Illinois Area Codes
Here is the current list of area codes in the state of Illinois. There are 1025 area codes in Illinois that are currently being used. Find out all Illinois area codes below by searching each of the cities below. We have the most up-to-date list of area codes in Illinois.
| Area Code | State | City | Timezone |
|---|---|---|---|
| 815 | Illinois | Utica | Central |
| 618 | Illinois | Crossville | Central |
| 217 | Illinois | Oconee | Central |
| 815 | Illinois | Cissna Park | Central |
| 309 | Illinois | Toluca | Central |
| 779 | Illinois | Belvidere | Central |
| 309 | Illinois | Seaton | Central |
| 708 | Illinois | Oak Lawn | Central |
| 217 | Illinois | De Land | Central |
| 618 | Illinois | New Baden | Central |
| 309 | Illinois | Blandinsville | Central |
| 224 | Illinois | Barrington | Central |
| 217 | Illinois | Franklin | Central |
| 217 | Illinois | Buffalo | Central |
| 217 | Illinois | Pawnee | Central |
| 309 | Illinois | Swan Creek | Central |
| 217 | Illinois | Gillespie | Central |
| 815 | Illinois | Onarga | Central |
| 618 | Illinois | Hoffman | Central |
| 217 | Illinois | Fisher | Central |
| 815 | Illinois | Rockton | Central |
| 815 | Illinois | Braidwood | Central |
| 618 | Illinois | Orchardville | Central |
| 815 | Illinois | Belvidere | Central |
| 618 | Illinois | Carterville | Central |