The state of Wisconsin, USA is currently served by a total of 8 area codes:
These Wisconsin 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 |
|---|---|---|
| Appleton | Outagamie | 920, 274 |
| Beloit | Rock | 608, 353 |
| Brookfield | Waukesha | 262 |
| Eau Claire | Eau Claire | 715, 534 |
| Fond Du Lac | Fond Du Lac | 920, 274 |
| Franklin | Milwaukee | 414 |
| Green Bay | Brown | 920, 274 |
| Greenfield | Milwaukee | 414 |
| Janesville | Rock | 608, 353 |
| Kenosha | Kenosha | 262 |
| La Crosse | La Crosse | 608, 353 |
| Madison | Dane | 608, 353 |
| Manitowoc | Manitowoc | 920, 274 |
| Menomonee Falls | Waukesha | 262 |
| Milwaukee | Milwaukee | 414 |
| New Berlin | Waukesha | 262 |
| Oak Creek | Milwaukee | 414 |
| Oshkosh | Winnebago | 920, 274 |
| Racine | Racine | 262 |
| Sheboygan | Sheboygan | 920, 274 |
| Sun Prairie | Dane | 608, 353 |
| Waukesha | Waukesha | 262 |
| Wausau | Marathon | 715, 534 |
| Wauwatosa | Milwaukee | 414 |
| West Allis | Milwaukee | 414 |
| West Bend | Washington | 262 |