moline, Monmouth, Mount Vernon, Normal, North Chicago, Olney, Ottawa, Palatine, Pana, Pekin, Peru, Pittsfield, Pontiac, Quincy, Rantoul, Rock Island, Salem, Skokie, Sterling, Streator, Urbana, Vandalia, Waukegan, and West Frankfort.

The detailed map below is showing the US state of Illinois with boundaries, the location of the state capital Springfield, major cities and populated places, streams and lakes, interstate highways, principal highways, and railroads.

You are free to use this map for educational purposes (fair use), please refer to the Nations Online Project.

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Reference Map of Illinois
Reference Map of Illinois State

Map is based on a state map of The National Atlas of the USA.
Map of the USA Map of Iowa Map of Michigan Map of Indiana Map of Missouri Map of Kentucky Map of Wisconsin
More about Illinois and the United States:

Cities -- Information about, and searchable maps of:
Illinois's capital Springfield
The City of Chicago

U.S. States:
US State Capitals
Profile of the 50 U.S. States
Maps of the 50 U.S. States
Flags of the 50 U.S. States
Area of the 50 U.S. States
Population of the 50 U.S. States

Map of the USA
Reference Map of Mainland USA.
Searchable map/satellite view of the United States.
Time zone map of the USA
Major US Airports
Most populated cities in the U.S.
United States Country Profile

Political Map of North America
Physical Map of North America

Springfield Weather Conditions

Chicago Current Weather Conditions

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