The state of Wisconsin is divided into 72 counties. Brown County is the oldest (founded in 1818), while Menominee County is the youngest (established in 1959).

Milwaukee County is the most populous, with a population of 947,735. Marathon County (4,001 km2) has the largest land area, while Pepin County has the smallest (601 km2).

Please find a list of all Wisconsin counties sorted alphabetically below.

• Adams County, WI
• Ashland County, WI
• Barron County, WI
• Bayfield County, WI
• Brown County, WI
• Buffalo County, WI
• Burnett County, WI
• Calumet County, WI
• Chippewa County, WI
• Clark County, WI
• Columbia County, WI
• Crawford County, WI
• Dane County, WI
• Dodge County, WI
• Door County, WI
• Douglas County, WI
• Dunn County, WI
• Eau Claire County, WI
• Florence County, WI
• Fond du Lac County, WI
• Forest County, WI
• Grant County, WI
• Green County, WI
• Green Lake County, WI
• Iowa County, WI
• Iron County, WI
• Jackson County, WI
• Jefferson County, WI
• Juneau County, WI
• Kenosha County, WI
• Kewaunee County, WI
• La Crosse County, WI
• Lafayette County, WI
• Langlade County, WI
• Lincoln County, WI
• Manitowoc County, WI
• Marathon County, WI
• Marinette County, WI
• Marquette County, WI
• Menominee County, WI
• Milwaukee County, WI
• Monroe County, WI
• Ocoto County, WI
• Oneida County, WI
• Outagamie County, WI
• Ozaukee County, WI
• Pepin County, WI
• Pierce County, WI
• Polk County, WI
• Portage County, WI
• Price County, WI
• Racine County, WI
• Richland County, WI
• Rock County, WI
• Rusk County, WI
• Saint Croix County, WI
• Sauk County, WI
• Sawyer County, WI
• Shawano County, WI
• Sheboygan County, WI
• Taylor County, WI
• Trempealeau County, WI
• Vernon County, WI
• Vilas County, WI
• Walworth County, WI
• Washburn County, WI
• Washington County, WI
• Waukesha County, WI
• Waupaca County, WI
• Waushara County, WI
• Winnebago County, WI
• Wood County, WI