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Area Codes in Illinois

Explore area codes connected to ZIP codes in Illinois. Use this page to move between area code lookup, ZIP code coverage, and state-level browsing.

View ZIP codes in Illinois Browse all area codes
State
Illinois
IL
ZIP codes
1,576
Population
12,848,544
217
Illinois
ZIPs 369
Cities 318
Pop. 1,148,424
618
Illinois
ZIPs 335
Cities 322
Pop. 1,244,725
815
Illinois
ZIPs 277
Cities 251
Pop. 1,739,466
309
Illinois
ZIPs 246
Cities 203
Pop. 933,248
847
Illinois
ZIPs 97
Cities 70
Pop. 1,930,489
630
Illinois
ZIPs 88
Cities 54
Pop. 1,679,861
708
Illinois
ZIPs 82
Cities 72
Pop. 1,554,344
773
Illinois
ZIPs 64
Cities 1
Pop. 2,404,996
312
Illinois
ZIPs 18
Cities 1
Pop. 212,991

About area codes in Illinois

Area codes in Illinois connect phone numbering geography with ZIP code regions, cities, and local coverage. Use the cards above to open each area code page, then continue to the related ZIP code pages for deeper postal lookup.