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Illinois is a state in the Midwestern region of the United States. Of the fifty U.S. states, it has the fifth largest gross domestic product , the sixth largest population, and the 25th largest land area. Chicago is the state's largest city and the fifth largest city in North America with the capital in Springfield, located in the center of the state; other major metropolitan areas include Metro East , Peoria and Rockford.

With Chicago in the northeast, small industrial cities and immense farmland in the north and center, and natural resources such as coal, timber, and petroleum in the south, Illinois has a highly diverse economy. Owing to its central location and geography, the state is a major transportation hub: the Port of Chicago enjoys access to the Atlantic Ocean through the Great Lakes and Saint Lawrence Seaway, and to the Gulf of Mexico from the Mississippi River via the Illinois Waterway. Additionally, the Mississippi, Ohio, and Wabash rivers form parts of the state's boundaries. Chicago's O'Hare International Airport has been among the world's ten busiest airports for decades. Described as a microcosm of the entire United States, Illinois has long been considered a bellwether in social, cultural, and political terms.

What is now Illinois was inhabited for thousands of years by various indigenous cultures, including the advanced civilization centered in the Cahokia region. The French were the first Europeans to arrive, settling near the Mississippi River in the 17th century, in a region they called Illinois Country, part of the sprawling colony of New France. Following U.S. independence in 1783, American settlers began arriving from Kentucky via the Ohio River, and the population grew from south to north. The Louisiana Purchase of 1803 incorporated Illinois into the U.S., and in 1818 it achieved statehood. The Erie Canal brought increased commercial activity in the Great Lakes, and the small town of Chicago became one of the fastest growing settlements in North America, benefiting from its location in one of the few natural harbors on the southern section of Lake Michigan. The invention of the self-scouring steel plow by Illinois transplant John Deere turned the state's rich prairie into some of the world's most productive and valuable farmland, attracting immigrant farmers from Germany and Sweden. In the mid 19th century, the Illinois and Michigan Canal and a sprawling railroad network greatly facilitated trade, commerce, and settlement, making the state a transportation hub for the nation.

By 1900, the growth of industrial jobs in the northern cities, and coal mining in the central and southern areas, attracted immigrants from Eastern and Southern Europe. As one of America's most industrialized states, Illinois was an important manufacturing center for much of the 20th century, especially during both world wars. The Great Migration from the South established a large community of African Americans in the state, particularly Chicago, who founded the city's famous jazz and blues cultures. Chicago, which had become one of the country's leading cultural, economic, and population centers, remains a global city; its metropolitan area of Chicagoland encompasses about 65% of the state's population.

Three U.S. presidents have been elected while living in Illinois: Abraham Lincoln, Ulysses S. Grant, and Barack Obama; additionally, Ronald Reagan, whose political career was based in California, was born and raised in the state. Today, Illinois honors Lincoln with its official state slogan , which has been displayed on its license plates since 1954. The state is the site of the Abraham Lincoln Presidential Library and Museum in Springfield and the future home of the Barack Obama Presidential Center in Chicago.

Zip Codes in Illinois

Zip Code
City
County
Map
Alden
Antioch
Arlington Heights
Arlington Heights
Arlington Heights
Elk Grove Village
Rolling Meadows
Elk Grove Village
Barrington
Barrington
Crystal Lake
Crystal Lake
Deerfield
Des Plaines
Des Plaines
Des Plaines
Des Plaines
Fox Lake
Fox River Grove
Glencoe
Glenview
Glenview
Golf
Grayslake
Gurnee
Harvard
Hebron
Highland Park
Fort Sheridan
Palatine
Crystal Lake
Highwood
Ingleside
Island Lake
Kenilworth
Lake Bluff
Lake Forest
Lake Villa
Lake Zurich
Libertyville
Mchenry
Mchenry
Morton Grove
Palatine
Mount Prospect
Mundelein
Vernon Hills
Northbrook
North Chicago
Northbrook
Palatine
Park Ridge
Lincolnshire
Prospect Heights
Richmond
Ringwood
Round Lake
Palatine
Russell
Skokie
Skokie
Palatine
Waukegan
Spring Grove
Techny
Wadsworth
Wauconda
Waukegan
North Chicago
Waukegan
Great Lakes
Buffalo Grove
Wheeling
Wilmette
Winnetka
Palatine
Palatine
Winthrop Harbor
Wonder Lake
Woodstock
Zion
Addison
Algonquin
Bartlett
Bellwood
Bensenville
Bensenville
Streamwood
Bloomingdale
Burlington
Carpentersville
Clare
Cortland
Creston
Dekalb
Carol Stream
Bloomingdale
Dundee
Elburn
Elgin
Elgin
Carol Stream
Elgin
Elgin
Elmhurst
Carol Stream
Esmond
Forest Park
Franklin Park
Carol Stream
Hanover Park
Geneva
Genoa
Gilberts
Glen Ellyn
Glen Ellyn
Glendale Heights
Hampshire
Hines
Huntley
Itasca
Kaneville
Kingston
Kirkland
Lafox
Lombard
Malta
Maple Park
Marengo
Maywood
Westchester
Broadview
Lake In The Hills
Medinah
Schaumburg
Melrose Park
Melrose Park
Hillside
Berkeley
Melrose Park
Stone Park
Schaumburg
Hoffman Estates
Plato Center
River Grove
Roselle
Schaumburg
Saint Charles
Saint Charles
Schiller Park
South Elgin
Sycamore
Hoffman Estates
Union
Villa Park
Wasco
Wayne
West Chicago
West Chicago
Wheaton
Carol Stream
Wheaton
Winfield
Wood Dale
Hoffman Estates
Schaumburg
Schaumburg
Schaumburg
Schaumburg
Carol Stream
Carol Stream
Evanston
Evanston
Evanston
Evanston
Evanston
Evanston
Chicago
Oak Park
Oak Park
Oak Park
Oak Park
River Forest
Wood Dale
Beecher
Berwyn
Crest Hill
Shorewood
Blue Island
Braceville
Braidwood
Calumet City
Channahon
Chicago Heights
Chicago Heights
Chicago Ridge
Coal City
Crete
Dolton
Elwood
Flossmoor
Frankfort
Gardner
Glenwood
Harvey
Markham
Hazel Crest
Homewood
Joliet
Joliet
Joliet
Joliet
Joliet
Joliet
Kinsman
Lansing
Lemont
Bolingbrook
Lockport
Manhattan
Matteson
Mazon
Midlothian
Romeoville
Minooka
Mokena
Monee
Morris
New Lenox
Oak Forest
Oak Lawn
Oak Lawn
Bridgeview
Hometown
Hickory Hills
Justice
Burbank
Olympia Fields
Orland Park
Palos Heights
Palos Park
Palos Hills
Park Forest
Orland Park
Peotone
Posen
Ransom
Richton Park
Robbins
South Holland
South Wilmington
Steger
Thornton
Tinley Park
Country Club Hills
Verona
Willow Springs
Wilmington
Worth
University Park
Tinley Park
Bolingbrook
Homer Glen
Bedford Park
Summit Argo
Aurora
Aurora
Aurora
Aurora
Aurora
Aurora
Batavia
Big Rock
Bristol
Brookfield
Clarendon Hills
Downers Grove
Downers Grove
Woodridge
Earlville
Hinckley
Hinsdale
Hinsdale
Oak Brook
La Grange
La Grange Park
Willowbrook
Lee
Leland
Lisle
Lyons
Millbrook
Millington
Montgomery
Mooseheart
Naperville
Newark
North Aurora
Oswego
Plainfield
Plano
Riverside
Sandwich
Serena
Shabbona
Sheridan
Somonauk
Steward
Sugar Grove
Warrenville
Waterman
Wedron
Western Springs
Westmont
Yorkville
Darien
Naperville
Naperville
Naperville
Naperville
Naperville
Aurora
Aurora
Plainfield
Plainfield
Aurora
Fox Valley
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Chicago
Harwood Heights
Elmwood Park
Lincolnwood
Niles
Alsip
Cicero
Evergreen Park
Riverdale
Kankakee
Aroma Park
Ashkum
Beaverville
Bonfield
Bourbonnais
Bradley
Buckingham
Buckley
Cabery
Chatsworth
Chebanse
Cissna Park
Claytonville
Clifton
Crescent City
Danforth
Donovan
East Lynn
Elliott
Emington
Gibson City
Gilman
Goodwine
Grant Park
Herscher
Hoopeston
Hopkins Park
Iroquois
Kempton
Manteno
Martinton
Melvin
Milford
Momence
Onarga
Papineau
Paxton
Pembroke Township
Piper City
Reddick
Roberts
Rossville
Saint Anne
Sheldon
Stockland
Thawville
Union Hill
Watseka
Wellington
Woodland
Apple River
Ashton
Baileyville
Belvidere
Byron
Caledonia
Capron
Cedarville
Chadwick
Chana
Cherry Valley
Davis Junction
Dixon
East Dubuque
Elizabeth
Forreston
Franklin Grove
Freeport
Garden Prairie
German Valley
Hanover
Harmon
Holcomb
Lanark
Leaf River
Lindenwood
Mc Connell
Milledgeville
Monroe Center
Mount Carroll
Mount Morris
Nachusa
Orangeville
Oregon
Pearl City
Pecatonica
Polo
Poplar Grove
Rochelle
Rock City
Rock Falls
Rockton
Savanna
Scales Mound
Shannon
Shirland
South Beloit
Sterling
Stillman Valley
Stockton
Winnebago
Winslow
Woosung
Rockford
Rockford
Rockford
Rockford
Rockford
Rockford
Rockford
Rockford
Rockford
Rockford
Loves Park
Rockford
Rockford
Machesney Park
Rockford
Rockford
Loves Park
Loves Park
Loves Park
Rock Island
Rock Island
Aledo
Andalusia
Andover
Annawan
Atkinson
Buffalo Prairie
Cambridge
Carbon Cliff
Coal Valley
Colona
Deer Grove
East Moline
Geneseo
Hillsdale
Hooppole
Illinois City
Lynn Center
Matherville
Morrison
New Boston
Orion
Osco
Port Byron
Preemption
Prophetstown
Rapids City
Reynolds
Sherrard
Tampico
Taylor Ridge
Thomson
Rock Island
La Salle
Amboy
Arlington
Blackstone
Bureau
Cedar Point
Cherry
Compton
Cornell
Dalzell
Depue
Dover
Eldena
Grand Ridge
Granville
Hennepin
Kasbeer
La Moille
Lee Center
Leonore
Long Point
Lostant
Mc Nabb
Magnolia
Malden
Manlius
Marseilles
Mendota
Mineral
Neponset
New Bedford
Oglesby
Ottawa
Paw Paw
Princeton
Rutland
Seatonville
Seneca
Sheffield
Spring Valley
Standard
Streator
Sublette
Tiskilwa
Toluca
Tonica
Triumph
Troy Grove
Van Orin
Walnut
Wenona
West Brooklyn
Wyanet
Galesburg
Galesburg
Abingdon
Alexis
Alpha
Altona
Bardolph
Berwick
Biggsville
Bishop Hill
Blandinsville
Bradford
Bushnell
Cameron
Camp Grove
Castleton
Dahinda
East Galesburg
Ellisville
Fairview
Fiatt
Galva
Gerlaw
Gilson
Gladstone
Good Hope
Henderson
Industry
Ipava
Keithsburg
Kewanee
Kirkwood
Knoxville
La Fayette
La Harpe
Laura
Littleton
Little York
Maquon
Marietta
Monmouth
New Windsor
North Henderson
Oneida
Ophiem
Oquawka
Prairie City
Raritan
Rio
Roseville
Saint Augustine
Seaton
Smithfield
Smithshire
Speer
Stronghurst
Table Grove
Toulon
Vermont
Victoria
Viola
Wataga
Williamsfield
Woodhull
Wyoming
Astoria
Benson
Brimfield
Bryant
Canton
Chillicothe
Dunfermline
Dunlap
Edelstein
Edwards
Elmwood
Eureka
Farmington
Forest City
Glasford
Green Valley
Groveland
Hanna City
Kingston Mines
La Rose
Lewistown
Liverpool
London Mills
Lowpoint
Manito
Mapleton
Metamora
Morton
Mossville
Norris
Princeville
Putnam
Roanoke
Saint David
South Pekin
Sparland
Topeka
Tremont
Trivoli
Washburn
Washington
Yates City
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Creve Coeur
East Peoria
Peoria
Peoria
Peoria
Peoria
Peoria Heights
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Peoria
Bloomington
Bloomington
Bloomington
Bloomington
Bloomington
Bloomington
Anchor
Armington
Arrowsmith
Atlanta
Bellflower
Carlock
Chenoa
Clinton
Colfax
Congerville
Cooksville
Cropsey
Danvers
Deer Creek
Delavan
Dewitt
Downs
Ellsworth
El Paso
Fairbury
Flanagan
Forrest
Goodfield
Graymont
Gridley
Heyworth
Hopedale
Hudson
Kenney
Lawndale
Le Roy
Lexington
Mc Lean
Mackinaw
Maroa
Merna
Minier
Minonk
Normal
Pontiac
Saunemin
Saybrook
Shirley
Sibley
Stanford
Towanda
Wapella
Waynesville
Normal
Bloomington
Bloomington
Allerton
Armstrong
Bement
Bismarck
Bondville
Broadlands
Cerro Gordo
Champaign
Champaign
Champaign
Champaign
Champaign
Champaign
Cisco
Collison
Danville
Danville
De Land
Fairmount
Farmer City
Fithian
Foosland
Georgetown
Gifford
Henning
Indianola
Ivesdale
Longview
Mahomet
Mansfield
Milmine
Monticello
Oakwood
Penfield
Pesotum
Potomac
Rantoul
Ridge Farm
Sadorus
Saint Joseph
Seymour
Thomasboro
Weldon
Westville
White Heath
Arcola
Arthur
Ashmore
Atwood
Bethany
Brocton
Camargo
Charleston
Chrisman
Dalton City
Hammond
Hindsboro
Humboldt
Hume
Kansas
La Place
Lovington
Mattoon
Metcalf
Murdock
Newman
Oakland
Paris
Redmon
Sullivan
Tuscola
Vermilion
Villa Grove
Windsor
Alhambra
Alton
Batchtown
Bethalto
Bingham
Brighton
Brussels
Bunker Hill
Carrollton
Coffeen
Cottage Hills
Donnellson
Dorsey
Eagarville
East Alton
Edwardsville
Edwardsville