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  3. Illinois Area Codes

Illinois Area Codes

15 area codes serve Illinois

Illinois Area Codes Overview

Illinois, a state with diverse urban and rural landscapes, encompasses multiple area codes that serve its varied communities. The most prominent area code is 312, associated with Chicago, the state's largest city, renowned for its cultural vibrancy and economic significance. The surrounding areas, including suburbs and neighboring cities, often fall under the purview of area codes such as 630, 708, and 773. Meanwhile, central and southern Illinois, with cities like Springfield and Champaign, use area codes such as 217 and 618. As residents and businesses span the state's expanse, each area code contributes to the unique character of its respective region, reflecting the rich tapestry of Illinois's geographical and cultural diversity.

Largest 121 cities in Illinois

City Population
Chicago 2,695,598
Aurora 197,899
Rockford 152,871
Joliet 147,433
Naperville 141,853
Springfield 116,250
Peoria 115,007
Elgin 108,188
Waukegan 89,078
Cicero 83,891
Champaign 81,055
Bloomington 76,610
Decatur 76,122
Arlington Heights 75,101
Evanston 74,486
Schaumburg 74,227
Bolingbrook 73,366
Palatine 68,557
Skokie 64,784
Des Plaines 58,364
Orland Park 56,767
Tinley Park 56,703
Oak Lawn 56,690
Berwyn 56,657
Mount Prospect 54,167
Wheaton 52,894
Normal 52,497
Hoffman Estates 51,895
Oak Park 51,878
Downers Grove 47,833
Glenview 44,692
Belleville 44,478
Elmhurst 44,121
DeKalb 43,862
Moline 43,483
Lombard 43,165
Buffalo Grove 41,496
Urbana 41,250
Bartlett 41,208
Crystal Lake 40,743
Quincy 40,633
Streamwood 39,858
Carol Stream 39,711
Romeoville 39,680
Plainfield 39,581
Rock Island 39,018
Hanover Park 37,973
Carpentersville 37,691
Wheeling 37,648
Park Ridge 37,480
Calumet City 37,042
Addison 36,942
Glendale Heights 34,208
Pekin 34,094
Northbrook 33,170
Elk Grove Village 33,127
Danville 33,027
St. Charles 32,974
Woodridge 32,971
North Chicago 32,574
Galesburg 32,195
Gurnee 31,295
Mundelein 31,064
Oswego 30,355
Chicago Heights 30,276
Algonquin 30,046
Granite City 29,849
Niles 29,803
Highland Park 29,763
Lake in the Hills 28,965
Burbank 28,925
Lansing 28,331
O'Fallon 28,281
Round Lake Beach 28,175
Oak Forest 27,962
Alton 27,865
Kankakee 27,537
Glen Ellyn 27,450
Wilmette 27,087
West Chicago 27,086
East St. Louis 27,006
McHenry 26,992
Batavia 26,045
Carbondale 25,902
Freeport 25,638
Belvidere 25,585
Collinsville 25,579
Melrose Park 25,411
Harvey 25,282
Vernon Hills 25,113
Elmwood Park 24,883
Lockport 24,839
Woodstock 24,770
Westmont 24,685
Zion 24,413
New Lenox 24,394
Edwardsville 24,293
Huntley 24,291
Homer Glen 24,220
Rolling Meadows 24,099
Maywood 24,090
Loves Park 23,996
Blue Island 23,706
Machesney Park 23,499
East Peoria 23,402
Morton Grove 23,270
Dolton 23,153
Roselle 22,763
Lisle 22,390
Darien 22,086
South Holland 22,030
Bloomingdale 22,018
South Elgin 21,985
Park Forest 21,975
Villa Park 21,904
Charleston 21,838
Geneva 21,495
East Moline 21,302
Grayslake 20,957
Crest Hill 20,837
Libertyville 20,315

Illinois Area Codes List

217 Area Code

224 Area Code

309 Area Code

312 Area Code

331 Area Code

447 Area Code

464 Area Code

618 Area Code

630 Area Code

708 Area Code

773 Area Code

779 Area Code

815 Area Code

847 Area Code

872 Area Code