The state of Michigan, USA is currently served by a total of 12 area codes:
These Michigan area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.
| City | County | Area Codes |
|---|---|---|
| Ann Arbor | Washtenaw | 734 |
| Battle Creek | Calhoun | 269 |
| Bay City | Bay | 989 |
| Dearborn | Wayne | 313 |
| Dearborn Heights | Wayne | 313 |
| Detroit | Wayne | 313 |
| East Lansing | Ingham | 517 |
| Eastpointe | Macomb | 586 |
| Flint | Genesee | 810 |
| Grand Rapids | Kent | 616 |
| Holland | Ottawa | 616 |
| Jackson | Jackson | 517 |
| Kalamazoo | Kalamazoo | 269 |
| Kentwood | Kent | 616 |
| Lansing | Eaton | 517 |
| Lincoln Park | Wayne | 313 |
| Livonia | Wayne | 734 |
| Midland | Midland | 989 |
| Muskegon | Muskegon | 231 |
| Novi | Oakland | 248, 947 |
| Pontiac | Oakland | 248, 947 |
| Portage | Kalamazoo | 269 |
| Roseville | Macomb | 586 |
| Royal Oak | Oakland | 248, 947 |
| Saginaw | Saginaw | 989 |
| Southfield | Oakland | 248, 947 |
| St Clair Shores | Macomb | 586 |
| Sterling Heights | Macomb | 586 |
| Taylor | Wayne | 313 |
| Troy | Oakland | 248, 947 |
| Warren | Macomb | 586 |
| Westland | Wayne | 734 |
| Wyoming | Kent | 616 |