Illinois Area Codes
16 active area codes · Chicago · Population around 11,208,064
Illinois has 16 active area codes, serving cities like Chicago, Aurora, and Naperville. Some of them are overlays that share the same territory, so local calls there use all ten digits. Each code below links to its cities, carriers, timezone, and coverage map.
Illinois Area Code Map
What area codes does Illinois have?
- 217SpringfieldCentral Time (CT) · 326 cities · 847,630
- 224OverlayElginCentral Time (CT) · 108 cities · 2,020,276
- 309PeoriaCentral Time (CT) · 203 cities · 728,223
- 312OverlayChicagoCentral Time (CT) · 1 city · 2,721,308
- 331OverlayAuroraCentral Time (CT) · 61 cities · 1,704,087
- 447SpringfieldCentral Time (CT) · 326 cities · 847,630
- 464OverlayCiceroCentral Time (CT) · 93 cities · 1,383,707
- 618OverlayBellevilleCentral Time (CT) · 329 cities · 822,193
- 630OverlayAuroraCentral Time (CT) · 61 cities · 1,704,087
- 708OverlayCiceroCentral Time (CT) · 93 cities · 1,383,707
- 730OverlayBellevilleCentral Time (CT) · 329 cities · 822,193
- 773OverlayChicagoCentral Time (CT) · 1 city · 2,721,308
- 779OverlayRockfordCentral Time (CT) · 275 cities · 1,546,238
- 815OverlayRockfordCentral Time (CT) · 275 cities · 1,546,238
- 847OverlayElginCentral Time (CT) · 108 cities · 2,020,276
- 872OverlayChicagoCentral Time (CT) · 1 city · 2,721,308
Which cities are the largest in Illinois?
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Frequently Asked Questions
How many area codes does Illinois have?
Illinois has 16 active area codes: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 872.
What is the main area code for Illinois?
The 217 area code is among the primary area codes for Illinois, serving Springfield and surrounding communities.
What are the largest cities in Illinois?
The largest cities in Illinois include Chicago, Aurora, Naperville, Joliet, Rockford.
What is the total population of Illinois?
Illinois has an estimated total population of 11,208,064 based on US Census PEP 2024 data.