| COUNTY | REGION | |
| Adams | CENTRAL AREA | CEAR |
| Ashland | NORTHWEST AREA | NWAR |
| Barron | NORTHWEST AREA | NWAR |
| Bayfield | NORTHWEST AREA | NWAR |
| Brown | EAST CENTRAL AREA | ECAR |
| Buffalo | WEST CENTRAL AREA | WCAR |
| Burnett | NORTHWEST AREA | NWAR |
| Calumet | EAST CENTRAL AREA | ECAR |
| Chippewa | WEST CENTRAL AREA | WCAR |
| Clark | CENTRAL AREA | CEAR |
| Columbia | SOUTH CENTRAL AREA | SCAR |
| Crawford | SOUTHWEST AREA | SWAR |
| Dane | SOUTH CENTRAL AREA | SCAR |
| Dodge | SOUTH CENTRAL AREA | SCAR |
| Door | EAST CENTRAL AREA | ECAR |
| Douglas | NORTHWEST AREA | NWAR |
| Dunn | WEST CENTRAL AREA | WCAR |
| Eau Claire | WEST CENTRAL AREA | WCAR |
| Florence | NORTHEAST AREA | NEAR |
| Fond du Lac | EAST CENTRAL AREA | ECAR |
| Forest | NORTHEAST AREA | NEAR |
| Grant | SOUTHWEST AREA | SWAR |
| Green | SOUTH CENTRAL AREA | SCAR |
| Green Lake | CENTRAL AREA | CEAR |
| Iowa | SOUTHWEST AREA | SWAR |
| Iron | NORTHWEST AREA | NWAR |
| Jackson | WEST CENTRAL AREA | WCAR |
| Jefferson | SOUTH CENTRAL AREA | SCAR |
| Juneau | CENTRAL AREA | CEAR |
| Kenosha | SOUTHEAST AREA | SEAR |
| Kewaunee | EAST CENTRAL AREA | ECAR |
| La Crosse | WEST CENTRAL AREA | WCAR |
| Lafayette | SOUTHWEST AREA | SWAR |
| Langlade | NORTHEAST AREA | NEAR |
| Lincoln | NORTHEAST AREA | NEAR |
| Manitowoc | EAST CENTRAL AREA | ECAR |
| Marathon | CENTRAL AREA | CEAR |
| Marinette | NORTHEAST AREA | NEAR |
| Marquette | CENTRAL AREA | CEAR |
| Menominee | NORTHEAST AREA | NEAR |
| Milwaukee | MILWAUKEE AREA | MWAR |
| Monroe | WEST CENTRAL AREA | WCAR |
| Oconto | NORTHEAST AREA | NEAR |
| Oneida | NORTHEAST AREA | NEAR |
| Outagamie | EAST CENTRAL AREA | ECAR |
| Ozaukee | MILWAUKEE AREA | MWAR |
| Pepin | WEST CENTRAL AREA | WCAR |
| Pierce | WEST CENTRAL AREA | WCAR |
| Polk | NORTHWEST AREA | NWAR |
| Portage | CENTRAL AREA | CEAR |
| Price | NORTHWEST AREA | NWAR |
| Racine | SOUTHEAST AREA | SEAR |
| Richland | SOUTHWEST AREA | SWAR |
| Rock | SOUTH CENTRAL AREA | SCAR |
| Rusk | NORTHWEST AREA | NWAR |
| Sauk | SOUTH CENTRAL AREA | SCAR |
| Sawyer | NORTHWEST AREA | NWAR |
| Shawano | EAST CENTRAL AREA | ECAR |
| Sheboygan | EAST CENTRAL AREA | ECAR |
| St. Croix | WEST CENTRAL AREA | WCAR |
| Taylor | CENTRAL AREA | CEAR |
| Trempealeau | WEST CENTRAL AREA | WCAR |
| Vernon | SOUTHWEST AREA | SWAR |
| Vilas | NORTHEAST AREA | NEAR |
| Walworth | SOUTHEAST AREA | SEAR |
| Washburn | NORTHWEST AREA | NWAR |
| Washington | MILWAUKEE AREA | MWAR |
| Waukesha | MILWAUKEE AREA | MWAR |
| Waupaca | EAST CENTRAL AREA | ECAR |
| Waushara | CENTRAL AREA | CEAR |
| Winnebago | EAST CENTRAL AREA | ECAR |
| Wood | CENTRAL AREA | CEAR |
View TIME System Counties by Region